Glassfish example source code file (MappingPolicy.java)
The Glassfish MappingPolicy.java source code/*
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/*
* MappingPolicy.java
*
* Created on Jan 14, 2003
*/
package com.sun.jdo.spi.persistence.generator.database;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeSet;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.sql.Types;
import org.glassfish.persistence.common.I18NHelper;
import com.sun.jdo.spi.persistence.utility.StringHelper;
import com.sun.jdo.spi.persistence.utility.logging.Logger;
import org.glassfish.persistence.common.database.DBVendorTypeHelper;
import org.glassfish.persistence.common.DatabaseConstants;
// XXX Capitalization of acronyms such as Jdbc vs. JDBC is inconsistent
// throught out this package.
/**
* Describes how Java classes and their fields are to be mapped to database
* tables and columns
*/
public class MappingPolicy implements Cloneable {
//
// The names of many properties in our .properties files are composed of
// different pieces, here called "bases", followed by "indicators". The
// idea is that a base may have multiple indicators. In a way, they are
// kind of like instances of structs, with each base naming an instance
// and each indicator naming an accessor to a value in the struct.
//
// The concatenation of bases and indicators is just another String,
// which you can look up in a Properties object to get a value.
//
// Note that some property names have more than one base concatenated.
// See SQL92.properties for examples.
//
/** @see DatabaseGenerationConstants#DOT */
static final char DOT = DatabaseGenerationConstants.DOT;
//
// Base names of properties which describe how class and field names are
// to be represented in a database.
//
/** Base name to denote a class. */
private static final String CLASS_BASE = "{class-name}"; //NOI18N
/** Base name to denote a field. */
private static final String FIELD_BASE = "{field-name}"; //NOI18N
/** Base name to denote a relationship field. */
private static final String RELATIONSHIP_BASE =
"{relationship-field-name}"; //NOI18N
/** Represents a '.' in a regular expression */
private static String REGEXP_DOT = "\\."; // NOI18N
/** Synonym for DatabaseGenerationConstants.INDICATOR_JDBC_PREFIX. */
private static final String INDICATOR_JDBC_PREFIX =
DatabaseGenerationConstants.INDICATOR_JDBC_PREFIX;
/**
* Base name to denote maximum length of a name in a database. We
* support different maximum lengths for table, column, and constraint
* names.
*/
private static final String INDICATOR_MAXIMUM_LENGTH =
DatabaseGenerationConstants.INDICATOR_MAXIMUM_LENGTH;
//
// Indicator names for properties which describe how class and field
// names are to be represented in a database.
//
/** Indicator that property is for a table name. */
private static final String INDICATOR_TABLE_NAME =
"table-name"; //NOI18N
/** Indicator that property is for a column name. */
private static final String INDICATOR_COLUMN_NAME =
"column-name"; //NOI18N
/** Indicator that property is for a join table name. */
private static final String INDICATOR_JOIN_TABLE_NAME =
"join-table-name"; //NOI18N
/** Indicator that property is for a constraint name. */
private static final String INDICATOR_CONSTRAINT_NAME =
"constraint-name"; //NOI18N
//
// These are complete property names composed of bases and indicators.
//
/** Prefix of properties that denote classes. */
private static final String CLASS_PREFIX =
CLASS_BASE + DOT;
/** Prefix of properties that denote classes. */
private static final String RELATIONSHIP_PREFIX =
CLASS_PREFIX + RELATIONSHIP_BASE + DOT;
/** Name of property that provides default field-to-column name mapping. */
private static final String DEFAULT_COLUMN_KEY =
CLASS_PREFIX + FIELD_BASE + DOT + INDICATOR_COLUMN_NAME;
/** Name of property that provides default jointable name mapping. */
private static final String DEFAULT_JOIN_TABLE_KEY =
RELATIONSHIP_PREFIX + INDICATOR_JOIN_TABLE_NAME;
/** Name of property that provides default constraint name mapping. */
private static final String DEFAULT_CONSTRAINT_KEY =
RELATIONSHIP_PREFIX + INDICATOR_CONSTRAINT_NAME;
/** Name of property that provides default class-to-table name mapping. */
private static final String DEFAULT_TABLE_KEY =
CLASS_PREFIX + INDICATOR_TABLE_NAME;
//
// Now, here are values of properties which indicate how table and column
// names are to be generated. I.e., in our .properties files, these are
// potential values for some property names composed of the above bases
// and indicators.
//
/** Property value indicating table name must be same as class name. */
private static final String TABLE_NAME_AS_CLASSNAME =
"{className}"; //NOI18N
/** Property value indicating table name must be upper case. */
private static final String TABLE_NAME_UPPERCASE =
TABLE_NAME_AS_CLASSNAME.toUpperCase();
/** Property value indicating table name must be uppercase and unique. */
private static final String TABLE_NAME_HASH_UPPERCASE =
"{HASH-CLASSNAME}"; //NOI18N
/** Property value indicating colum name must be same as field name. */
private static final String COLUMN_NAME_AS_FIELDNAME =
"{fieldName}"; //NOI18N
/** Property value indicating column name must be uppercase. */
private static final String COLUMN_NAME_UPPERCASE =
COLUMN_NAME_AS_FIELDNAME.toUpperCase();
/** Property value indicating join table name must be uppercase. */
private static final String JOIN_TABLE_NAME_UPPERCASE =
"{CLASSNAMES}"; //NOI18N
/** Property value indicating constraint name must be uppercase. */
private static final String CONSTRAINT_NAME_UPPERCASE =
"{FIELDNAMES}"; //NOI18N
//
// Here are indicators for properties that direct how vendor-dependent
// SQL is generated.
//
/** Indicator that property is for formatting SQL */
private static final String INDICATOR_SQL_FORMAT = "sql-format"; //NOI18N
/** The indicator for a statement separator. */
private static final String STATEMENT_SEPARATOR_INDICATOR =
"statementSeparator"; // NOI18N
/** The indicator for starting a "create table". */
private static final String CREATE_TABLE_START_INDICATOR =
"createTableStart"; // NOI18N
/** The indicator for ending a "create table". */
private static final String CREATE_TABLE_END_INDICATOR =
"createTableEnd"; // NOI18N
/** The indicator for "create index". Added for Symfoware support as */
/** indexes on primary keys are mandatory */
private static final String CREATE_INDEX_INDICATOR =
"createIndex"; // NOI18N
/** The indicator for starting a "drop table". */
private static final String DROP_TABLE_INDICATOR =
"dropTable"; // NOI18N
/** The indicator for "add constraint". */
private static final String ALTER_TABLE_ADD_CONSTRAINT_START_INDICATOR =
"alterTableAddConstraintStart"; // NOI18N
/** The indicator for "drop constraint". */
private static final String ALTER_TABLE_DROP_CONSTRAINT_INDICATOR =
"alterTableDropConstraint"; // NOI18N
/** The indicator for adding a primary key constraint. */
private static final String PRIMARY_KEY_CONSTRAINT_INDICATOR =
"primaryKeyConstraint"; // NOI18N
/** The indicator for adding a foreign key constraint. */
private static final String FOREIGN_KEY_CONSTRAINT_INDICATOR =
"foreignKeyConstraint"; // NOI18N
/** The indicator for verbose nullability. */
private static final String COLUMN_NULLABILITY_INDICATOR =
"columnNullability"; // NOI18N
/** The indicator for information used with LOB columns. */
private static final String LOB_LOGGING_INDICATOR =
"LOBLogging"; // NOI18N
//
// The remaining constants are neither bases nor indicators.
//
/** Prefix of column names which are primary key columns. */
private static final String PK_PREFIX = "PK_"; //NOI18N
/** Prefix of column names which are foreign key columns. */
private static final String FK_PREFIX = "FK_"; //NOI18N
/** Name of the "global" namespace. */
private static final String GLOBAL_NAMING_SPACE = "GLOBAL"; //NOI18N
/** Property name which indicates unique table names should be generated. */
public static final String USE_UNIQUE_TABLE_NAMES = "use-unique-table-names"; // NOI18N
/** Property name which indicates reserved words. */
private static final String RESERVED_WORDS = "reserved-words";// NOI18N
/** When appended to a reserved word, causes it to be not-reserved. */
private static final String RESERVED_WORD_UNRESERVER = "9"; // NOI18N
/**
* Maximum length of the counter used to create unique names with a
* numeric id. Note that this length includes a NAME_SEPARATOR, so that
* we allow for 3 digits total.
*/
private static final int MAX_LEN_COUNTER = 4;
/** Number of chars to change a reserved word into * unreserved. */
private static final int MAX_LEN_RESERVED = 1;
/**
* Name of subdirectory in which db vendor - specific properties files
* are located.
*/
private static final String PROPERTY_FILE_DIR =
"com/sun/jdo/spi/persistence/generator/database/"; // NOI18N
/** Extension used by properties files. */
private static final String PROPERTY_FILE_EXT = ".properties"; // NOI18N
//
// The above are all constants; below things get "interesting".
//
/** This is the set of all default properties. */
private static final Properties defaultProps = new Properties();
//
// XXX Consider getting these String-Integer and Integer-String maps into
// SQLTypeUtil, which is in the dbschema module. Or not: we support only a
// subset of java.sql.types, and (presumably) the dbschema module would
// provide mappings for all types.
//
// Note also that is code in MappingGenerator of a "SQLTypeUtil" nature.
//
/**
* Map from String names to the Integer-boxed values from
* java.sql.Types.
*/
private static final Map jdbcTypes = new HashMap();
/**
* Maps from Integer-boxed values from java.sql.Types to String names.
*/
private static final Map jdbcTypeNames = new HashMap();
/**
* Global counter for creating unique names in each of the namespaces.
* <em>Note that a single counter is used across all namespaces.
*/
private int counter = 0;
/**
* Map from namespaces to Set of names defined in each namespace. Used
* to ensure uniqueness within namespaces.
*/
private Map namespaces = new HashMap();
/**
* Indicates whether or not generated table names should include a
* unique value as part of their names.
*/
private boolean uniqueTableName = false;
/**
* Set of reserved words for a particular policy.
*/
private final Set reservedWords = new TreeSet();
/**
* Set of reserved words for the default database.
*/
private static Set defaultReservedWords;
/**
* Map from the string names of the java types (e.g. "java.lang.String")
* to a JDBCInfo of information about the corresponding java.sql.Types
* type. Different for different dbvendor types, but the same instance,
* per dbvendor, is shared by all MappingPolicy instances.
*/
private final Map dbJdbcInfoMap = new HashMap();
/**
* Similar to {@link #dbJdbcInfoMap}, but is reinitialized by each
* clone(). Contains user-provided overrides of the information in
* dbjdbcInfoMap.
*/
private Map userJdbcInfoMap = new HashMap();
/**
* Map from a boxed value based on fields in java.sql.Types to the String
* name of a SQL type.
*/
private final Map sqlInfo = new HashMap();
//
// Maximum lengths for table, column, and constraint names are
// vendor-specific.
//
/** Maximum length of the name of a table. */
private int tableNameMaxLength;
/** Maximum length of the name of a column. */
private int columnNameMaxLength;
/** Maximum length of the name of a constraint. */
private int constraintNameMaxLength;
//
// Strings to represent vendor-specific SQL that starts a table,
// separates statements, etc.
//
/** The SQL for a statement separator. */
private String statementSeparator;
/** The SQL for starting a "create table". */
private String createTableStart;
/** The SQL for ending a "create table". */
private String createTableEnd;
/** The SQL for "create index". */
private String createIndex;
/** The SQL for "drop table". */
private String dropTable;
/** The SQL for "add constraint". */
private String alterTableAddConstraintStart;
/** The SQL for "drop constraint". */
private String alterTableDropConstraint;
/** The SQL for adding a primary key constraint. */
private String primaryKeyConstraint;
/** The SQL for adding a foreign key constraint. */
private String foreignKeyConstraint;
/** The SQL for indicating column nullability */
private String columnNullability;
/** The SQL for indicating LOB column logging */
private String lobLogging = "";
/**
* Map from the encoded name of a policy to its value. For example, a
* class name's naming policy would be encoded as
* "<classname>.table-name".
*/
// XXX Consider renaming this.
private final Map namingPolicy = new HashMap();
/** Map from database vendor names to instances of MappingPolicy. */
private static final Map instances = new HashMap();
/** Logger for warning & error messages */
private static final Logger logger =
LogHelperDatabaseGenerator.getLogger();
/** I18N message handler */
private final static ResourceBundle messages =
I18NHelper.loadBundle(MappingPolicy.class);
//
// Initialize the JDBC String to Integer map and the default (SQL92)
// MappingPolicy.
//
// XXX Why initialize the SQL policy, when there's a good chance it won't
// ever be used? Do we really want to support unrecognized databases?
// See comment in getMappingPolicy. The default properties, on the other
// hand, *do* need to be loaded.
// XXX We need to decide what happens when an unrecognized dbvendorname
// is given: Error? Warning, continue running?
static {
// Initialize jdbcType map.
jdbcTypes.put("BIGINT", new Integer(Types.BIGINT)); // NOI18N
jdbcTypes.put("BIT", new Integer(Types.BIT)); // NOI18N
jdbcTypes.put("BLOB", new Integer(Types.BLOB)); // NOI18N
jdbcTypes.put("CHAR", new Integer(Types.CHAR)); // NOI18N
jdbcTypes.put("CLOB", new Integer(Types.CLOB)); // NOI18N
jdbcTypes.put("DATE", new Integer(Types.DATE)); // NOI18N
jdbcTypes.put("DECIMAL", new Integer(Types.DECIMAL)); // NOI18N
jdbcTypes.put("DOUBLE", new Integer(Types.DOUBLE)); // NOI18N
jdbcTypes.put("INTEGER", new Integer(Types.INTEGER)); // NOI18N
jdbcTypes.put("LONGVARBINARY", new Integer(Types.LONGVARBINARY)); // NOI18N
jdbcTypes.put("LONGVARCHAR", new Integer(Types.LONGVARCHAR)); // NOI18N
jdbcTypes.put("NULL", new Integer(Types.NULL)); // NOI18N
jdbcTypes.put("REAL", new Integer(Types.REAL)); // NOI18N
jdbcTypes.put("SMALLINT", new Integer(Types.SMALLINT)); // NOI18N
jdbcTypes.put("TIME", new Integer(Types.TIME)); // NOI18N
jdbcTypes.put("TIMESTAMP", new Integer(Types.TIMESTAMP)); // NOI18N
jdbcTypes.put("TINYINT", new Integer(Types.TINYINT)); // NOI18N
jdbcTypes.put("VARCHAR", new Integer(Types.VARCHAR)); // NOI18N
jdbcTypeNames.put(new Integer(Types.BIGINT), "BIGINT"); // NOI18N
jdbcTypeNames.put(new Integer(Types.BIT), "BIT"); // NOI18N
jdbcTypeNames.put(new Integer(Types.BLOB), "BLOB"); // NOI18N
jdbcTypeNames.put(new Integer(Types.CHAR), "CHAR"); // NOI18N
jdbcTypeNames.put(new Integer(Types.CLOB), "CLOB"); // NOI18N
jdbcTypeNames.put(new Integer(Types.DATE), "DATE"); // NOI18N
jdbcTypeNames.put(new Integer(Types.DECIMAL), "DECIMAL"); // NOI18N
jdbcTypeNames.put(new Integer(Types.DOUBLE), "DOUBLE"); // NOI18N
jdbcTypeNames.put(new Integer(Types.INTEGER), "INTEGER"); // NOI18N
jdbcTypeNames.put(new Integer(Types.LONGVARBINARY), "LONGVARBINARY"); // NOI18N
jdbcTypeNames.put(new Integer(Types.LONGVARCHAR), "LONGVARCHAR"); // NOI18N
jdbcTypeNames.put(new Integer(Types.NULL), "NULL"); // NOI18N
jdbcTypeNames.put(new Integer(Types.REAL), "REAL"); // NOI18N
jdbcTypeNames.put(new Integer(Types.SMALLINT), "SMALLINT"); // NOI18N
jdbcTypeNames.put(new Integer(Types.TIME), "TIME"); // NOI18N
jdbcTypeNames.put(new Integer(Types.TIMESTAMP), "TIMESTAMP"); // NOI18N
jdbcTypeNames.put(new Integer(Types.TINYINT), "TINYINT"); // NOI18N
jdbcTypeNames.put(new Integer(Types.VARCHAR), "VARCHAR"); // NOI18N
try {
// Create and load the default mapping policy.
new MappingPolicy();
} catch (Throwable ex) {
logger.log(Logger.SEVERE,
I18NHelper.getMessage(
messages,
"EXC_MappingPolicyNotFound", //NOI18N
DBVendorTypeHelper.DEFAULT_DB));
}
}
/**
* Create the default MappingPolicy instance.
*/
// This should be invoked only once per JVM. See the class static
// block of code above.
private MappingPolicy() throws IOException {
load(getPropertyFileName(DBVendorTypeHelper.DEFAULT_DB),
defaultProps, false);
init(defaultProps);
// The DEFAULT_DB has reserved words for the default database type.
// Other databases can access those same values through the
// defaultReservedWords set.
defaultReservedWords = reservedWords;
instances.put(DBVendorTypeHelper.DEFAULT_DB, this);
if (logger.isLoggable(Logger.FINEST)) {
logger.finest("new MappingPolicy():\n" + toString()); // NOI18N
}
}
/**
* Create a MappingPolicy for the named database type.
* @param databaseType Name of the database for which a MappingPolicy is
* created. The name must conform to one of the .properties files in
* this package.
*/
// This should be invoked only once per databaseType per JVM. See
// {@link #getMappingPolicy}.
private MappingPolicy(String databaseType) throws IOException {
Properties mergedProp = new Properties(defaultProps);
load(getPropertyFileName(databaseType), mergedProp, false);
init(mergedProp);
instances.put(databaseType, this);
if (logger.isLoggable(Logger.FINEST)) {
logger.finest("new MappingPolicy(" // NOI18N
+ databaseType + "):\n" + toString()); // NOI18N
}
}
/**
* Returns a vendor-specifc MappingPolicy instance. This method always
* returns a copy (clone) of the known MappingPolicy to allow for
* user-specific overrides.
* @param databaseType a database vendor name as a String.
* @return MappingPolicy instance corresponding to the provided
* database vendor name.
* @throws IOException if there are problems reading the vendor-
* specific mappinng policy file
*/
public synchronized static MappingPolicy getMappingPolicy(
String databaseType) throws IOException {
if (logger.isLoggable(Logger.FINE)) {
logger.fine("get MappingPolicy"+databaseType); // NOI18N
}
MappingPolicy mappingPolicy = null;
try {
if (databaseType == null) {
databaseType = DBVendorTypeHelper.DEFAULT_DB;
// XXX FIXME Need to log a warning and report to user that we
// are *not* using databaseType given, that we are using
// SQL92 instead, and provide list of recognized names.
}
mappingPolicy = (MappingPolicy) instances.get(databaseType);
if (mappingPolicy == null) {
mappingPolicy = new MappingPolicy(databaseType);
}
mappingPolicy = (MappingPolicy) mappingPolicy.clone();
} catch (CloneNotSupportedException ec) {
// ignore it because it will not happen
}
return mappingPolicy;
}
/**
* Clones the vendor-specific policy for generator session. Replace the
* namespaces map in the clone, so that each instance has its own.
* @return clone of this MappingPolicy
* @throws CloneNotSupportedException never thrown
*/
protected Object clone() throws CloneNotSupportedException {
MappingPolicy mappingPolicyClone = (MappingPolicy) super.clone();
mappingPolicyClone.namespaces = new HashMap();
mappingPolicyClone.uniqueTableName = false;
mappingPolicyClone.userJdbcInfoMap = new HashMap();
return mappingPolicyClone;
}
/**
* Initializes the given properties from the given resourceName.
* @param resourceName Name of the resource to open, expected to contain
* properties in text form.
* @param properties Properties that are to be loaded.
* @param override If <code>true, treat resourceName as a filename
* from which to read; if <code>false, treat resourceName as the
* name of a resource accessed via the class loader which loaded the
* MappingPolicy class.
*/
private synchronized void load(
final String resourceName, Properties properties, boolean override)
throws IOException {
if (logger.isLoggable(Logger.FINE)) {
logger.fine("load resource:" + resourceName); // NOI18N
}
InputStream bin = null;
InputStream in = null;
try {
if (override) {
in = new FileInputStream(resourceName);
} else {
final ClassLoader loader =
MappingPolicy.class.getClassLoader();
in = (InputStream) AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
Object rc = null;
if (loader != null) {
rc =loader.getResourceAsStream(
resourceName);
} else {
rc =
ClassLoader.getSystemResourceAsStream(
resourceName);
}
return rc;
}
});
if (in == null) {
throw new IOException(I18NHelper.getMessage(messages,
"EXC_ResourceNotFound", resourceName));// NOI18N
}
}
bin = new BufferedInputStream(in);
properties.load(bin);
if (logger.isLoggable(Logger.FINE)) {
logger.fine("load "+resourceName + " successfuly"); // NOI18N
}
} finally {
try {
bin.close();
// XXX Need to close both streams in.close();
} catch (Exception e) {
// ignore
}
}
}
/**
* Resets the namespaces and counter.
*/
// XXX Consider renaming to "reset".
void resetCounter() {
namespaces.clear();
userJdbcInfoMap.clear();
counter = 0;
}
/**
* Sets user-provided policy to that provided in the given properties.
* @param props Properties which override built in defaults.
*/
public void setUserPolicy(Properties props) {
if (null != props) {
// Look for and set JDBCInfo entries. Use Enumeration instead of
// iterator because former gets default values while latter does
// not.
for (Enumeration e = props.propertyNames(); e.hasMoreElements();) {
String name = (String) e.nextElement();
String value = props.getProperty(name);
if (name.equals(USE_UNIQUE_TABLE_NAMES)) {
if (! StringHelper.isEmpty(value)) {
uniqueTableName =
Boolean.valueOf(value).booleanValue();
}
continue;
}
StringTokenizer nameParser =
new StringTokenizer(name, String.valueOf(DOT));
// Get the last element from key which is separated by DOT.
String indicator = null;
while (nameParser.hasMoreTokens()) {
indicator = nameParser.nextToken();
}
if (indicator.startsWith(INDICATOR_JDBC_PREFIX)) {
setJDBCInfoEntry(userJdbcInfoMap, name, value, indicator);
} else {
if (logger.isLoggable(Logger.INFO)) {
logger.info(
I18NHelper.getMessage(
messages,
"MSG_UnexpectedUserProp", // NOI18N
name, value)); // NOI18N
}
}
}
}
}
/**
* Sets whether or not unique table names should be generated.
* @param uniqueTableName If <code>true, tables names will be
* unique.
*/
public void setUniqueTableName(boolean uniqueTableName) {
this.uniqueTableName = uniqueTableName;
}
/**
* Returns the String name of the SQL type for a given JDBC type.
* @param jdbcType One of the values from java.sql.Types.
* @return Name of SQL type corresponding to given jdbcType.
*/
public String getSQLTypeName(int jdbcType) {
String rc = null;
// The name is in sqlInfo if it was loaded from one of our
// vendor-specific properties files.
Object o = sqlInfo.get(new Integer(jdbcType));
if (null != o) {
rc = (String) o;
} else {
// Otherwise, user has overriden, e.g. java.lang.String -> CLOB.
rc = getJdbcTypeName(jdbcType);
}
return rc;
}
/**
* Returns JDBC type information corresponding to the given field name
* and type. If fieldName is <code>null or there is no
* fieldName - specific information already existing, the default for the
* given fieldType is returned. Otherwise, information specific to the
* fieldName is returned. <em>Note: It is possible to have a field
* in a class have the same name as another class; this mechanism is not
* robust in that case:
* <pre>
* class Foo { }
*
* class MyFoo {
* Foo Foo = new Foo();
* }
* </pre>
* We think this obfuscation unlikely to occur.
* @param fieldName Name of field for which information is needed. May
* be null, in which case only fieldType is used to determine returned
* information.
* @param fieldType Name of a Java type.
* @return JDBCInfo representing the field or type.
*/
public JDBCInfo getJDBCInfo(String fieldName, String fieldType) {
JDBCInfo rc = null;
if (logger.isLoggable(Logger.FINEST)) {
logger.finest("Entering MappingPolicy.getJDBCInfo: " // NOI18N
+ fieldName + ", " + fieldType); // NOI18N
}
if (null != fieldName) {
// If fieldName is given, try to find a JDBCInfo using that name.
// Looking up fieldName only makes sense in userJdbcInfoMap
// which contains the user's overrides.
rc = (JDBCInfo) userJdbcInfoMap.get(fieldName);
if (null != rc && (! rc.isComplete())) {
// There is an override for the field named fieldName, but
// it is not complete, i.e., not all possible information
// about the field was provided in the user override.
//
// Choose a JDBCInfo to use to complete the information in rc.
// If the user override specifies a type and there is
// information about that type for the database, use that.
// Otherwise, use the given fieldType.
JDBCInfo ji = null;
if (rc.hasJdbcType()) {
ji = getdbJDBCInfo(rc.getJdbcType());
}
if (null == ji) {
ji = getdbJDBCInfo(fieldType);
}
// Fill in the rest of the fields in rc with values from ji.
rc.complete(ji);
}
}
if (null == rc) {
// Either fieldName is null, or there is no JDBCInfo specific to
// fieldName, so use fieldType.
rc = getdbJDBCInfo(fieldType);
}
// If dbJdbcInfoMap has an entry for rc's jdbc type, replace rc's jdbc
// type with the result of the mapping. This allows, for example, a
// user to specify that a field should be represented by a CLOB, when
// the database and/or driver do not support that but do support
// LONGVARCHAR (e.g. Sybase).
JDBCInfo ji = getdbJDBCInfo(rc.getJdbcType());
rc.override(ji);
if (logger.isLoggable(Logger.FINEST)) {
logger.finest("Leaving MappingPolicy.getJDBCInfo: " // NOI18N
+ fieldName + ", " + fieldType // NOI18N
+ " => " + rc); // NOI18N
}
return rc;
}
/**
* Gets the JDBCInfo corresponding to the type in the given JDBCInfo.
* I.e., it maps from one JDBCInfo to another on the basis of their
* types.
* @param ji JDBCInfo
* @return a JDBCInfo
* @throws IllegalArgumentException if <code>type is not recognized
* as being a valid member of java.sql.Types. Note that only a subset of
* the types in java.sql.Types are recognized.
*/
private JDBCInfo getdbJDBCInfo(int jdbcType) {
String typename = getJdbcTypeName(jdbcType);
return (JDBCInfo) dbJdbcInfoMap.get(typename);
}
/**
* Gets the JDBCInfo for the given fieldType
* @param fieldType Name of the type of a field
* @return a JDBCInfo for the given fieldType
*/
private JDBCInfo getdbJDBCInfo(String fieldType) {
JDBCInfo rc = (JDBCInfo) dbJdbcInfoMap.get(fieldType);
if (null == rc) {
// There is also nothing provided for the field's
// type, so use a BLOB.
rc = (JDBCInfo) dbJdbcInfoMap.get("BLOB"); // NOI18N
}
return rc;
}
/**
* Returns the boxed form of the java.sql.Types value corresponding to the
* given name.
* @param jdbcStringType Name of the value to return.
* @return Value from java.sql.Types, wrapped into an Integer, or null if
* jdbcTypeName is not that of a recognized JDBC type.
*/
static Integer getJdbcType(String jdbcTypeName) {
return (Integer) jdbcTypes.get(jdbcTypeName.toUpperCase());
}
/**
* Provides a String that can be recognized as a policy to override the
* default length of a field.
* @param className name of a class
* @param fieldName name of a field in that class
* @return a String that can be used as the name of a length override
* for a field in a class.
*/
public static String getOverrideForLength(
String className, String fieldName) {
return className
+ DOT + fieldName
+ DOT + DatabaseGenerationConstants.INDICATOR_JDBC_LENGTH;
}
/**
* Provides a String that can be recognized as a policy to override the
* default nullability of a field.
* @param className name of a class
* @param fieldName name of a field in that class
* @return a String that can be used as the name of a nullability override
* for a field in a class.
*/
public static String getOverrideForNullability(
String className, String fieldName) {
return className
+ DOT + fieldName
+ DOT + DatabaseGenerationConstants.INDICATOR_JDBC_NULLABLE;
}
/**
* Provides a String that can be recognized as a policy to override the
* default precision of a field.
* @param className name of a class
* @param fieldName name of a field in that class
* @return a String that can be used as the name of a precision override
* for a field in a class.
*/
public static String getOverrideForPrecision(
String className, String fieldName) {
return className
+ DOT + fieldName
+ DOT + DatabaseGenerationConstants.INDICATOR_JDBC_PRECISION;
}
/**
* Provides a String that can be recognized as a policy to override the
* default scale of a field.
* @param className name of a class
* @param fieldName name of a field in that class
* @return a String that can be used as the name of a scale override
* for a field in a class.
*/
public static String getOverrideForScale(
String className, String fieldName) {
return className
+ DOT + fieldName
+ DOT + DatabaseGenerationConstants.INDICATOR_JDBC_SCALE;
}
/**
* Provides a String that can be recognized as a policy to override the
* default type of a field.
* @param className name of a class
* @param fieldName name of a field in that class
* @return a String that can be used as the name of a type override
* for a field in a class.
*/
public static String getOverrideForType(
String className, String fieldName) {
return className
+ DOT + fieldName
+ DOT + DatabaseGenerationConstants.INDICATOR_JDBC_TYPE;
}
/**
* Provide the String name of a JDBC type, as per java.sql.Types.
* @param type A value from java.sql.Types
* @return the String name corresponding to <code>type
* @throws IllegalArgumentException if <code>type is not recognized
* as being a valid member of java.sql.Types. Note that only a subset of
* the types in java.sql.Types are recognized.
*/
public static String getJdbcTypeName(int type) throws
IllegalArgumentException {
String rc = (String) jdbcTypeNames.get(new Integer(type));
if (null == rc) {
throw new IllegalArgumentException();
}
return rc;
}
//
// In the getZZZName methods below, we lookup a policy and determine a
// name based on that policy. Note that the keys used for lookup are
// created from the given name(s), so that the result of looking up a
// policy might actually be the name that is returned.
//
/**
* Returns the name of a table for a given class, as per current policy.
* @param name Basis for what the returned table should be named, for
* example the unqualified name of a class.
* @param uniqueName Used if the current policy is to return a unique
* name. Client must provide a name that is unique to them.
* @return Name to be used for table. Regardless of the current policy,
* the name is different from other names returned during the current run
* of {@link DatabaseGenerator#generate}.
*/
// XXX FIXME: If the user needs to provide a unique name, why do we
// invoke getUniqueGlobalName on it?
public String getTableName(String name, String uniqueName) {
StringBuffer key =
new StringBuffer(name).append(DOT).append(INDICATOR_TABLE_NAME);
String rc = (String)namingPolicy.get(key.toString());
if (rc == null) {
rc = (String)namingPolicy.get(DEFAULT_TABLE_KEY);
}
if (uniqueTableName) {
rc = TABLE_NAME_HASH_UPPERCASE;
}
if (rc.equals(TABLE_NAME_UPPERCASE)) {
rc = name.toUpperCase();
} else if (rc.equals(TABLE_NAME_AS_CLASSNAME)) {
rc = name;
} else if (rc.equals(TABLE_NAME_HASH_UPPERCASE)) {
rc = uniqueName.toUpperCase();
}
return getUniqueGlobalName(rc, tableNameMaxLength);
}
/**
* Returns the name of a column for a given field in a given class. The
* column name will be unique within the table.
* @param className Name of the class containing the field.
* @param fieldName Name of the field for which a column name is returned.
* @param tableName Name of the table in which the column name is created.
* @return Name of a column that is unique within the named table.
*/
public String getColumnName(String className, String fieldName,
String tableName) {
// Get column naming policy based on className and fieldName
StringBuffer key = new StringBuffer(className)
.append(DOT).append(fieldName)
.append(DOT).append(INDICATOR_COLUMN_NAME);
String rc = (String)namingPolicy.get(key.toString());
if (rc == null) {
// No fieldName specific policy, so use default for className
key = new StringBuffer(className)
.append(DOT).append(FIELD_BASE)
.append(DOT).append(INDICATOR_COLUMN_NAME);
rc = (String)namingPolicy.get(key.toString());
}
if (rc == null) {
// No overriding policy, so use overall default.
rc = (String)namingPolicy.get(DEFAULT_COLUMN_KEY);
}
if (rc.equals(COLUMN_NAME_UPPERCASE)) {
rc = fieldName.toUpperCase();
} else if (rc.equals(COLUMN_NAME_AS_FIELDNAME)) {
rc = fieldName;
}
return getUniqueLocalName(rc, tableName, columnNameMaxLength);
}
/**
* Returns the name of the column which represents a foreign key in the
* named table.
* @param tableName Name of the table in which the FK column will be
* created.
* @param columnName Name of PK column in referenced table.
* @return Name of the FK column in the named table.
*/
// XXX Does this really need to be public?
// XXX Rename to getFKColumnName
public String getConstraintColumnName(String tableName,
String columnName) {
return getUniqueLocalName(
new StringBuffer(tableName)
.append(DatabaseConstants.NAME_SEPARATOR)
.append(columnName).toString(),
tableName,
columnNameMaxLength);
}
/**
* Returns the name of a constraint corresponding to the named
* relationship.
* @param relName Name of a relationship.
* @param uniqueId Id that can be appened to relName to distinguish it
* from other relNames in the database. Will be appended only if
* {@link #uniqueTableName} is true.
* @return Name of a constraint.
*/
public String getConstraintName(String relName, String uniqueId) {
String rc = (String)namingPolicy.get(DEFAULT_CONSTRAINT_KEY);
if (rc.equals(CONSTRAINT_NAME_UPPERCASE)) {
rc = FK_PREFIX + relName.toUpperCase();
}
if (uniqueTableName) {
rc += uniqueId;
}
rc = getUniqueGlobalName(rc, constraintNameMaxLength);
if (logger.isLoggable(Logger.FINER)) {
logger.finer("MappingPolicy.getConstraintName: " // NOI8N
+ relName + " -> " + rc); // NOI18N
}
return rc;
}
/**
* Returns the name of a PK constraint, unique-ified as required.
* @param tableName Name of a table on which a constraint is to be placed.
* @return Name of a constraint on named table.
*/
public String getPrimaryKeyConstraintName(String tableName) {
return getUniqueGlobalName(PK_PREFIX + tableName, constraintNameMaxLength);
}
/**
* Returns the name of a join table which joins the tables that correspond
* to the two named classes.
* @param className1 Name of one class to join.
* @param className2 Name of the other class to join.
* @return Name of a join table.
*/
public String getJoinTableName(String className1, String className2) {
String rc = (String)namingPolicy.get(DEFAULT_JOIN_TABLE_KEY);
if (rc.equals(JOIN_TABLE_NAME_UPPERCASE)) {
rc = (className1 + className2).toUpperCase();
}
return getUniqueGlobalName(rc, tableNameMaxLength);
}
/**
* Return a unique name for a column. The column will be unique within
* the named table.
* @param colName Name of the column
* @param tableName Name of the table.
* @return A unique name for colName within tableName.
*/
private String getUniqueLocalName(
String colName, String tableName, int maxLen) {
return getUniqueName(colName, tableName, maxLen);
}
/**
* Return a unique name for the given name. It will be "globally" unique
* between invocations of method {@link #resetCounter}; the first use of
* a MappingPolicy instance is "reset".
* @param name Name for which a unique name is returned.
* @return A unique name for given name.
*/
private String getUniqueGlobalName(String name, int maxLen) {
return getUniqueName(name, GLOBAL_NAMING_SPACE, maxLen);
}
/**
* Return a unique name for name. It will be unique within the given
* namespace.
* @param name Name for which a unique name is returned.
* @param space Namespace in which the returned name is unique.
* @return A unique name for given name.
*/
private String getUniqueName(String name, String namespace, int maxLen) {
String rc = name;
// Reserve MAX_LEN_COUNTER characters for unique-ifying digits.
maxLen -= MAX_LEN_COUNTER;
// Name cannot be more than maxLen chars long.
if (name.length() > maxLen) {
rc = name.substring(0, maxLen);
}
// Convert to upper case for uniqueing comparisons below.
String nameUpper = rc.toUpperCase();
// Ensure the name we create is not a reserved word by comparing
// nameUpper against reserved words.
if (defaultReservedWords.contains(nameUpper)
|| reservedWords.contains(nameUpper)) {
// Append a character that is not used as the last char of any
// existing reserved words. Make sure we have space for this plus
// for any uniqueing below. Length-limit both rc and nameUpper, so
// that the value in the namespace and the end result have the same
// length.
maxLen -= MAX_LEN_RESERVED;
if (rc.length() > maxLen) {
// Limit nameUpper as well as rc because we need to do uniqueing
// in a case-insensitve fashion.
nameUpper = nameUpper.substring(0, maxLen);
rc = rc.substring(0, maxLen);
}
nameUpper += RESERVED_WORD_UNRESERVER;
rc += RESERVED_WORD_UNRESERVER;
}
Set names = (Set) namespaces.get(namespace);
if (names == null) {
// Name is first entry in namespace, therefore already unique, no
// need to append counter.
names = new HashSet();
names.add(nameUpper);
namespaces.put(namespace, names);
} else if (names.contains(nameUpper)) {
// Name is already in namespace, so make a different name by
// appending a count to given name.
counter++;
rc += DatabaseConstants.NAME_SEPARATOR + counter;
} else {
// Add new name to namespace.
names.add(nameUpper);
}
return rc;
}
//
// Accessors for SQL formatting Strings.
//
/**
* @return the SQL for a statement separator.
*/
String getStatementSeparator() {
return statementSeparator;
}
/**
* @return the SQL for starting a "create table".
*/
String getCreateTableStart() {
return createTableStart;
}
/**
* @return the SQL for ending a "create table".
*/
String getCreateTableEnd() {
return createTableEnd;
}
/**
* @return the SQL for "create index".
*/
String getCreateIndex() {
return createIndex;
}
/**
* @return the SQL for a "drop table".
*/
String getDropTable() {
return dropTable;
}
/**
* @return the SQL for "add constraint".
*/
String getAlterTableAddConstraintStart() {
return alterTableAddConstraintStart;
}
/**
* @return the SQL for "drop constraint".
*/
String getAlterTableDropConstraint() {
return alterTableDropConstraint;
}
/**
* @return the SQL for adding a primary key constraint.
*/
String getPrimaryKeyConstraint() {
return primaryKeyConstraint;
}
/**
* @return the SQL for adding a foreign key constraint.
*/
String getForeignKeyConstraint() {
return foreignKeyConstraint;
}
/**
* @return the SQL for indicating column nullability
*/
String getColumnNullability() {
return columnNullability;
}
/**
* @return the SQL for indicating LOB column logging
*/
String getLobLogging() {
return lobLogging;
}
//
// This method and the 4 subsequent ones initialize a MappingPolicy
// instance from a give Properties object.
//
/**
* Initialize this MappingPolicy as per the values in the given
* properties.
* @param props Properties for initializing this MappingPolicy
*/
private void init(Properties props) {
// Use Enumeration instead of iterator because former gets default
// values while latter does not.
for (Enumeration e = props.propertyNames(); e.hasMoreElements();) {
String name = (String) e.nextElement();
String value = props.getProperty(name);
if (name.equals(RESERVED_WORDS)) {
initReservedWords(value);
continue;
}
// The indicator is the last DOT-separated substring in name.
String indicator = null;
StringTokenizer nameParser =
new StringTokenizer(name, String.valueOf(DOT));
while (nameParser.hasMoreTokens()) {
indicator = nameParser.nextToken();
}
if (indicator.equals(INDICATOR_SQL_FORMAT)) {
setSqlFormatEntry(name, value);
} else if (indicator.startsWith(INDICATOR_JDBC_PREFIX)) {
setJDBCInfoEntry(dbJdbcInfoMap, name, value, indicator);
} else if (indicator.equals(INDICATOR_MAXIMUM_LENGTH)) {
setLengthEntry(name, value);
} else if (indicator.equals(INDICATOR_TABLE_NAME) ||
indicator.equals(INDICATOR_COLUMN_NAME) ||
indicator.equals(INDICATOR_JOIN_TABLE_NAME) ||
indicator.equals(INDICATOR_CONSTRAINT_NAME)) {
setNamingEntry(name, value);
} else {
setSQLInfoEntry(name, value);
}
}
}
/**
* Initializes the <code>reservedWords field.
* @param res Comma-separated list of reserved words.
*/
private void initReservedWords(String res) {
StringTokenizer st = new StringTokenizer(res, ",");
while (st.hasMoreTokens()) {
reservedWords.add(st.nextToken().trim());
}
}
//
// These methods each set a value in one of our maps.
//
/**
* Sets a SQL formatting property in this MappingPolicy.
* @param name Name of the policy property, including its indicator.
* @param indicator The indicator, alone, which should start with
* "sql-format".
* @param value Value to be bound to that property.
*/
private void setSqlFormatEntry(String name, String value) {
if (value != null) {
if (name.startsWith(STATEMENT_SEPARATOR_INDICATOR)) {
statementSeparator = value;
} else if (name.startsWith(CREATE_TABLE_START_INDICATOR)) {
createTableStart = value;
} else if (name.startsWith(CREATE_TABLE_END_INDICATOR)) {
createTableEnd = value;
} else if (name.startsWith(CREATE_INDEX_INDICATOR)) {
createIndex = value;
} else if (name.startsWith(DROP_TABLE_INDICATOR)) {
dropTable = value;
} else if (name.startsWith(ALTER_TABLE_ADD_CONSTRAINT_START_INDICATOR)) {
alterTableAddConstraintStart = value;
} else if (name.startsWith(ALTER_TABLE_DROP_CONSTRAINT_INDICATOR)) {
alterTableDropConstraint = value;
} else if (name.startsWith(PRIMARY_KEY_CONSTRAINT_INDICATOR)) {
primaryKeyConstraint = value;
} else if (name.startsWith(FOREIGN_KEY_CONSTRAINT_INDICATOR)) {
foreignKeyConstraint = value;
} else if (name.startsWith(COLUMN_NULLABILITY_INDICATOR)) {
columnNullability = value;
} else if (name.startsWith(LOB_LOGGING_INDICATOR)) {
lobLogging = value;
}
}
}
/**
* Sets a JDBC property in this MappingPolicy.
* @param Map into which property is set.
* @param name Name of the policy property, including its indicator.
* @param indicator The indicator, alone, which should start with
* "jdbc-".
* @param value Value to be bound to that property.
*/
private void setJDBCInfoEntry(
Map jdbcInfoMap, String name, String value, String indicator) {
if (value != null) {
// Get substring that is before the indicator, which is the name
// of a type or of a particular field.
String fieldOrType = name;
int i = name.indexOf(DOT + indicator);
if (i > 0) {
fieldOrType = name.substring(0, i);
}
JDBCInfo ji = (JDBCInfo) jdbcInfoMap.get(fieldOrType);
try {
if (null != ji) {
ji.setValue(value, indicator);
} else {
ji = new JDBCInfo();
ji.setValue(value, indicator);
jdbcInfoMap.put(fieldOrType, ji);
}
} catch (JDBCInfo.IllegalJDBCTypeException ex) {
String msg = I18NHelper.getMessage(
messages,
"EXC_InvalidJDBCTypeName", // NOI18N
value, fieldOrType);
logger.log(Logger.SEVERE, msg);
throw new IllegalArgumentException(msg);
}
}
}
/**
* Sets a name length attribute.
* @param name Name of the attribute to set. Should be
* INDICATOR_TABLE_NAME, INDICATOR_COLUMN_NAME, or
* INDICATOR_CONSTRAINT_NAME.
* @param value Value to which attribute is set.
*/
private void setLengthEntry(String name, String value) {
if (value != null) {
int val = Integer.valueOf(value).intValue();
if (name.startsWith(INDICATOR_TABLE_NAME)) {
tableNameMaxLength = val;
} else if (name.startsWith(INDICATOR_COLUMN_NAME)) {
columnNameMaxLength = val;
} else if (name.startsWith(INDICATOR_CONSTRAINT_NAME)) {
constraintNameMaxLength = val;
}
}
}
/**
* Set a naming property in this MappingPolicy.
* @param name Name of the policy property.
* @param value Value to be bound to that property.
*/
private void setNamingEntry(String name, String value) {
namingPolicy.put(name, value);
}
/**
* Sets a JDBC-to-SQL mapping property, that is, a mapping from a JDBC
* type to a SQL type.
* @param name Name of a JDBC type (see {@link java.sql.Types}).
* @param value SQL type to be used to represent given JDBC type in
* database.
*/
private void setSQLInfoEntry(String name, String value) {
sqlInfo.put(getJdbcType(name), value);
}
/**
* @param databaseType Name of a type of database.
* @return Name of a file containing a description of properties for
* named database type.
*/
private static String getPropertyFileName(String databaseType) {
return PROPERTY_FILE_DIR + databaseType + PROPERTY_FILE_EXT;
}
/**
* Debug support.
* @return A description of this MappingPolicy in string form.
* Basically, all it's "interesting" values.
*/
public String toString() {
StringBuffer rc = new StringBuffer(
"statementSeparator=" + statementSeparator // NOI18N
+ "\ncreateTableStart=" + createTableStart // NOI18N
+ "\ncreateTableEnd=" + createTableEnd // NOI18N
+ "\ncreateIndex=" + createIndex // NOI18N
+ "\ndropTable=" + dropTable // NOI18N
+ "\nalterTableAddConstraintStart=" + alterTableAddConstraintStart // NOI18N
+ "\nalterTableDropConstraint=" + alterTableDropConstraint // NOI18N
+ "\nprimaryKeyConstraint=" + primaryKeyConstraint // NOI18N
+ "\nforeignKeyConstraint=" + foreignKeyConstraint // NOI18N
+ "\ncolumnNullability=" + columnNullability // NOI18N
+ "\nlobLogging=" + lobLogging // NOI18N
+ "\ntableNameMaxLength=" + tableNameMaxLength // NOI18N
+ "\ncolumnNameMaxLength=" + columnNameMaxLength // NOI18N
+ "\nconstraintNameMaxLength=" + constraintNameMaxLength // NOI18N
+ "\nuniqueTableName=" + uniqueTableName // NOI18N
+ "\ncounter=" + counter // NOI18N
+ "\n\n"); // NOI18N
rc.append(" dbJdbcInfoMap:\n").append(stringifyMap(dbJdbcInfoMap)); // NOI18N
rc.append(" userJdbcInfoMap:\n").append(stringifyMap(userJdbcInfoMap)); // NOI18N
rc.append(" sqlInfo:\n").append(stringifyMap(sqlInfo)); // NOI18N
rc.append(" namingPolicy:\n").append(stringifyMap(namingPolicy)); // NOI18N
rc.append(" namespaces:\n").append(stringifyMap(namespaces)); // NOI18N
rc.append(" reservedWords:\n").append(stringifySet(reservedWords)); // NOI18N
return rc.toString();
}
/**
* Debug support.
* @param m Map whose keys & values are to be returned in a string.
* @return The string form of m's keys and values, each pair separated
* from the next by a newline, with keys separated from values by '='.
*/
private String stringifyMap(Map m) {
StringBuffer rc = new StringBuffer();
for (Iterator i = m.entrySet().iterator(); i.hasNext();) {
Map.Entry e = (Map.Entry) i.next();
rc.append(e.getKey()).append("=") // NOI18N
.append(e.getValue()).append("\n"); // NOI18N
}
return rc.toString();
}
/**
* Debug support
* @param s Set whose values are to be returned in a string
* @return values from the given set, separated by spaces, up to 6 per
* line.
*/
private String stringifySet(Set s) {
StringBuffer rc = new StringBuffer();
int count = 0;
for (Iterator i = s.iterator(); i.hasNext();) {
rc.append(i.next()).append(" "); // NOI18N
if (count++ > 6) {
rc.append("\n"); // NOI18N
count = 0;
}
}
return rc.toString();
}
}
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