The TypeInfo.java Java example source code
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* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file and, per its terms, should not be removed:
*
* Copyright (c) 2004 World Wide Web Consortium,
*
* (Massachusetts Institute of Technology, European Research Consortium for
* Informatics and Mathematics, Keio University). All Rights Reserved. This
* work is distributed under the W3C(r) Software License [1] in the hope that
* it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
*/
package org.w3c.dom;
/**
* The <code>TypeInfo interface represents a type referenced from
* <code>Element or Attr nodes, specified in the schemas
* associated with the document. The type is a pair of a namespace URI and
* name properties, and depends on the document's schema.
* <p> If the document's schema is an XML DTD [XML 1.0], the values
* are computed as follows:
* <ul>
* <li> If this type is referenced from an
* <code>Attr node, typeNamespace is
* <code>"http://www.w3.org/TR/REC-xml" and typeName
* represents the <b>[attribute type] property in the [XML Information Set]
* . If there is no declaration for the attribute, <code>typeNamespace
* and <code>typeName are null.
* </li>
* <li> If this type is
* referenced from an <code>Element node, typeNamespace
* and <code>typeName are null.
* </li>
* </ul>
* <p> If the document's schema is an XML Schema [XML Schema Part 1]
* , the values are computed as follows using the post-schema-validation
* infoset contributions (also called PSVI contributions):
* <ul>
* <li> If the [validity] property exists AND is "invalid" or "notKnown": the {target namespace} and {name} properties of the declared type if
* available, otherwise <code>null.
* <p >Note: At the time of writing, the XML Schema specification does
* not require exposing the declared type. Thus, DOM implementations might
* choose not to provide type information if validity is not valid.
* </li>
* <li> If the [validity] property exists and is "valid":
* <ol>
* <li> If [member type definition] exists:
* <ol>
* <li>If {name} is not absent, then expose {name} and {target
* namespace} properties of the <b>[member type definition] property;
* </li>
* <li>Otherwise, expose the namespace and local name of the
* corresponding anonymous type name.
* </li>
* </ol>
* </li>
* <li> If the [type definition] property exists:
* <ol>
* <li>If {name} is not absent, then expose {name} and {target
* namespace} properties of the <b>[type definition] property;
* </li>
* <li>Otherwise, expose the namespace and local name of the
* corresponding anonymous type name.
* </li>
* </ol>
* </li>
* <li> If the [member type definition anonymous] exists:
* <ol>
* <li>If it is false, then expose [member type definition name] and [member type definition namespace] properties;
* </li>
* <li>Otherwise, expose the namespace and local name of the
* corresponding anonymous type name.
* </li>
* </ol>
* </li>
* <li> If the [type definition anonymous] exists:
* <ol>
* <li>If it is false, then expose [type definition name] and [type definition namespace] properties;
* </li>
* <li>Otherwise, expose the namespace and local name of the
* corresponding anonymous type name.
* </li>
* </ol>
* </li>
* </ol>
* </li>
* </ul>
* <p >Note: Other schema languages are outside the scope of the W3C
* and therefore should define how to represent their type systems using
* <code>TypeInfo.
* <p>See also the Document Object Model (DOM) Level 3 Core Specification.
* @since DOM Level 3
*/
public interface TypeInfo {
/**
* The name of a type declared for the associated element or attribute,
* or <code>null if unknown.
*/
public String getTypeName();
/**
* The namespace of the type declared for the associated element or
* attribute or <code>null if the element does not have
* declaration or if no namespace information is available.
*/
public String getTypeNamespace();
// DerivationMethods
/**
* If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1]
* , this constant represents the derivation by <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#key-typeRestriction'>
* restriction</a> if complex types are involved, or a
* restriction</a> if simple types are involved.
* <br> The reference type definition is derived by restriction from the
* other type definition if the other type definition is the same as the
* reference type definition, or if the other type definition can be
* reached recursively following the {base type definition} property
* from the reference type definition, and all the <em>derivation methods involved are restriction.
*/
public static final int DERIVATION_RESTRICTION = 0x00000001;
/**
* If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1]
* , this constant represents the derivation by <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#key-typeExtension'>
* extension</a>.
* <br> The reference type definition is derived by extension from the
* other type definition if the other type definition can be reached
* recursively following the {base type definition} property from the
* reference type definition, and at least one of the <em>derivation methods involved is an extension.
*/
public static final int DERIVATION_EXTENSION = 0x00000002;
/**
* If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1]
* , this constant represents the <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-union'>
* union</a> if simple types are involved.
* <br> The reference type definition is derived by union from the other
* type definition if there exists two type definitions T1 and T2 such
* as the reference type definition is derived from T1 by
* <code>DERIVATION_RESTRICTION or
* <code>DERIVATION_EXTENSION, T2 is derived from the other type
* definition by <code>DERIVATION_RESTRICTION, T1 has {variety} union, and one of the {member type definitions} is T2. Note that T1 could be
* the same as the reference type definition, and T2 could be the same
* as the other type definition.
*/
public static final int DERIVATION_UNION = 0x00000004;
/**
* If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1]
* , this constant represents the <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-list'>list.
* <br> The reference type definition is derived by list from the other
* type definition if there exists two type definitions T1 and T2 such
* as the reference type definition is derived from T1 by
* <code>DERIVATION_RESTRICTION or
* <code>DERIVATION_EXTENSION, T2 is derived from the other type
* definition by <code>DERIVATION_RESTRICTION, T1 has {variety} list, and T2 is the {item type definition}. Note that T1 could be the same as
* the reference type definition, and T2 could be the same as the other
* type definition.
*/
public static final int DERIVATION_LIST = 0x00000008;
/**
* This method returns if there is a derivation between the reference
* type definition, i.e. the <code>TypeInfo on which the method
* is being called, and the other type definition, i.e. the one passed
* as parameters.
* @param typeNamespaceArg the namespace of the other type definition.
* @param typeNameArg the name of the other type definition.
* @param derivationMethod the type of derivation and conditions applied
* between two types, as described in the list of constants provided
* in this interface.
* @return If the document's schema is a DTD or no schema is associated
* with the document, this method will always return <code>false
* . If the document's schema is an XML Schema, the method will return
* <code>true if the reference type definition is derived from
* the other type definition according to the derivation parameter. If
* the value of the parameter is <code>0 (no bit is set to
* <code>1 for the derivationMethod parameter),
* the method will return <code>true if the other type
* definition can be reached by recursing any combination of {base
* type definition}, {item type definition}, or {member type
* definitions} from the reference type definition.
*/
public boolean isDerivedFrom(String typeNamespaceArg,
String typeNameArg,
int derivationMethod);
}
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