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Hibernate example source code file (collection_mapping.po)
This example Hibernate source code file (collection_mapping.po) is included in the DevDaily.com
"Java Source Code
Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.
The Hibernate collection_mapping.po source code
# translation of Collection_Mapping.po to
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# Language /mnt/hgfs/base/Hibernate/Reference translations for PACKAGE package.
# Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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msgid ""
msgstr ""
"Project-Id-Version: Collection_Mapping\n"
"Report-Msgid-Bugs-To: http://bugs.kde.org\n"
"POT-Creation-Date: 2010-07-20 21:02+0000\n"
"PO-Revision-Date: 2007-02-26 10:27+1000\n"
"Last-Translator: \n"
"Language-Team: <de@li.org>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"X-Generator: KBabel 1.9.1\n"
#. Tag: title
#: collection_mapping.xml:31
#, fuzzy, no-c-format
msgid "Collection mapping"
msgstr "Collection-Mappings"
#. Tag: title
#: collection_mapping.xml:34
#, no-c-format
msgid "Persistent collections"
msgstr "Persistente Collections"
#. Tag: para
#: collection_mapping.xml:36
#, fuzzy, no-c-format
msgid ""
"Naturally Hibernate also allows to persist collections. These persistent "
"collections can contain almost any other Hibernate type, including: basic "
"types, custom types, components and references to other entities. The "
"distinction between value and reference semantics is in this context very "
"important. An object in a collection might be handled with \"value\" "
"semantics (its life cycle fully depends on the collection owner), or it "
"might be a reference to another entity with its own life cycle. In the "
"latter case, only the \"link\" between the two objects is considered to be a "
"state held by the collection."
msgstr ""
"Collections können fast jeden beliebigen anderen Hibernate-Typ enthalten, "
"einschließlich sämtlicher Grundtypen, angepasster Typen, Komponenten und "
"natürlich Referenzen zu anderen Entities. Das ist ein wichtiger Unterschied: "
"Ein Objekt einer Collection könnte mit \"Wert\"semantik bearbeitet werden "
"(sein Lebenszyklus hängt vollständig vom Besitzer der Collection ab) oder es "
"könnte ein Verweis auf eine andere Entity mit ihrem eigenen Lebenszyklus "
"sein. Im letzteren Fall wird nur die \"Verbindung\" zwischen den beiden "
"Objekten als von der Collection gehaltener Status angesehen."
#. Tag: para
#: collection_mapping.xml:46
#, fuzzy, no-c-format
msgid ""
"As a requirement persistent collection-valued fields must be declared as an "
"interface type (see <xref linkend=\"example.collection.mapping.annotations\"/"
">). The actual interface might be <literal>java.util.Set, "
"<literal>java.util.Collection, java.util.List, "
"<literal>java.util.Map, java.util.SortedSet, "
"<literal>java.util.SortedMap or anything you like (\"anything you "
"like\" means you will have to write an implementation of <literal>org."
"hibernate.usertype.UserCollectionType</literal>)."
msgstr ""
"Das tatsächliche Interface könnte <literal>java.util.Set, "
"<literal>java.util.Collection, java.util.List, "
"<literal>java.util.Map, java.util.SortedSet, "
"<literal>java.util.SortedMap oder ... was immer Sie möchten sein! "
"(Wobei \"was immer Sie möchten\" bedeutet, dass Sie eine Implementierung von "
"<literal>org.hibernate.usertype.UserCollectionType werden "
"schreiben müssen)."
#. Tag: para
#: collection_mapping.xml:57
#, fuzzy, no-c-format
msgid ""
"Notice how in <xref linkend=\"example.collection.mapping.annotations\"/> the "
"instance variable <literal>parts was initialized with an instance "
"of <literal>HashSet. This is the best way to initialize collection "
"valued properties of newly instantiated (non-persistent) instances. When you "
"make the instance persistent, by calling <literal>persist(), "
"Hibernate will actually replace the <literal>HashSet with an "
"instance of Hibernate's own implementation of <literal>Set. Be "
"aware of the following error:"
msgstr ""
"Beachten Sie, wie wir die Instanzvariable mit einer Instanz von "
"<literal>HashSet initialisiert haben. Dieses ist die beste Art, "
"neu initialisierte (nicht-persistente) Collection-wertige Properties zu "
"instanziieren. Wenn Sie - etwa durch Aufruf von <literal>persist() "
"- die Instanz persistent machen, so wird Hibernate das <literal>HashSetSet, HashSet, TreeMapTreeSet or ArrayList, "
"depending on the interface type."
msgstr ""
"Je nach Interface-Typ verhalten sich die von Hibernate eingespeisten "
"Collections wie <literal>HashMap, HashSet, "
"<literal>TreeMap, TreeSet oder "
"<literal>ArrayList."
#. Tag: para
#: collection_mapping.xml:78
#, fuzzy, no-c-format
msgid ""
"Collections instances have the usual behavior of value types. They are "
"automatically persisted when referenced by a persistent object and are "
"automatically deleted when unreferenced. If a collection is passed from one "
"persistent object to another, its elements might be moved from one table to "
"another. Two entities cannot share a reference to the same collection "
"instance. Due to the underlying relational model, collection-valued "
"properties do not support null value semantics. Hibernate does not "
"distinguish between a null collection reference and an empty collection."
msgstr ""
"Instanzen von Collections folgen dem Verhalten von Wertetypen. Sie werden "
"automatisch persistent gemacht, wenn durch ein persistentes Objekt auf sie "
"verwiesen wird und gelöscht, wenn kein Verweis auf sie existiert. Falls eine "
"Collection von einem persistenten Objekt an ein anderes weitergegeben wird, "
"so ist es möglich, dass deren Elemente von einer Tabelle zu einer anderen "
"Tabelle verschoben werden. Zwei Entities können sich keinen Verweis zu "
"derselben Instanz einer Collection teilen. Wegen des zu Grunde liegenden "
"relationalen Modells unterstützen Collection-wertige Properties keine "
"Nullwert-Semantik. Hibernate unterscheidet nicht zwischen einem Null-"
"Collection-Verweis und einer leeren Collection."
#. Tag: para
#: collection_mapping.xml:89
#, fuzzy, no-c-format
msgid ""
"Use persistent collections the same way you use ordinary Java collections. "
"However, ensure you understand the semantics of bidirectional associations "
"(see <xref linkend=\"collections-bidirectional\"/>)."
msgstr ""
"Sie werden mit all dem jedoch meist wenig zu tun haben. Verwenden Sie "
"persistente Collections genau so, wie sie reguläre Java-Collections "
"verwenden würden. Stellen Sie aber sicher, dass Sie die Semantik "
"bidirektionaler Assoziationen verstehen (wir gehen später noch näher darauf "
"ein)."
#. Tag: title
#: collection_mapping.xml:97
#, fuzzy, no-c-format
msgid "How to map collections"
msgstr "Sortierte Collections"
#. Tag: para
#: collection_mapping.xml:99
#, no-c-format
msgid ""
"Using annotations you can map <classname>Collections, "
"<classname>Lists, Maps and "
"<classname>Sets of associated entities using @OneToMany and "
"@ManyToMany. For collections of a basic or embeddable type use "
"@ElementCollection. In the simplest case a collection mapping looks like "
"this:"
msgstr ""
#. Tag: title
#: collection_mapping.xml:107
#, no-c-format
msgid "Collection mapping using @OneToMany and @JoinColumn"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:109
#, fuzzy, no-c-format
msgid ""
"@Entity\n"
"public class Product {\n"
"\n"
" private String serialNumber;\n"
" private Set<Part> parts = new HashSet<Part>();\n"
"\n"
" @Id\n"
" public String getSerialNumber() { return serialNumber; }\n"
" void setSerialNumber(String sn) { serialNumber = sn; }\n"
" \n"
" @OneToMany\n"
" @JoinColumn(name=\"PART_ID\")\n"
" public Set<Part> getParts() { return parts; }\n"
" void setParts(Set parts) { this.parts = parts; }\n"
"}\n"
"\n"
"\n"
"@Entity\n"
"public class Part {\n"
" ...\n"
"}"
msgstr ""
"public class Product {\n"
" private String serialNumber;\n"
" private Set parts = new HashSet();\n"
" \n"
" public Set getParts() { return parts; }\n"
" void setParts(Set parts) { this.parts = parts; }\n"
" public String getSerialNumber() { return serialNumber; }\n"
" void setSerialNumber(String sn) { serialNumber = sn; }\n"
"}"
#. Tag: para
#: collection_mapping.xml:112
#, no-c-format
msgid ""
"Product describes a unidirectional relationship with Part using the join "
"column PART_ID. In this unidirectional one to many scenario you can also use "
"a join table as seen in <xref linkend=\"example-one-to-many-with-join-table"
"\"/>."
msgstr ""
#. Tag: title
#: collection_mapping.xml:118
#, no-c-format
msgid "Collection mapping using @OneToMany and @JoinTable"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:121
#, no-c-format
msgid ""
"@Entity\n"
"public class Product {\n"
"\n"
" private String serialNumber;\n"
" private Set<Part> parts = new HashSet<Part>();\n"
"\n"
" @Id\n"
" public String getSerialNumber() { return serialNumber; }\n"
" void setSerialNumber(String sn) { serialNumber = sn; }\n"
" \n"
" @OneToMany\n"
" @JoinTable(\n"
" name=\"PRODUCT_PARTS\",\n"
" joinColumns = @JoinColumn( name=\"PRODUCT_ID\"),\n"
" inverseJoinColumns = @JoinColumn( name=\"PART_ID\")\n"
" )\n"
" public Set<Part> getParts() { return parts; }\n"
" void setParts(Set parts) { this.parts = parts; }\n"
"}\n"
"\n"
"\n"
"@Entity\n"
"public class Part {\n"
" ...\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:124
#, no-c-format
msgid ""
"Without describing any physical mapping (no <classname>@JoinColumn@JoinTable), a unidirectional one to "
"many with join table is used. The table name is the concatenation of the "
"owner table name, _, and the other side table name. The foreign key name(s) "
"referencing the owner table is the concatenation of the owner table, _, and "
"the owner primary key column(s) name. The foreign key name(s) referencing "
"the other side is the concatenation of the owner property name, _, and the "
"other side primary key column(s) name. A unique constraint is added to the "
"foreign key referencing the other side table to reflect the one to many."
msgstr ""
#. Tag: para
#: collection_mapping.xml:135
#, fuzzy, no-c-format
msgid ""
"Lets have a look now how collections are mapped using Hibernate mapping "
"files. In this case the first step is to chose the right mapping element. It "
"depends on the type of interface. For example, a <literal><set>Set-Element für Mapping-Properties des Typs "
"<literal>Set verwendet."
#. Tag: title
#: collection_mapping.xml:142
#, no-c-format
msgid "Mapping a Set using <set>"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:144
#, fuzzy, no-c-format
msgid ""
"<class name=\"Product\">\n"
" <id name=\"serialNumber\" column=\"productSerialNumber\"/>\n"
" <set name=\"parts\">\n"
" <key column=\"productSerialNumber\" not-null=\"true\"/>\n"
" <one-to-many class=\"Part\"/>\n"
" </set>\n"
"</class>"
msgstr ""
"<class name=\"Product\">\n"
" <id name=\"serialNumber\" column=\"productSerialNumber\"/>\n"
" <set name=\"parts\">\n"
" <key column=\"productSerialNumber\" not-null=\"true\"/>\n"
" <one-to-many class=\"Part\"/>\n"
" </set>\n"
"</class>"
#. Tag: para
#: collection_mapping.xml:147
#, fuzzy, no-c-format
msgid ""
"In <xref linkend=\"example.collections.set\"/> a one-to-many "
"association</emphasis> links the Product and "
"<literal>Part entities. This association requires the existence of "
"a foreign key column and possibly an index column to the <literal>Part zu Part "
"macht die Existenz einer Spalte mit Fremdschlüssel und möglicherweise einer "
"Indexspalte zur <literal>Part-Tabelle erforderlich. Ein "
"<literal><one-to-many>-Tag zeigt an, dass dies eine \"One-to-"
"Many\"-Assoziation ist."
#. Tag: para
#: collection_mapping.xml:156
#, fuzzy, no-c-format
msgid ""
"An instance of the contained entity class cannot belong to more than one "
"instance of the collection."
msgstr ""
"Eine Instanz der enthaltenen Entity-Klasse kann nicht zu mehr als einer "
"Instanz der Collection gehören"
#. Tag: para
#: collection_mapping.xml:161
#, fuzzy, no-c-format
msgid ""
"An instance of the contained entity class cannot appear at more than one "
"value of the collection index."
msgstr ""
"Eine Instanz der enthaltenen Entity-Klasse kann nicht an mehr als einem Wert "
"des Collection-Index erscheinen"
#. Tag: para
#: collection_mapping.xml:166
#, no-c-format
msgid ""
"Looking closer at the used <literal><one-to-many> tag we see "
"that it has the following options."
msgstr ""
#. Tag: title
#: collection_mapping.xml:170
#, no-c-format
msgid "options of <one-to-many> element"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:181
#, fuzzy, no-c-format
msgid ""
"<one-to-many\n"
" class=\"ClassName\"\n"
" not-found=\"ignore|exception\"\n"
" entity-name=\"EntityName\"\n"
" node=\"element-name\"\n"
" embed-xml=\"true|false\"\n"
" />"
msgstr ""
"<one-to-many \n"
" class=\"ClassName\"\n"
" not-found=\"ignore|exception\"\n"
" entity-name=\"EntityName\"\n"
" node=\"element-name\"\n"
" embed-xml=\"true|false\"\n"
" />"
#. Tag: para
#: collection_mapping.xml:185
#, fuzzy, no-c-format
msgid "<literal>class (required): the name of the associated class."
msgstr ""
"<literal>class (erforderlich): Der Name der zugehörigen Klasse."
#. Tag: para
#: collection_mapping.xml:190
#, fuzzy, no-c-format
msgid ""
"<literal>not-found (optional - defaults to exception will treat a missing row as a null "
"association."
msgstr ""
"<literal>not-found (optional - standardmäßig exception (optional): the entity name of the associated "
"class, as an alternative to <literal>class."
msgstr ""
"<literal>entity-name (optional): Der Entity-Name der zugehörigen "
"Klasse als Alternative zu <literal>class."
#. Tag: para
#: collection_mapping.xml:206
#, fuzzy, no-c-format
msgid ""
"The <literal><one-to-many> element does not need to declare "
"any columns. Nor is it necessary to specify the <literal>table "
"name anywhere."
msgstr ""
"Beachten Sie, dass das <literal><one-to-many>-Element keine "
"Spalten deklarieren muss. Es ist außerdem nicht nötig, den <literal>table "
"association is declared <literal>NOT NULL, you must declare the "
"<literal><key> mapping not-null=\"true\" "
"or <emphasis>use a bidirectional association with the collection "
"mapping marked <literal>inverse=\"true\". See Falls die Fremdschlüsselspalte einer "
"<literal><one-to-many>-Assoziation als NOT NULL<key>-"
"Mapping <literal>not-null=\"true\" deklarieren oder eine "
"bidirektionale Assoziation</emphasis> mit als inverse=\"true\"tag as shown in <list><map>, <bag>, "
"<literal><array> and <primitive-array><map> element is "
"representative:"
msgstr ""
"Neben <literal><set> gibt es auch <list><map>, <bag>, "
"<literal><array> und <primitive-array><map>-Element ist "
"charakteristisch:"
#. Tag: title
#: collection_mapping.xml:229
#, no-c-format
msgid "Elements of the <map> mapping"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:262
#, fuzzy, no-c-format
msgid ""
"<map\n"
" name=\"propertyName\"\n"
" table=\"table_name\"\n"
" schema=\"schema_name\"\n"
" lazy=\"true|extra|false\"\n"
" inverse=\"true|false\"\n"
" cascade=\"all|none|save-update|delete|all-delete-orphan|delete-orphan\"\n"
" sort=\"unsorted|natural|comparatorClass\"\n"
" order-by=\"column_name asc|desc\"\n"
" where=\"arbitrary sql where condition\"\n"
" fetch=\"join|select|subselect\"\n"
" batch-size=\"N\"\n"
" access=\"field|property|ClassName\"\n"
" optimistic-lock=\"true|false\"\n"
" mutable=\"true|false\"\n"
" node=\"element-name|.\"\n"
" embed-xml=\"true|false\"\n"
">\n"
"\n"
" <key .... />\n"
" <map-key .... />\n"
" <element .... />\n"
"</map>"
msgstr ""
"<map\n"
" name=\"propertyName\"\n"
" table=\"table_name\"\n"
" schema=\"schema_name\"\n"
" lazy=\"true|extra|false\"\n"
" inverse=\"true|false\"\n"
" cascade=\"all|none|save-update|delete|all-delete-orphan|delete-orphan\"\n"
" sort=\"unsorted|natural|comparatorClass\"\n"
" order-by=\"column_name asc|desc\"\n"
" where=\"arbitrary sql where condition\"\n"
" fetch=\"join|select|subselect\"\n"
" batch-size=\"N\"\n"
" access=\"field|property|ClassName\"\n"
" optimistic-lock=\"true|false\"\n"
" mutable=\"true|false\"\n"
" node=\"element-name|.\"\n"
" embed-xml=\"true|false\"\n"
">\n"
"\n"
" <key .... />\n"
" <map-key .... />\n"
" <element .... />\n"
"</map>"
#. Tag: para
#: collection_mapping.xml:266
#, fuzzy, no-c-format
msgid "<literal>name: the collection property name"
msgstr "<literal>name der Property-Name der Collection"
#. Tag: para
#: collection_mapping.xml:270
#, fuzzy, no-c-format
msgid ""
"<literal>table (optional - defaults to property name): the name of "
"the collection table. It is not used for one-to-many associations."
msgstr ""
"<literal>table (optional - standardmäßig der Property-Name) der "
"Name der Collection-Tabelle (wird nicht für \"One-to-Many\"-Assoziationen "
"verwendet)"
#. Tag: para
#: collection_mapping.xml:276
#, fuzzy, no-c-format
msgid ""
"<literal>schema (optional): the name of a table schema to override "
"the schema declared on the root element"
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:281
#, fuzzy, no-c-format
msgid ""
"<literal>lazy (optional - defaults to true): "
"disables lazy fetching and specifies that the association is always eagerly "
"fetched. It can also be used to enable \"extra-lazy\" fetching where most "
"operations do not initialize the collection. This is suitable for large "
"collections."
msgstr ""
"<literal>lazy (optional - standardmäßig true) "
"kann verwendet werden, um das \"lazy Fetching\" (d.h. das Nachladen "
"assoziierter Objekte bei Bedarf) zu deaktivieren und zu bestimmen, dass auf "
"die Assoziation stets mittels \"eager Fetching\" (d.h. zusammengefasstem "
"Laden von Objekt und assoziierten Objekten mit Verbundoperationen) "
"zugegriffen wird. Ebenfalls zur Aktivierung von \"extra-lazy\" Fetching "
"verwendet, bei dem die meisten Vorgänge die Collection nicht initialisieren "
"(passend für sehr große Collections)"
#. Tag: para
#: collection_mapping.xml:290
#, fuzzy, no-c-format
msgid ""
"<literal>inverse (optional - defaults to false (optional - standardmäßig false (optional - defaults to none): "
"enables operations to cascade to child entities."
msgstr ""
"<literal>cascade (optional - standardmäßig none (optional): specifies a sorted collection with "
"<literal>natural sort order or a given comparator class."
msgstr ""
"<literal>sort (optional) bestimmt eine sortierte Collection mit "
"<literal>natural Sortierordnung oder eine bestimmte Klasse von "
"Vergleichsprogramm"
#. Tag: para
#: collection_mapping.xml:308
#, fuzzy, no-c-format
msgid ""
"<literal>order-by (optional): specifies a table column or columns "
"that define the iteration order of the <literal>Map, Setasc or "
"<literal>desc."
msgstr ""
"<literal>order-by (optional, nur JDK1.4) bestimmt eine (oder "
"mehrere) Tabellenspalte(n), die die Iterationsreihenfolge von <literal>MapSet oder \"Bag\" (d.h. Duplikate, Multimenge) "
"mit einem optionalen <literal>asc oder desc "
"definieren"
#. Tag: para
#: collection_mapping.xml:316
#, fuzzy, no-c-format
msgid ""
"<literal>where (optional): specifies an arbitrary SQL "
"<literal>WHERE condition that is used when retrieving or removing "
"the collection. This is useful if the collection needs to contain only a "
"subset of the available data."
msgstr ""
"<literal>where (optional) bestimmt eine arbiträre SQL "
"<literal>WHERE-Bedingung, die bei der Abfrage oder Entfernung der "
"Collection verwendet werden soll (besonders dann nützlich, wenn die "
"Collection nur einen Untersatz der verfügbaren Daten enthalten soll)"
#. Tag: para
#: collection_mapping.xml:324
#, fuzzy, no-c-format
msgid ""
"<literal>fetch (optional, defaults to select): "
"chooses between outer-join fetching, fetching by sequential select, and "
"fetching by sequential subselect."
msgstr ""
"<literal>fetch (optional, standardmäßig select) "
"Wählen Sie zwischen \"Outer-Join\"-Abruf (d.h. äußerem Verbund), Abruf nach "
"sequentieller Auswahl und Fetching nach sequentieller Unterauswahl."
#. Tag: para
#: collection_mapping.xml:331
#, fuzzy, no-c-format
msgid ""
"<literal>batch-size (optional, defaults to 1): "
"specifies a \"batch size\" for lazily fetching instances of this collection."
msgstr ""
"<literal>batch-size (optional, standardmäßig 1) "
"bestimmt eine \"Batch-Größe\" für das \"lazy Fetching\" von Instanzen dieser "
"Collection."
#. Tag: para
#: collection_mapping.xml:337
#, fuzzy, no-c-format
msgid ""
"<literal>access (optional - defaults to property (optional - standardmäßig property (optional - defaults to true (optional - standardmäßig true (optional - defaults to true): "
"a value of <literal>false specifies that the elements of the "
"collection never change. This allows for minor performance optimization in "
"some cases."
msgstr ""
"<literal>mutable (optional - standardmäßig truefalse bestimmt, dass die Elemente "
"der Collection sich niemals ändern (in manchen Fällen eine leichte "
"Optimierung der Performance)."
#. Tag: para
#: collection_mapping.xml:360
#, no-c-format
msgid ""
"After exploring the basic mapping of collections in the preceding paragraphs "
"we will now focus details like physical mapping considerations, indexed "
"collections and collections of value types."
msgstr ""
#. Tag: title
#: collection_mapping.xml:365
#, no-c-format
msgid "Collection foreign keys"
msgstr "Collection-Fremdschlüssel"
#. Tag: para
#: collection_mapping.xml:367
#, fuzzy, no-c-format
msgid ""
"On the database level collection instances are distinguished by the foreign "
"key of the entity that owns the collection. This foreign key is referred to "
"as the <emphasis>collection key column, or columns, of the "
"collection table. The collection key column is mapped by the "
"<literal>@JoinColumn annotation respectively the <"
"key></literal> XML element."
msgstr ""
"Die Instanzen der Collection werden in der Datenbank durch den "
"Fremdschlüssel der Entity, zu der die Collection gehört, unterschieden. "
"Dieser Fremdschlüssel wird als <emphasis>Schlüsselspalte der Collection-"
"Element gemappt."
#. Tag: para
#: collection_mapping.xml:374
#, fuzzy, no-c-format
msgid ""
"There can be a nullability constraint on the foreign key column. For most "
"collections, this is implied. For unidirectional one-to-many associations, "
"the foreign key column is nullable by default, so you may need to specify"
msgstr ""
"Es ist möglich, dass eine \"Nullability\"-Bedingung an der Spalte des "
"Fremdschlüssels existiert. Für die meisten Collections wird dies "
"vorausgesetzt. Bei unidirektionalen \"One-to-Many\"-Assoziationen ist die "
"Spalte des Fremdschlüssels standardmäßig \"nullbar\", weswegen es möglich "
"ist, dass Sie <literal>not-null=\"true\" festlegen müssen."
#. Tag: programlisting
#: collection_mapping.xml:379
#, no-c-format
msgid "@JoinColumn(nullable=false)"
msgstr ""
#. Tag: para
#: collection_mapping.xml:381
#, no-c-format
msgid "<para>or"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:383
#, fuzzy, no-c-format
msgid "<key column=\"productSerialNumber\" not-null=\"true\"/>"
msgstr "<key column=\"productSerialNumber\" not-null=\"true\"/>"
#. Tag: para
#: collection_mapping.xml:385
#, fuzzy, no-c-format
msgid ""
"The foreign key constraint can use <literal>ON DELETE CASCADE. In "
"XML this can be expressed via:"
msgstr ""
"Die Bedingung für den Fremdschlüssel kann <literal>ON DELETE CASCADE element."
msgstr ""
"Die vollständige Definition des <literal><key>-Elements "
"finden Sie im vorangegangenen Kapitel."
#. Tag: title
#: collection_mapping.xml:400
#, no-c-format
msgid "Indexed collections"
msgstr "Indizierte Collections"
#. Tag: para
#: collection_mapping.xml:402
#, no-c-format
msgid ""
"In the following paragraphs we have a closer at the indexed collections "
"<classname>List and Map how the their "
"index can be mapped in Hibernate."
msgstr ""
#. Tag: title
#: collection_mapping.xml:407
#, no-c-format
msgid "Lists"
msgstr ""
#. Tag: para
#: collection_mapping.xml:409
#, no-c-format
msgid "Lists can be mapped in two different ways:"
msgstr ""
#. Tag: para
#: collection_mapping.xml:413
#, no-c-format
msgid "as ordered lists, where the order is not materialized in the database"
msgstr ""
#. Tag: para
#: collection_mapping.xml:418
#, no-c-format
msgid "as indexed lists, where the order is materialized in the database"
msgstr ""
#. Tag: para
#: collection_mapping.xml:423
#, no-c-format
msgid ""
"To order lists in memory, add <literal>@javax.persistence.OrderBy "
"to your property. This annotation takes as parameter a list of comma "
"separated properties (of the target entity) and orders the collection "
"accordingly (eg <code>firstname asc, age desc), if the string is "
"empty, the collection will be ordered by the primary key of the target "
"entity."
msgstr ""
#. Tag: title
#: collection_mapping.xml:432
#, no-c-format
msgid "Ordered lists using <classname>@OrderBy"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:434
#, no-c-format
msgid ""
"@Entity\n"
"public class Customer {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" @OneToMany(mappedBy=\"customer\")\n"
" @OrderBy(\"number\")\n"
" public List<Order> getOrders() { return orders; }\n"
" public void setOrders(List<Order> orders) { this.orders = "
"orders; }\n"
" private List<Order> orders;\n"
"}\n"
"\n"
"@Entity\n"
"public class Order {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" public String getNumber() { return number; }\n"
" public void setNumber(String number) { this.number = number; }\n"
" private String number;\n"
"\n"
" @ManyToOne\n"
" public Customer getCustomer() { return customer; }\n"
" public void setCustomer(Customer customer) { this.customer = customer; }\n"
" private Customer number;\n"
"}\n"
"\n"
"-- Table schema\n"
"|-------------| |----------|\n"
"| Order | | Customer |\n"
"|-------------| |----------|\n"
"| id | | id |\n"
"| number | |----------| \n"
"| customer_id |\n"
"|-------------|"
msgstr ""
#. Tag: para
#: collection_mapping.xml:437
#, no-c-format
msgid ""
"To store the index value in a dedicated column, use the <classname>@javax."
"persistence.OrderColumn</classname> annotation on your property. This "
"annotations describes the column name and attributes of the column keeping "
"the index value. This column is hosted on the table containing the "
"association foreign key. If the column name is not specified, the default is "
"the name of the referencing property, followed by underscore, followed by "
"<literal>ORDER (in the following example, it would be "
"<literal>orders_ORDER)."
msgstr ""
#. Tag: title
#: collection_mapping.xml:448
#, no-c-format
msgid "Explicit index column using <classname>@OrderColumn"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:451
#, no-c-format
msgid ""
"@Entity\n"
"public class Customer {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" @OneToMany(mappedBy=\"customer\")\n"
" @OrderColumn(name=\"orders_index\")\n"
" public List<Order> getOrders() { return orders; }\n"
" public void setOrders(List<Order> orders) { this.orders = "
"orders; }\n"
" private List<Order> orders;\n"
"}\n"
"\n"
"@Entity\n"
"public class Order {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" public String getNumber() { return number; }\n"
" public void setNumber(String number) { this.number = number; }\n"
" private String number;\n"
"\n"
" @ManyToOne\n"
" public Customer getCustomer() { return customer; }\n"
" public void setCustomer(Customer customer) { this.customer = customer; }\n"
" private Customer number;\n"
"}\n"
"\n"
"-- Table schema\n"
"|--------------| |----------|\n"
"| Order | | Customer |\n"
"|--------------| |----------|\n"
"| id | | id |\n"
"| number | |----------| \n"
"| customer_id |\n"
"| orders_order |\n"
"|--------------|"
msgstr ""
#. Tag: para
#: collection_mapping.xml:455
#, no-c-format
msgid ""
"We recommend you to convert <classname>the legacy @org.hibernate.annotations."
"IndexColumn</classname> usages to @OrderColumn unless "
"you are making use of the base property. The <literal>base "
"property lets you define the index value of the first element (aka as base "
"index). The usual value is <literal>0 or 1. The "
"default is 0 like in Java."
msgstr ""
#. Tag: para
#: collection_mapping.xml:464
#, no-c-format
msgid ""
"Looking again at the Hibernate mapping file equivalent, the index of an "
"array or list is always of type <literal>integer and is mapped "
"using the <literal><list-index> element. The mapped column "
"contains sequential integers that are numbered from zero by default."
msgstr ""
#. Tag: title
#: collection_mapping.xml:471
#, no-c-format
msgid "index-list element for indexed collections in xml mapping"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:481
#, no-c-format
msgid ""
"<list-index\n"
" column=\"column_name\"\n"
" base=\"0|1|...\"/>"
msgstr ""
#. Tag: para
#: collection_mapping.xml:485
#, fuzzy, no-c-format
msgid ""
"<literal>column_name (required): the name of the column holding "
"the collection index values."
msgstr ""
"<literal>class (erforderlich): Der Name der zugehörigen Klasse."
#. Tag: para
#: collection_mapping.xml:490
#, fuzzy, no-c-format
msgid ""
"<literal>base (optional - defaults to 0): the "
"value of the index column that corresponds to the first element of the list "
"or array."
msgstr ""
"<literal>cascade (optional - standardmäßig none as the property type, you can map the property as a "
"Hibernate <emphasis><bag>. A bag does not retain its order "
"when it is retrieved from the database, but it can be optionally sorted or "
"ordered."
msgstr ""
"Falls Ihre Tabelle keine Indexspalte besitzt und Sie nach wie vor "
"<literal>List als Property-Typ verwenden wollen, so sollten Sie "
"die Property als eine <emphasis><Bag> mappen. Eine \"Bag\" "
"bewahrt ihre Reihenfolge beim Abruf aus der Datenbank nicht, kann aber "
"optional sortiert oder geordnet werden."
#. Tag: title
#: collection_mapping.xml:506
#, no-c-format
msgid "Maps"
msgstr ""
#. Tag: para
#: collection_mapping.xml:508
#, no-c-format
msgid ""
"The question with <classname>Maps is where the key value is "
"stored. There are everal options. Maps can borrow their keys from one of the "
"associated entity properties or have dedicated columns to store an explicit "
"key."
msgstr ""
#. Tag: para
#: collection_mapping.xml:513
#, no-c-format
msgid ""
"To use one of the target entity property as a key of the map, use "
"<literal>@MapKey(name=\"myProperty\"), where myProperty without the name attribuate, the target entity "
"primary key is used. The map key uses the same column as the property "
"pointed out. There is no additional column defined to hold the map key, "
"because the map key represent a target property. Be aware that once loaded, "
"the key is no longer kept in sync with the property. In other words, if you "
"change the property value, the key will not change automatically in your "
"Java model."
msgstr ""
#. Tag: title
#: collection_mapping.xml:525
#, no-c-format
msgid ""
"Use of target entity property as map key via <classname>@MapKey"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:528
#, no-c-format
msgid ""
"@Entity\n"
"public class Customer {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" @OneToMany(mappedBy=\"customer\")\n"
" @MapKey(name=\"number\")\n"
" public Map<String,Order> getOrders() { return orders; }\n"
" public void setOrders(Map<String,Order> order) { this.orders = "
"orders; }\n"
" private Map<String,Order> orders;\n"
"}\n"
"\n"
"@Entity\n"
"public class Order {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" public String getNumber() { return number; }\n"
" public void setNumber(String number) { this.number = number; }\n"
" private String number;\n"
"\n"
" @ManyToOne\n"
" public Customer getCustomer() { return customer; }\n"
" public void setCustomer(Customer customer) { this.customer = customer; }\n"
" private Customer number;\n"
"}\n"
"\n"
"-- Table schema\n"
"|-------------| |----------|\n"
"| Order | | Customer |\n"
"|-------------| |----------|\n"
"| id | | id |\n"
"| number | |----------| \n"
"| customer_id |\n"
"|-------------|"
msgstr ""
#. Tag: para
#: collection_mapping.xml:531
#, no-c-format
msgid ""
"Alternatively the map key is mapped to a dedicated column or columns. In "
"order to customize the mapping use one of the following annotations:"
msgstr ""
#. Tag: para
#: collection_mapping.xml:537
#, no-c-format
msgid ""
"@<classname>MapKeyColumn if the map key is a basic type. If you "
"don't specify the column name, the name of the property followed by "
"underscore followed by <literal>KEY is used (for example "
"<literal>orders_KEY)."
msgstr ""
#. Tag: para
#: collection_mapping.xml:544
#, no-c-format
msgid ""
"<classname>@MapKeyEnumerated / @MapKeyTemporalDate/@MapKeyJoinColumns/@AttributeOverrideskey. to define the type of "
"the key if you don't use generics."
msgstr ""
#. Tag: title
#: collection_mapping.xml:566
#, no-c-format
msgid "Map key as basic type using <classname>@MapKeyColumn"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:569
#, no-c-format
msgid ""
"@Entity\n"
"public class Customer {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" @OneToMany @JoinTable(name=\"Cust_Order\")\n"
" @MapKeyColumn(name=\"orders_number\")\n"
" public Map<String,Order> getOrders() { return orders; }\n"
" public void setOrders(Map<String,Order> orders) { this.orders = "
"orders; }\n"
" private Map<String,Order> orders;\n"
"}\n"
"\n"
"@Entity\n"
"public class Order {\n"
" @Id @GeneratedValue public Integer getId() { return id; }\n"
" public void setId(Integer id) { this.id = id; }\n"
" private Integer id;\n"
"\n"
" public String getNumber() { return number; }\n"
" public void setNumber(String number) { this.number = number; }\n"
" private String number;\n"
"\n"
" @ManyToOne\n"
" public Customer getCustomer() { return customer; }\n"
" public void setCustomer(Customer customer) { this.customer = customer; }\n"
" private Customer number;\n"
"}\n"
"\n"
"-- Table schema\n"
"|-------------| |----------| |---------------|\n"
"| Order | | Customer | | Cust_Order |\n"
"|-------------| |----------| |---------------|\n"
"| id | | id | | customer_id |\n"
"| number | |----------| | order_id |\n"
"| customer_id | | orders_number |\n"
"|-------------| |---------------|"
msgstr ""
#. Tag: para
#: collection_mapping.xml:573
#, no-c-format
msgid ""
"We recommend you to migrate from <classname>@org.hibernate.annotations."
"MapKey</classname> / @org.hibernate.annotation.MapKeyManyToMany, "
"<literal><map-key-many-to-many> and <composite-"
"map-key></literal>. <map-key> is used for any "
"basic type, <literal><map-key-many-to-many> for an entity "
"reference and <literal><composite-map-key> for a composite "
"type."
msgstr ""
"Neben <literal><set> gibt es auch <list><map>, <bag>, "
"<literal><array> und <primitive-array><map>-Element ist "
"charakteristisch:"
#. Tag: title
#: collection_mapping.xml:590
#, no-c-format
msgid "map-key xml mapping element"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:601
#, no-c-format
msgid ""
"<map-key\n"
" column=\"column_name\"\n"
" formula=\"any SQL expression\"\n"
" type=\"type_name\"\n"
" node=\"@attribute-name\"\n"
" length=\"N\"/>"
msgstr ""
#. Tag: para
#: collection_mapping.xml:605
#, fuzzy, no-c-format
msgid ""
"<literal>column (optional): the name of the column holding the "
"collection index values."
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:610
#, fuzzy, no-c-format
msgid ""
"<literal>formula (optional): a SQL formula used to evaluate the "
"key of the map."
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:615
#, fuzzy, no-c-format
msgid "<literal>type (required): the type of the map keys."
msgstr ""
"<literal>class (erforderlich): Der Name der zugehörigen Klasse."
#. Tag: title
#: collection_mapping.xml:623
#, fuzzy, no-c-format
msgid "map-key-many-to-many"
msgstr "\"Many-to-Many\""
#. Tag: programlisting
#: collection_mapping.xml:634
#, no-c-format
msgid ""
"<map-key-many-to-many\n"
" column=\"column_name\"\n"
" formula=\"any SQL expression\"\n"
" class=\"ClassName\"\n"
"/>"
msgstr ""
#. Tag: para
#: collection_mapping.xml:638
#, fuzzy, no-c-format
msgid ""
"<literal>column (optional): the name of the foreign key column for "
"the collection index values."
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:643
#, fuzzy, no-c-format
msgid ""
"<literal>formula (optional): a SQ formula used to evaluate the "
"foreign key of the map key."
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:648
#, fuzzy, no-c-format
msgid ""
"<literal>class (required): the entity class used as the map key."
msgstr ""
"<literal>class (erforderlich): Der Name der zugehörigen Klasse."
#. Tag: title
#: collection_mapping.xml:658
#, fuzzy, no-c-format
msgid "Collections of basic types and embeddable objects"
msgstr "Collections von Werten und \"Many-to-Many\"-Assoziationen"
#. Tag: para
#: collection_mapping.xml:660
#, no-c-format
msgid ""
"In some situations you don't need to associate two entities but simply "
"create a collection of basic types or embeddable objects. Use the "
"<classname>@ElementCollection for this case."
msgstr ""
#. Tag: title
#: collection_mapping.xml:665
#, no-c-format
msgid ""
"Collection of basic types mapped via <classname>@ElementCollection annotation. If omitted the "
"collection table name defaults to the concatenation of the name of the "
"containing entity and the name of the collection attribute, separated by an "
"underscore. In our example, it would be <literal>User_nicknames."
msgstr ""
#. Tag: para
#: collection_mapping.xml:678
#, no-c-format
msgid ""
"The column holding the basic type is set using the <classname>@Column."
msgstr ""
#. Tag: para
#: collection_mapping.xml:683
#, no-c-format
msgid ""
"But you are not limited to basic types, the collection type can be any "
"embeddable object. To override the columns of the embeddable object in the "
"collection table, use the <classname>@AttributeOverride "
"annotation."
msgstr ""
#. Tag: title
#: collection_mapping.xml:689
#, no-c-format
msgid "@ElementCollection for embeddable objects"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:691
#, no-c-format
msgid ""
"@Entity\n"
"public class User {\n"
" [...]\n"
" public String getLastname() { ...}\n"
"\n"
" @ElementCollection\n"
" @CollectionTable(name=\"Addresses\", joinColumns=@JoinColumn(name="
"\"user_id\"))\n"
" @AttributeOverrides({\n"
" @AttributeOverride(name=\"street1\", column=@Column(name=\"fld_street"
"\"))\n"
" })\n"
" public Set<Address> getAddresses() { ... } \n"
"}\n"
"\n"
"@Embeddable\n"
"public class Address {\n"
" public String getStreet1() {...}\n"
" [...]\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:694
#, no-c-format
msgid "Such an embeddable object cannot contains a collection itself."
msgstr ""
#. Tag: para
#: collection_mapping.xml:698
#, no-c-format
msgid ""
"in <classname>@AttributeOverride, you must use the "
"<literal>value. prefix to override properties of the embeddable "
"object used in the map value and the <literal>key. prefix to "
"override properties of the embeddable object used in the map key."
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:704
#, no-c-format
msgid ""
"@Entity\n"
"public class User {\n"
" @ElementCollection\n"
" @AttributeOverrides({\n"
" @AttributeOverride(name=\"key.street1\", column=@Column(name="
"\"fld_street\")),\n"
" @AttributeOverride(name=\"value.stars\", column=@Column(name=\"fld_note"
"\"))\n"
" })\n"
" public Map<Address,Rating> getFavHomes() { ... }"
msgstr ""
#. Tag: para
#: collection_mapping.xml:708
#, no-c-format
msgid ""
"We recommend you to migrate from <classname>@org.hibernate.annotations."
"CollectionOfElements</classname> to the new @ElementCollection tag. For example:"
msgstr ""
"Für eine Collection von Werten wird das <literal><element>-"
"Tag verwendet."
#. Tag: title
#: collection_mapping.xml:718
#, no-c-format
msgid "<element> tag for collection values using mapping files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:730
#, no-c-format
msgid ""
"<element\n"
" column=\"column_name\"\n"
" formula=\"any SQL expression\"\n"
" type=\"typename\"\n"
" length=\"L\"\n"
" precision=\"P\"\n"
" scale=\"S\"\n"
" not-null=\"true|false\"\n"
" unique=\"true|false\"\n"
" node=\"element-name\"\n"
"/>"
msgstr ""
#. Tag: para
#: collection_mapping.xml:734
#, fuzzy, no-c-format
msgid ""
"<literal>column (optional): the name of the column holding the "
"collection element values."
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:739
#, fuzzy, no-c-format
msgid ""
"<literal>formula (optional): an SQL formula used to evaluate the "
"element."
msgstr ""
"<literal>schema (optional) der Name eines Tabellenschemas, der das "
"im Stammelement deklarierte Schema außer Kraft setzt"
#. Tag: para
#: collection_mapping.xml:744
#, fuzzy, no-c-format
msgid "<literal>type (required): the type of the collection element."
msgstr ""
"<literal>class (erforderlich): Der Name der zugehörigen Klasse."
#. Tag: title
#: collection_mapping.xml:754
#, no-c-format
msgid "Advanced collection mappings"
msgstr "Fortgeschrittene Collection-Mappings"
#. Tag: title
#: collection_mapping.xml:757
#, no-c-format
msgid "Sorted collections"
msgstr "Sortierte Collections"
#. Tag: para
#: collection_mapping.xml:759
#, no-c-format
msgid ""
"Hibernate supports collections implementing <literal>java.util.SortedMapjava.util.SortedSet. With annotations you "
"declare a sort comparator using <literal>@Sort. You chose between "
"the comparator types unsorted, natural or custom. If you want to use your "
"own comparator implementation, you'll also have to specify the "
"implementation class using the <literal>comparator attribute. Note "
"that you need to use either a <classname>SortedSet or a "
"<classname>SortedMap interface."
msgstr ""
#. Tag: title
#: collection_mapping.xml:770
#, fuzzy, no-c-format
msgid "Sorted collection with @Sort"
msgstr "Sortierte Collections"
#. Tag: programlisting
#: collection_mapping.xml:772
#, no-c-format
msgid ""
"@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)\n"
"@JoinColumn(name=\"CUST_ID\")\n"
"@Sort(type = SortType.COMPARATOR, comparator = TicketComparator.class)\n"
"public SortedSet<Ticket> getTickets() {\n"
" return tickets;\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:775
#, no-c-format
msgid ""
"Using Hibernate mapping files you specify a comparator in the mapping file "
"with <literal><sort>:"
msgstr ""
#. Tag: title
#: collection_mapping.xml:779
#, fuzzy, no-c-format
msgid "Sorted collection using xml mapping"
msgstr "Sortierte Collections"
#. Tag: programlisting
#: collection_mapping.xml:781
#, fuzzy, no-c-format
msgid ""
"<set name=\"aliases\"\n"
" table=\"person_aliases\" \n"
" sort=\"natural\">\n"
" <key column=\"person\"/>\n"
" <element column=\"name\" type=\"string\"/>\n"
"</set>\n"
"\n"
"<map name=\"holidays\" sort=\"my.custom.HolidayComparator\">\n"
" <key column=\"year_id\"/>\n"
" <map-key column=\"hol_name\" type=\"string\"/>\n"
" <element column=\"hol_date\" type=\"date\"/>\n"
"</map>"
msgstr ""
"<set name=\"aliases\" \n"
" table=\"person_aliases\" \n"
" sort=\"natural\">\n"
" <key column=\"person\"/>\n"
" <element column=\"name\" type=\"string\"/>\n"
"</set>\n"
"\n"
"<map name=\"holidays\" sort=\"my.custom.HolidayComparator\">\n"
" <key column=\"year_id\"/>\n"
" <map-key column=\"hol_name\" type=\"string\"/>\n"
" <element column=\"hol_date\" type=\"date\"/>\n"
"</map>"
#. Tag: para
#: collection_mapping.xml:784
#, no-c-format
msgid ""
"Allowed values of the <literal>sort attribute are "
"<literal>unsorted, natural and the name of a "
"class implementing <literal>java.util.Comparator."
msgstr ""
"Erlaubte Werte für das <literal>sort-Attribut sind "
"<literal>unsorted, natural und der Name einer "
"Klassenimplementierung <literal>java.util.Comparator."
#. Tag: para
#: collection_mapping.xml:789
#, no-c-format
msgid ""
"Sorted collections actually behave like <literal>java.util.TreeSet "
"or <literal>java.util.TreeMap."
msgstr ""
"Sortierte Collections verhalten sich tatsächlich wie <literal>java.util."
"TreeSet</literal> oder java.util.TreeMap."
#. Tag: para
#: collection_mapping.xml:794
#, fuzzy, no-c-format
msgid ""
"If you want the database itself to order the collection elements, use the "
"<literal>order-by attribute of set, "
"<literal>bag or map mappings. This solution is "
"implemented using <literal>LinkedHashSet or "
"<literal>LinkedHashMap and performs the ordering in the SQL query "
"and not in the memory."
msgstr ""
"Falls Sie wollen, dass die Datenbank selbst die Elemente der Collection "
"ordnet, verwenden Sie das <literal>order-by-Attribut von "
"<literal>set, bag oder map-"
"Mappings. Diese Lösung ist nur bei JDK 1.4 oder späteren Versionen verfügbar "
"(sie wird unter <literal>LinkedHashSet oder "
"<literal>LinkedHashMap implementiert). Dadurch wird die Anordnung "
"in der SQL-Anfrage - nicht im Speicher - durchgeführt."
#. Tag: title
#: collection_mapping.xml:802
#, no-c-format
msgid "Sorting in database using order-by"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:804
#, fuzzy, no-c-format
msgid ""
"<set name=\"aliases\" table=\"person_aliases\" order-by=\"lower(name) asc"
"\">\n"
" <key column=\"person\"/>\n"
" <element column=\"name\" type=\"string\"/>\n"
"</set>\n"
"\n"
"<map name=\"holidays\" order-by=\"hol_date, hol_name\">\n"
" <key column=\"year_id\"/>\n"
" <map-key column=\"hol_name\" type=\"string\"/>\n"
" <element column=\"hol_date type=\"date\"/>\n"
"</map>"
msgstr ""
"<set name=\"aliases\" table=\"person_aliases\" order-by=\"lower(name) asc"
"\">\n"
" <key column=\"person\"/>\n"
" <element column=\"name\" type=\"string\"/>\n"
"</set>\n"
"\n"
"<map name=\"holidays\" order-by=\"hol_date, hol_name\">\n"
" <key column=\"year_id\"/>\n"
" <map-key column=\"hol_name\" type=\"string\"/>\n"
" <element column=\"hol_date type=\"date\"/>\n"
"</map>"
#. Tag: title
#: collection_mapping.xml:808
#, no-c-format
msgid "Note"
msgstr ""
#. Tag: para
#: collection_mapping.xml:810
#, fuzzy, no-c-format
msgid ""
"The value of the <literal>order-by attribute is an SQL ordering, "
"not an HQL ordering."
msgstr ""
"Beachten Sie, dass der Wert des <literal>order-by-Attributs eine "
"SQL-Anordnung, keine HQL-Anordnung ist!"
#. Tag: para
#: collection_mapping.xml:814
#, fuzzy, no-c-format
msgid ""
"Associations can even be sorted by arbitrary criteria at runtime using a "
"collection <literal>filter():"
msgstr ""
"Assoziationen können zur Runtime mittels Collection <literal>filter() allows navigation from both "
"\"ends\" of the association. Two kinds of bidirectional association are "
"supported:"
msgstr ""
"Eine <emphasis>bidirektionale Assoziation erlaubt die Navigation "
"von beiden \"Enden\" der Assoziation. Es werden zwei Arten bidirektionaler "
"Assoziationen unterstützt:"
#. Tag: term
#: collection_mapping.xml:831
#, no-c-format
msgid "one-to-many"
msgstr "\"One-to-Many\""
#. Tag: para
#: collection_mapping.xml:834
#, fuzzy, no-c-format
msgid "set or bag valued at one end and single-valued at the other"
msgstr ""
"an einem Ende von \"Set\"- oder \"Bag\"-wertig, am anderen Ende einwertig"
#. Tag: term
#: collection_mapping.xml:840
#, no-c-format
msgid "many-to-many"
msgstr "\"Many-to-Many\""
#. Tag: para
#: collection_mapping.xml:843
#, no-c-format
msgid "set or bag valued at both ends"
msgstr "an beiden Enden \"Set\"- oder \"Bag\"-wertig"
#. Tag: para
#: collection_mapping.xml:848
#, no-c-format
msgid ""
"Often there exists a many to one association which is the owner side of a "
"bidirectional relationship. The corresponding one to many association is in "
"this case annotated by <literal>@OneToMany(mappedBy=...)"
msgstr ""
#. Tag: title
#: collection_mapping.xml:854
#, no-c-format
msgid "Bidirectional one to many with many to one side as association owner"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:857
#, no-c-format
msgid ""
"@Entity\n"
"public class Troop {\n"
" @OneToMany(mappedBy=\"troop\")\n"
" public Set<Soldier> getSoldiers() {\n"
" ...\n"
"}\n"
"\n"
"@Entity\n"
"public class Soldier {\n"
" @ManyToOne\n"
" @JoinColumn(name=\"troop_fk\")\n"
" public Troop getTroop() {\n"
" ...\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:860
#, no-c-format
msgid ""
"<classname>Troop has a bidirectional one to many relationship "
"with <literal>Soldier through the troop "
"property. You don't have to (must not) define any physical mapping in the "
"<literal>mappedBy side."
msgstr ""
#. Tag: para
#: collection_mapping.xml:865
#, no-c-format
msgid ""
"To map a bidirectional one to many, with the one-to-many side as the owning "
"side, you have to remove the <literal>mappedBy element and set the "
"many to one <literal>@JoinColumn as insertable and updatable to "
"false. This solution is not optimized and will produce additional UPDATE "
"statements."
msgstr ""
#. Tag: title
#: collection_mapping.xml:872
#, fuzzy, no-c-format
msgid "Bidirectional associtaion with one to many side as owner"
msgstr "Bidirektionale Assoziationen mit indizierten Collections"
#. Tag: programlisting
#: collection_mapping.xml:875
#, no-c-format
msgid ""
"@Entity\n"
"public class Troop {\n"
" @OneToMany\n"
" @JoinColumn(name=\"troop_fk\") //we need to duplicate the physical "
"information\n"
" public Set<Soldier> getSoldiers() {\n"
" ...\n"
"}\n"
"\n"
"@Entity\n"
"public class Soldier {\n"
" @ManyToOne\n"
" @JoinColumn(name=\"troop_fk\", insertable=false, updatable=false)\n"
" public Troop getTroop() {\n"
" ...\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:878
#, fuzzy, no-c-format
msgid ""
"How does the mappping of a bidirectional mapping look like in Hibernate "
"mapping xml? There you define a bidirectional one-to-many association by "
"mapping a one-to-many association to the same table column(s) as a many-to-"
"one association and declaring the many-valued end <literal>inverse=\"true\" deklarieren."
#. Tag: title
#: collection_mapping.xml:885
#, no-c-format
msgid "Bidirectional one to many via Hibernate mapping files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:887
#, fuzzy, no-c-format
msgid ""
"<class name=\"Parent\">\n"
" <id name=\"id\" column=\"parent_id\"/>\n"
" ....\n"
" <set name=\"children\" inverse=\"true\">\n"
" <key column=\"parent_id\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
"</class>\n"
"\n"
"<class name=\"Child\">\n"
" <id name=\"id\" column=\"child_id\"/>\n"
" ....\n"
" <many-to-one name=\"parent\" \n"
" class=\"Parent\" \n"
" column=\"parent_id\"\n"
" not-null=\"true\"/>\n"
"</class>"
msgstr ""
"<class name=\"Parent\">\n"
" <id name=\"id\" column=\"parent_id\"/>\n"
" ....\n"
" <set name=\"children\" inverse=\"true\">\n"
" <key column=\"parent_id\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
"</class>\n"
"\n"
"<class name=\"Child\">\n"
" <id name=\"id\" column=\"child_id\"/>\n"
" ....\n"
" <many-to-one name=\"parent\" \n"
" class=\"Parent\" \n"
" column=\"parent_id\"\n"
" not-null=\"true\"/>\n"
"</class>"
#. Tag: para
#: collection_mapping.xml:890
#, fuzzy, no-c-format
msgid ""
"Mapping one end of an association with <literal>inverse=\"true\" "
"does not affect the operation of cascades as these are orthogonal concepts."
msgstr ""
"Das Mappen eines der Enden einer Assoziation mit <literal>inverse=\"true\" annotation. You also have to describe the "
"association table and the join conditions using the <literal>@JoinTable defines a name primary key (the \"other side\"). As seen "
"previously, the other side don't have to (must not) describe the physical "
"mapping: a simple <literal>mappedBy argument containing the owner "
"side property name bind the two."
msgstr ""
#. Tag: para
#: collection_mapping.xml:919
#, no-c-format
msgid ""
"As any other annotations, most values are guessed in a many to many "
"relationship. Without describing any physical mapping in a unidirectional "
"many to many the following rules applied. The table name is the "
"concatenation of the owner table name, <keycap>_ and the other side "
"table name. The foreign key name(s) referencing the owner table is the "
"concatenation of the owner table name, <keycap>_ and the owner "
"primary key column(s). The foreign key name(s) referencing the other side is "
"the concatenation of the owner property name, <keycap>_, and the "
"other side primary key column(s). These are the same rules used for a "
"unidirectional one to many relationship."
msgstr ""
#. Tag: title
#: collection_mapping.xml:932
#, no-c-format
msgid "Default values for <classname>@ManyToMany (uni-directional)"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:935
#, no-c-format
msgid ""
"@Entity\n"
"public class Store {\n"
" @ManyToMany(cascade = CascadeType.PERSIST)\n"
" public Set<City> getImplantedIn() {\n"
" ...\n"
" }\n"
"}\n"
"\n"
"@Entity\n"
"public class City {\n"
" ... //no bidirectional relationship\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:938
#, no-c-format
msgid ""
"A <literal>Store_City is used as the join table. The "
"<literal>Store_id column is a foreign key to the StoreimplantedIn_id column is a foreign "
"key to the <literal>City table."
msgstr ""
#. Tag: para
#: collection_mapping.xml:943
#, no-c-format
msgid ""
"Without describing any physical mapping in a bidirectional many to many the "
"following rules applied. The table name is the concatenation of the owner "
"table name, <keycap>_ and the other side table name. The foreign "
"key name(s) referencing the owner table is the concatenation of the other "
"side property name, <keycap>_, and the owner primary key column(s). "
"The foreign key name(s) referencing the other side is the concatenation of "
"the owner property name, <keycap>_, and the other side primary key "
"column(s). These are the same rules used for a unidirectional one to many "
"relationship."
msgstr ""
#. Tag: title
#: collection_mapping.xml:955
#, no-c-format
msgid "Default values for <classname>@ManyToMany (bi-directional)"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:958
#, no-c-format
msgid ""
"@Entity\n"
"public class Store {\n"
" @ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE})\n"
" public Set<Customer> getCustomers() {\n"
" ...\n"
" }\n"
"}\n"
"\n"
"@Entity\n"
"public class Customer {\n"
" @ManyToMany(mappedBy=\"customers\")\n"
" public Set<Store> getStores() {\n"
" ...\n"
" }\n"
"}"
msgstr ""
#. Tag: para
#: collection_mapping.xml:961
#, no-c-format
msgid ""
"A <literal>Store_Customer is used as the join table. The "
"<literal>stores_id column is a foreign key to the Storecustomers_id column is a foreign key "
"to the <literal>Customer table."
msgstr ""
#. Tag: para
#: collection_mapping.xml:966
#, fuzzy, no-c-format
msgid ""
"Using Hibernate mapping files you can map a bidirectional many-to-many "
"association by mapping two many-to-many associations to the same database "
"table and declaring one end as <emphasis>inverse."
msgstr ""
"Sie können eine bidirektionale \"Many-to-Many\"-Assoziation ganz einfach "
"festlegen, indem Sie zwei \"Many-to-Many\"-Assoziationen zur selben "
"Datenbanktabelle mappen und ein Ende als <emphasis>invertiert "
"deklarieren (welches bleibt Ihnen überlassen, es kann jedoch keine "
"indizierte Collection sein)."
#. Tag: para
#: collection_mapping.xml:970
#, no-c-format
msgid "You cannot select an indexed collection."
msgstr ""
#. Tag: para
#: collection_mapping.xml:973
#, fuzzy, no-c-format
msgid ""
"shows a bidirectional many-to-many association that illustrates how each "
"category can have many items and each item can be in many categories:"
msgstr ""
"Nachfolgend sehen Sie ein Beispiel für eine bidirektionale \"Many-to-Many\"-"
"Assoziation. Jede Kategorie kann viele Posten besitzen und jeder Posten kann "
"sich in vielen Kategorien befinden:"
#. Tag: title
#: collection_mapping.xml:979
#, no-c-format
msgid "Many to many association using Hibernate mapping files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:981
#, fuzzy, no-c-format
msgid ""
"<class name=\"Category\">\n"
" <id name=\"id\" column=\"CATEGORY_ID\"/>\n"
" ...\n"
" <bag name=\"items\" table=\"CATEGORY_ITEM\">\n"
" <key column=\"CATEGORY_ID\"/>\n"
" <many-to-many class=\"Item\" column=\"ITEM_ID\"/>\n"
" </bag>\n"
"</class>\n"
"\n"
"<class name=\"Item\">\n"
" <id name=\"id\" column=\"ITEM_ID\"/>\n"
" ...\n"
"\n"
" <!-- inverse end -->\n"
" <bag name=\"categories\" table=\"CATEGORY_ITEM\" inverse=\"true"
"\">\n"
" <key column=\"ITEM_ID\"/>\n"
" <many-to-many class=\"Category\" column=\"CATEGORY_ID\"/>\n"
" </bag>\n"
"</class>"
msgstr ""
"<class name=\"Category\">\n"
" <id name=\"id\" column=\"CATEGORY_ID\"/>\n"
" ...\n"
" <bag name=\"items\" table=\"CATEGORY_ITEM\">\n"
" <key column=\"CATEGORY_ID\"/>\n"
" <many-to-many class=\"Item\" column=\"ITEM_ID\"/>\n"
" </bag>\n"
"</class>\n"
"\n"
"<class name=\"Item\">\n"
" <id name=\"id\" column=\"CATEGORY_ID\"/>\n"
" ...\n"
"\n"
" <!-- inverse end -->\n"
" <bag name=\"categories\" table=\"CATEGORY_ITEM\" inverse=\"true"
"\">\n"
" <key column=\"ITEM_ID\"/>\n"
" <many-to-many class=\"Category\" column=\"CATEGORY_ID\"/>\n"
" </bag>\n"
"</class>"
#. Tag: para
#: collection_mapping.xml:984
#, fuzzy, no-c-format
msgid ""
"Changes made only to the inverse end of the association are <emphasis>not persistiert. Das bedeutet, dass "
"Hibernate zwei Darstellungen jeder bidirektionalen Assoziation im Speicher "
"besitzt - eine Verbindung von A zu B und eine weitere Verbindung von B zu A. "
"Dies ist leichter zu verstehen, wenn man an das Objektmodell von Java denkt "
"und daran, wie in Java eine \"Many-to-Many\"-Beziehung erstellt wird:"
#. Tag: title
#: collection_mapping.xml:992
#, fuzzy, no-c-format
msgid "Effect of inverse vs. non-inverse side of many to many associations"
msgstr "Collections von Werten und \"Many-to-Many\"-Assoziationen"
#. Tag: programlisting
#: collection_mapping.xml:995
#, fuzzy, no-c-format
msgid ""
"category.getItems().add(item); // The category now \"knows\" about "
"the relationship\n"
"item.getCategories().add(category); // The item now \"knows\" about the "
"relationship\n"
"\n"
"session.persist(item); // The relationship won't be "
"saved!\n"
"session.persist(category); // The relationship will be saved"
msgstr ""
"category.getItems().add(item); // The category now \"knows\" about "
"the relationship\n"
"item.getCategories().add(category); // The item now \"knows\" about the "
"relationship\n"
"\n"
"session.persist(item); // The relationship won't be "
"saved!\n"
"session.persist(category); // The relationship will be saved"
#. Tag: para
#: collection_mapping.xml:998
#, no-c-format
msgid ""
"The non-inverse side is used to save the in-memory representation to the "
"database."
msgstr ""
"Die nicht-invertierte Seite wird dazu benutzt, die gespeicherte Darstellung "
"in der Datenbank zu speichern."
#. Tag: title
#: collection_mapping.xml:1003
#, no-c-format
msgid "Bidirectional associations with indexed collections"
msgstr "Bidirektionale Assoziationen mit indizierten Collections"
#. Tag: para
#: collection_mapping.xml:1005
#, fuzzy, no-c-format
msgid ""
"There are some additional considerations for bidirectional mappings with "
"indexed collections (where one end is represented as a <literal><list>"
"</literal> or <map>) when using Hibernate mapping "
"files. If there is a property of the child class that maps to the index "
"column you can use <literal>inverse=\"true\" on the collection "
"mapping:"
msgstr ""
"Eine bidirektionale Assoziation, bei der ein Ende als <literal><list><map> dargestellt ist, erfordert "
"besondere Beachtung. Falls eine Property der untergeordneten Klasse (sog. "
"\"child class\") existiert, die zur Indexspalte mappt, dann gibt es keine "
"Probleme und wir können mit der Verwendung von <literal>inverse=\"true\". "
"Instead, you could use the following mapping:"
msgstr ""
"Falls aber an der untergeordneten Klasse keine solche Property vorhanden "
"ist, so kann man sich die Assoziation nicht als wahrhaft bidirektional "
"vorstellen (es sind Informationen an einem Ende vorhanden, die am anderen "
"Ende nicht verfügbar sind). In diesem Fall können wir die Collection nicht "
"<literal>inverse=\"true\" mappen. Statt dessen empfehlen wir "
"folgendes Mapping:"
#. Tag: title
#: collection_mapping.xml:1026
#, fuzzy, no-c-format
msgid "Bidirectional association with indexed collection, but no index column"
msgstr "Bidirektionale Assoziationen mit indizierten Collections"
#. Tag: programlisting
#: collection_mapping.xml:1029
#, fuzzy, no-c-format
msgid ""
"<class name=\"Parent\">\n"
" <id name=\"id\" column=\"parent_id\"/>\n"
" ....\n"
" <map name=\"children\">\n"
" <key column=\"parent_id\"\n"
" not-null=\"true\"/>\n"
" <map-key column=\"name\" \n"
" type=\"string\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </map>\n"
"</class>\n"
"\n"
"<class name=\"Child\">\n"
" <id name=\"id\" column=\"child_id\"/>\n"
" ....\n"
" <many-to-one name=\"parent\" \n"
" class=\"Parent\" \n"
" column=\"parent_id\"\n"
" insert=\"false\"\n"
" update=\"false\"\n"
" not-null=\"true\"/>\n"
"</class>"
msgstr ""
"<class name=\"Parent\">\n"
" <id name=\"id\" column=\"parent_id\"/>\n"
" ....\n"
" <map name=\"children\">\n"
" <key column=\"parent_id\"\n"
" not-null=\"true\"/>\n"
" <map-key column=\"name\" \n"
" type=\"string\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </map>\n"
"</class>\n"
"\n"
"<class name=\"Child\">\n"
" <id name=\"id\" column=\"child_id\"/>\n"
" ....\n"
" <many-to-one name=\"parent\" \n"
" class=\"Parent\" \n"
" column=\"parent_id\"\n"
" insert=\"false\"\n"
" update=\"false\"\n"
" not-null=\"true\"/>\n"
"</class>"
#. Tag: para
#: collection_mapping.xml:1032
#, fuzzy, no-c-format
msgid ""
"Note that in this mapping, the collection-valued end of the association is "
"responsible for updates to the foreign key."
msgstr ""
"Bitte beachten Sie, dass bei diesem Mapping das Collection-wertige Ende der "
"Assoziation für Aktualisierungen am Fremdschlüssel verantwortlich ist. TODO: "
"Führt dies zu unnötigen Aktualisierungsanweisungen? "
#. Tag: title
#: collection_mapping.xml:1037
#, no-c-format
msgid "Ternary associations"
msgstr "Dreifache Assoziationen"
#. Tag: para
#: collection_mapping.xml:1039
#, fuzzy, no-c-format
msgid ""
"There are three possible approaches to mapping a ternary association. One "
"approach is to use a <literal>Map with an association as its index:"
msgstr ""
"Es gibt drei mögliche Arten eine dreifache Assoziation zu mappen. Eine davon "
"ist die Verwendung von <literal>Map mit einer Assoziation als "
"deren Index:"
#. Tag: title
#: collection_mapping.xml:1044
#, fuzzy, no-c-format
msgid "Ternary association mapping"
msgstr "Dreifache Assoziationen"
#. Tag: programlisting
#: collection_mapping.xml:1046
#, no-c-format
msgid ""
"@Entity\n"
"public class Company {\n"
" @Id \n"
" int id;\n"
" ...\n"
" @OneToMany // unidirectional\n"
" @MapKeyJoinColumn(name=\"employee_id\")\n"
" Map<Employee, Contract> contracts;\n"
"}\n"
"\n"
"// or\n"
"\n"
"<map name=\"contracts\">\n"
" <key column=\"employer_id\" not-null=\"true\"/>\n"
" <map-key-many-to-many column=\"employee_id\" class=\"Employee\"/>\n"
" <one-to-many class=\"Contract\"/>\n"
"</map>"
msgstr ""
#. Tag: para
#: collection_mapping.xml:1049
#, fuzzy, no-c-format
msgid ""
"A second approach is to remodel the association as an entity class. This is "
"the most common approach. A final alternative is to use composite elements, "
"which will be discussed later."
msgstr ""
"Ein zweiter Weg ist es, die Assoziation einfach als eine Entity-Klasse zu "
"gestalten. Das ist die am häufigsten gewählte Herangehensweise."
#. Tag: literal
#: collection_mapping.xml:1055
#, fuzzy, no-c-format
msgid "Using an <idbag>"
msgstr "Die Verwendung einer <idbag>"
#. Tag: para
#: collection_mapping.xml:1057
#, fuzzy, no-c-format
msgid ""
"The majority of the many-to-many associations and collections of values "
"shown previously all map to tables with composite keys, even though it has "
"been suggested that entities should have synthetic identifiers (surrogate "
"keys). A pure association table does not seem to benefit much from a "
"surrogate key, although a collection of composite values <emphasis>might element lets you map a ListCollection) with bag semantics. For example:"
msgstr ""
"Das <literal><idbag>-Element lässt Sie eine ListCollection) mit \"Bag\"-Semantik mappen."
#. Tag: programlisting
#: collection_mapping.xml:1070
#, fuzzy, no-c-format
msgid ""
"<idbag name=\"lovers\" table=\"LOVERS\">\n"
" <collection-id column=\"ID\" type=\"long\">\n"
" <generator class=\"sequence\"/>\n"
" </collection-id>\n"
" <key column=\"PERSON1\"/>\n"
" <many-to-many column=\"PERSON2\" class=\"Person\" fetch=\"join\"/"
">\n"
"</idbag>"
msgstr ""
"<idbag name=\"lovers\" table=\"LOVERS\">\n"
" <collection-id column=\"ID\" type=\"long\">\n"
" <generator class=\"sequence\"/>\n"
" </collection-id>\n"
" <key column=\"PERSON1\"/>\n"
" <many-to-many column=\"PERSON2\" class=\"Person\" fetch=\"join\"/"
">\n"
"</idbag>"
#. Tag: para
#: collection_mapping.xml:1072
#, fuzzy, no-c-format
msgid ""
"An <literal><idbag> has a synthetic id generator, just like "
"an entity class. A different surrogate key is assigned to each collection "
"row. Hibernate does not, however, provide any mechanism for discovering the "
"surrogate key value of a particular row."
msgstr ""
"Wie Sie sehen hat <literal><idbag> einen synthetischen id-"
"Generator, ganz wie eine Entity-Klasse! Ein anderer Surrogatschlüssel wird "
"jeder Reihe der Collection zugeordnet. Hibernate bietet jedoch keinen "
"Mechanismus, um den Wert eines Surrogatschlüssels für eine bestimmte Reihe "
"herauszufinden."
#. Tag: para
#: collection_mapping.xml:1077
#, fuzzy, no-c-format
msgid ""
"The update performance of an <literal><idbag> supersedes a "
"regular <literal><bag>. Hibernate can locate individual rows "
"efficiently and update or delete them individually, similar to a list, map "
"or set."
msgstr ""
"Beachten Sie, dass die Aktualiserungsperformance einer <literal><idbag>"
"</literal> wesentlich besser als eine reguläre "
"<literal><bag> ist! Hibernate kann auf effiziente Weise "
"einzelne Reihen lokalisieren und sie individuell aktualisieren oder löschen, "
"ganz wie bei einer Liste, einer Map oder einem Set."
#. Tag: para
#: collection_mapping.xml:1082
#, no-c-format
msgid ""
"In the current implementation, the <literal>native identifier "
"generation strategy is not supported for <literal><idbag> "
"collection identifiers."
msgstr ""
"In der aktuellen Implementierung wird die <literal>native "
"Bezeichnergenerierungsstrategie nicht für <literal><idbag> "
"Collection-Bezeichner unterstützt."
#. Tag: title
#: collection_mapping.xml:1103
#, no-c-format
msgid "Collection examples"
msgstr "Collection-Beispiele"
#. Tag: para
#: collection_mapping.xml:1105
#, fuzzy, no-c-format
msgid "This section covers collection examples."
msgstr "Collection-Beispiele"
#. Tag: para
#: collection_mapping.xml:1107
#, fuzzy, no-c-format
msgid ""
"The following class has a collection of <literal>Child instances:"
msgstr ""
"Der folgende Code würde verwendet, um ein neues <literal>Child "
"hinzuzufügen"
#. Tag: title
#: collection_mapping.xml:1111
#, no-c-format
msgid ""
"Example classes <classname>Parent and Child-Instanzen. Wenn jedes "
"\"child\" (untergeordnet) höchstens einen \"parent\" (übergeordnet) besitzt, "
"so ist das natürlichste Mapping eine \"One-to-Many\"-Assoziation:"
#. Tag: title
#: collection_mapping.xml:1121
#, no-c-format
msgid ""
"One to many unidirectional <classname>Parent-Child relationship "
"using annotations"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1124
#, no-c-format
msgid ""
"public class Parent {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
"\n"
" @OneToMany\n"
" private Set<Child> children;\n"
"\n"
" // getter/setter\n"
" ...\n"
"}\n"
"\n"
"\n"
"public class Child {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
" private String name;\n"
"\n"
" \n"
" // getter/setter\n"
" ...\n"
"}"
msgstr ""
#. Tag: title
#: collection_mapping.xml:1128
#, no-c-format
msgid ""
"One to many unidirectional <classname>Parent-Child relationship "
"using mapping files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1131
#, fuzzy, no-c-format
msgid ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\">\n"
" <key column=\"parent_id\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
msgstr ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\">\n"
" <key column=\"parent_id\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
#. Tag: para
#: collection_mapping.xml:1134
#, no-c-format
msgid "This maps to the following table definitions:"
msgstr "Das mappt zu den folgenden Tabellendefinitionen:"
#. Tag: title
#: collection_mapping.xml:1137
#, no-c-format
msgid ""
"Table definitions for unidirectional <classname>Parent-"
"<classname>Child relationship"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1141
#, fuzzy, no-c-format
msgid ""
"create table parent ( id bigint not null primary key )\n"
"create table child ( id bigint not null primary key, name varchar(255), "
"parent_id bigint )\n"
"alter table child add constraint childfk0 (parent_id) references parent"
msgstr ""
"create table parent ( id bigint not null primary key )\n"
"create table child ( id bigint not null primary key, name varchar(255), "
"parent_id bigint )\n"
"alter table child add constraint childfk0 (parent_id) references parent"
#. Tag: para
#: collection_mapping.xml:1144
#, no-c-format
msgid ""
"If the parent is <emphasis>required, use a bidirectional one-to-"
"many association:"
msgstr ""
"Falls der \"parent\" <emphasis>erforderlich ist, verwenden Sie "
"eine bidirektionale \"One-to-Many\"-Assoziation:"
#. Tag: title
#: collection_mapping.xml:1148
#, no-c-format
msgid ""
"One to many bidirectional <classname>Parent-Child relationship "
"using annotations"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1151
#, no-c-format
msgid ""
"public class Parent {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
"\n"
" @OneToMany(mappedBy=\"parent\")\n"
" private Set<Child> children;\n"
"\n"
" // getter/setter\n"
" ...\n"
"}\n"
"\n"
"\n"
"public class Child {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
"\n"
" private String name;\n"
" \n"
" @ManyToOne\n"
" private Parent parent;\n"
"\n"
" \n"
" // getter/setter\n"
" ...\n"
"}"
msgstr ""
#. Tag: title
#: collection_mapping.xml:1155
#, no-c-format
msgid ""
"One to many bidirectional <classname>Parent-Child relationship "
"using mapping files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1158
#, fuzzy, no-c-format
msgid ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\" inverse=\"true\">\n"
" <key column=\"parent_id\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" <many-to-one name=\"parent\" class=\"Parent\" column=\"parent_id"
"\" not-null=\"true\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
msgstr ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\" inverse=\"true\">\n"
" <key column=\"parent_id\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" <many-to-one name=\"parent\" class=\"Parent\" column=\"parent_id"
"\" not-null=\"true\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
#. Tag: para
#: collection_mapping.xml:1161
#, no-c-format
msgid "Notice the <literal>NOT NULL constraint:"
msgstr "Beachten Sie die <literal>NOT NULL-Bedingung:"
#. Tag: title
#: collection_mapping.xml:1164
#, no-c-format
msgid ""
"Table definitions for bidirectional <classname>Parent-"
"<classname>Child relationship"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1168
#, fuzzy, no-c-format
msgid ""
"create table parent ( id bigint not null primary key )\n"
"create table child ( id bigint not null\n"
" primary key,\n"
" name varchar(255),\n"
" parent_id bigint not null )\n"
"alter table child add constraint childfk0 (parent_id) references parent"
msgstr ""
"create table parent ( id bigint not null primary key )\n"
"create table child ( id bigint not null\n"
" primary key,\n"
" name varchar(255),\n"
" parent_id bigint not null )\n"
"alter table child add constraint childfk0 (parent_id) references parent"
#. Tag: para
#: collection_mapping.xml:1171
#, fuzzy, no-c-format
msgid ""
"Alternatively, if this association must be unidirectional you can enforce "
"the <literal>NOT NULL constraint."
msgstr ""
"Andernfalls - falls Sie absolut darauf bestehen, dass diese Assoziation "
"unidirektional ist - können Sie die <literal>NOT NULL-Bedingung am "
"<literal><key>-Mapping deklarieren:"
#. Tag: title
#: collection_mapping.xml:1175
#, no-c-format
msgid ""
"Enforcing NOT NULL constraint in unidirectional relation using annotations"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1178
#, no-c-format
msgid ""
"public class Parent {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
"\n"
" @OneToMany(optional=false)\n"
" private Set<Child> children;\n"
"\n"
" // getter/setter\n"
" ...\n"
"}\n"
"\n"
"\n"
"public class Child {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
" private String name;\n"
"\n"
" \n"
" // getter/setter\n"
" ...\n"
"}"
msgstr ""
#. Tag: title
#: collection_mapping.xml:1182
#, no-c-format
msgid ""
"Enforcing NOT NULL constraint in unidirectional relation using mapping files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1185
#, fuzzy, no-c-format
msgid ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\">\n"
" <key column=\"parent_id\" not-null=\"true\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
msgstr ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\">\n"
" <key column=\"parent_id\" not-null=\"true\"/>\n"
" <one-to-many class=\"Child\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
#. Tag: para
#: collection_mapping.xml:1188
#, fuzzy, no-c-format
msgid ""
"On the other hand, if a child has multiple parents, a many-to-many "
"association is appropriate."
msgstr ""
"Wenn jedoch ein \"child\" mehrere \"parents\" besitzen kann, ist die \"Many-"
"to-Many\"-Assoziation passender:"
#. Tag: title
#: collection_mapping.xml:1192
#, no-c-format
msgid ""
"Many to many <classname>Parent-Child relationship using "
"annotations"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1195
#, no-c-format
msgid ""
"public class Parent {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
"\n"
" @ManyToMany\n"
" private Set<Child> children;\n"
"\n"
" // getter/setter\n"
" ...\n"
"}\n"
"\n"
"\n"
"public class Child {\n"
" @Id\n"
" @GeneratedValue\n"
" private long id;\n"
"\n"
" private String name;\n"
"\n"
" \n"
" // getter/setter\n"
" ...\n"
"}"
msgstr ""
#. Tag: title
#: collection_mapping.xml:1199
#, no-c-format
msgid ""
"Many to many <classname>Parent-Child relationship using mapping "
"files"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1202
#, fuzzy, no-c-format
msgid ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\" table=\"childset\">\n"
" <key column=\"parent_id\"/>\n"
" <many-to-many class=\"Child\" column=\"child_id\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
msgstr ""
"<hibernate-mapping>\n"
"\n"
" <class name=\"Parent\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <set name=\"children\" table=\"childset\">\n"
" <key column=\"parent_id\"/>\n"
" <many-to-many class=\"Child\" column=\"child_id\"/>\n"
" </set>\n"
" </class>\n"
"\n"
" <class name=\"Child\">\n"
" <id name=\"id\">\n"
" <generator class=\"sequence\"/>\n"
" </id>\n"
" <property name=\"name\"/>\n"
" </class>\n"
"\n"
"</hibernate-mapping>"
#. Tag: para
#: collection_mapping.xml:1205
#, no-c-format
msgid "Table definitions:"
msgstr "Tabellendefinitionen:"
#. Tag: title
#: collection_mapping.xml:1208
#, no-c-format
msgid "Table definitions for many to many releationship"
msgstr ""
#. Tag: programlisting
#: collection_mapping.xml:1210
#, fuzzy, no-c-format
msgid ""
"create table parent ( id bigint not null primary key )\n"
"create table child ( id bigint not null primary key, name varchar(255) )\n"
"create table childset ( parent_id bigint not null,\n"
" child_id bigint not null,\n"
" primary key ( parent_id, child_id ) )\n"
"alter table childset add constraint childsetfk0 (parent_id) references "
"parent\n"
"alter table childset add constraint childsetfk1 (child_id) references child"
msgstr ""
"create table parent ( id bigint not null primary key )\n"
"create table child ( id bigint not null primary key, name varchar(255) )\n"
"create table childset ( parent_id bigint not null,\n"
" child_id bigint not null,\n"
" primary key ( parent_id, child_id ) )\n"
"alter table childset add constraint childsetfk0 (parent_id) references "
"parent\n"
"alter table childset add constraint childsetfk1 (child_id) references child"
#. Tag: para
#: collection_mapping.xml:1213
#, fuzzy, no-c-format
msgid ""
"For more examples and a complete explanation of a parent/child relationship "
"mapping, see <xref linkend=\"example-parentchild\"/> for more information. "
"Even more complex association mappings are covered in the next chapter."
msgstr ""
"Weitere Beispiele und eine vollständige Abhandlung des Mappings der \"parent/"
"child\"-Beziehung finden Sie unter <xref linkend=\"example-parentchild\"/>."
#, fuzzy
#~ msgid ""
#~ "Hibernate requires that persistent collection-valued fields be declared "
#~ "as an interface type. For example:"
#~ msgstr ""
#~ "In Hibernate müssen persistente Collection-wertige Felder als Interface-"
#~ "Typ deklariert werden, zum Beispiel:"
#~ msgid "Collection mappings"
#~ msgstr "Collection-Mappings"
#, fuzzy
#~ msgid ""
#~ "There are quite a range of mappings that can be generated for collections "
#~ "that cover many common relational models. We suggest you experiment with "
#~ "the schema generation tool so that you understand how various mapping "
#~ "declarations translate to database tables."
#~ msgstr ""
#~ "Es gibt eine ganze Reihe von Mappings, die für Collections generiert "
#~ "werden können und die zahlreiche gängige relationale Modelle abdecken. Es "
#~ "ist wahrscheinlich sinnvoll, wenn Sie mit dem Tool zur Schemagenerierung "
#~ "experimentieren, um zu sehen, wie die verschiedenen Mapping-Deklarationen "
#~ "bei Datenbanktabellen umgesetzt werden."
#~ msgid "Collection elements"
#~ msgstr "Collection-Elemente"
#~ msgid ""
#~ "The contained type is referred to as the <emphasis>collection element "
#~ "type</emphasis>. Collection elements are mapped by <"
#~ "element></literal> or <composite-element>, or "
#~ "in the case of entity references, with <literal><one-to-many><many-to-many>. The first two map "
#~ "elements with value semantics, the next two are used to map entity "
#~ "associations."
#~ msgstr ""
#~ "Der enthaltene Typ wird als <emphasis>Typ von Collection-Element<"
#~ "element></literal> oder <composite-element> - "
#~ "oder im Fall von Entity-Verweisen - durch <literal><one-to-many><many-to-many> gemappt. Die ersten "
#~ "beiden Elemente mappen mit Wertsemantik, die beiden folgenden werden für "
#~ "das Mappen von Entity-Assoziationen verwendet."
#, fuzzy
#~ msgid ""
#~ "All collection mappings, except those with set and bag semantics, need an "
#~ "<emphasis>index column in the collection table. An index "
#~ "column is a column that maps to an array index, or <literal>ListMap key. The index of a "
#~ "<literal>Map may be of any basic type, mapped with <"
#~ "map-key></literal>. It can be an entity reference mapped with "
#~ "<literal><map-key-many-to-many>, or it can be a composite "
#~ "type mapped with <literal><composite-map-key>. The index "
#~ "of an array or list is always of type <literal>integer and is "
#~ "mapped using the <literal><list-index> element. The "
#~ "mapped column contains sequential integers that are numbered from zero by "
#~ "default."
#~ msgstr ""
#~ "Alle Collection-Mappings - außer denen mit \"Set\"- und \"Bag\"-Semantik "
#~ "- benötigen eine <emphasis>Indexspalte in der Collection-"
#~ "Tabelle. Es handelt sich dabei um eine Spalte, die zu einem Verzeichnis "
#~ "von Datenelementen, <literal>List-Verzeichnis oder "
#~ "<literal>Map-Schlüssel mappt. Der Index einer Map<map-key><map-key-many-to-"
#~ "many></literal> gemappter Entity-Verweis oder ein mit <"
#~ "composite-map-key></literal> gemappter zusammengesetzter Typ sein. Der "
#~ "Index eines Datenelements oder einer Liste ist immer vom Typ her "
#~ "<literal>integer und wird mittels <list-index> with a foreign key column "
#~ "or columns, <emphasis>collection element column or columns, "
#~ "and possibly an index column or columns."
#~ msgstr ""
#~ "Jede Collection von Werten oder \"Many-to-Many\"-Assoziation erfordert "
#~ "eine zugeordnete <emphasis>Collection-Tabelle mit einer oder "
#~ "mehreren Fremdschlüsselspalten, <emphasis>Collection-Element-Spalte(n) (optional): the name of the element foreign key "
#~ "column."
#~ msgstr ""
#~ "<literal>class (erforderlich): Der Name der zugehörigen Klasse."
#, fuzzy
#~ msgid ""
#~ "<literal>formula (optional): an SQL formula used to evaluate "
#~ "the element foreign key value."
#~ msgstr ""
#~ "<literal>schema (optional) der Name eines Tabellenschemas, der "
#~ "das im Stammelement deklarierte Schema außer Kraft setzt"
#, fuzzy
#~ msgid ""
#~ "<literal>not-found (optional - defaults to exception will treat a missing row as a null "
#~ "association."
#~ msgstr ""
#~ "<literal>not-found (optional - standardmäßig "
#~ "<literal>exception): Bestimmt, wie gespeicherte Bezeichner "
#~ "(sog. \"Identifier\"), die auf fehlende Reihen verweisen, behandelt "
#~ "werden. Mit <literal>ignore wird eine fehlende Reihe als Null-"
#~ "Assoziation angesehen."
#, fuzzy
#~ msgid ""
#~ "A bag containing integers with an iteration order determined by the "
#~ "<literal>order-by attribute:"
#~ msgstr ""
#~ "Eine ganze Zahlen enthaltende \"Bag\" (mit einer durch das <literal>order-"
#~ "by</literal>-Attribut bestimmten Reihenfolge):"
#, fuzzy
#~ msgid "An array of entities, in this case, a many-to-many association:"
#~ msgstr ""
#~ "Ein Datenelement von Entities - in diesem Fall eine \"Many-to-Many\"-"
#~ "Assoziation:"
#~ msgid "A map from string indices to dates:"
#~ msgstr "Eine Map von String-Indexen zu Daten:"
#, fuzzy
#~ msgid "A list of components (this is discussed in the next chapter):"
#~ msgstr ""
#~ "Eine List von Komponenten (wird im nachfolgenden Kapitel näher erläutert):"
#~ msgid "One-to-many associations"
#~ msgstr "\"One-to-Many\"-Assoziationen"
#, fuzzy
#~ msgid ""
#~ "A <emphasis>one-to-many association links the tables of two "
#~ "classes via a foreign key with no intervening collection table. This "
#~ "mapping loses certain semantics of normal Java collections:"
#~ msgstr ""
#~ "Eine <emphasis>\"One-to-Many\"-Assoziation verbindet die "
#~ "Tabellen zweier Klassen mittels des Fremdschlüssels ohne eine "
#~ "intervenierende Collection-Tabelle. Dieses Mapping verliert bestimmte "
#~ "Teile der Semantik regulärer Java-Collections:"
#, fuzzy
#~ msgid ""
#~ "The following example shows a map of <literal>Part entities by "
#~ "name, where <literal>partName is a persistent property of "
#~ "<literal>Part. Notice the use of a formula-based index:"
#~ msgstr ""
#~ "Dieses Beispiel zeigt die Map von <literal>Part-Entities nach "
#~ "Name (wobei <literal>partName eine persistente Property von "
#~ "<literal>Part) ist. Beachten Sie die Verwendung eines "
#~ "formelbasierten Index."
#~ msgid ""
#~ "Hibernate supports collections implementing <literal>java.util.SortedMapjava.util.SortedSet. You must specify a "
#~ "comparator in the mapping file:"
#~ msgstr ""
#~ "Hibernate unterstützt <literal>java.util.SortedMap und "
#~ "<literal>java.util.SortedSet implementierende Collections. Sie "
#~ "müssen ein Vergleichsprogramm in der Mapping-Datei bestimmen:"
#, fuzzy
#~ msgid ""
#~ "A final alternative is to use composite elements, which will be discussed "
#~ "later."
#~ msgstr ""
#~ "Die dritte und letzte Variante besteht in der Verwendung "
#~ "zusammengesetzter Elemente, auf die wir zu einem späteren Zeitpunkt näher "
#~ "eingehen werden."
#, fuzzy
#~ msgid ""
#~ "Even more complex association mappings are covered in the next chapter."
#~ msgstr ""
#~ "Es sind sogar noch weitaus exotischere Assoziations-Mappings möglich, die "
#~ "wir im nächsten Kapitel ausführen."
#, fuzzy
#~ msgid ""
#~ "<
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