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package com.sun.org.apache.xerces.internal.dom;

import org.w3c.dom.DOMImplementation;
import org.w3c.dom.DocumentType;

The DOMImplementation class is description of a particular implementation of the Document Object Model. As such its data is static, shared by all instances of this implementation.

The DOM API requires that it be a real object rather than static methods. However, there's nothing that says it can't be a singleton, so that's how I've implemented it.

@xerces.internal
Since: PR-DOM-Level-1-19980818.
/** * The DOMImplementation class is description of a particular * implementation of the Document Object Model. As such its data is * static, shared by all instances of this implementation. * <P> * The DOM API requires that it be a real object rather than static * methods. However, there's nothing that says it can't be a singleton, * so that's how I've implemented it. * * @xerces.internal * * @since PR-DOM-Level-1-19980818. */
public class PSVIDOMImplementationImpl extends DOMImplementationImpl { // // Data // // static
Dom implementation singleton.
/** Dom implementation singleton. */
static final PSVIDOMImplementationImpl singleton = new PSVIDOMImplementationImpl(); // // Public methods //
NON-DOM: Obtain and return the single shared object
/** NON-DOM: Obtain and return the single shared object */
public static DOMImplementation getDOMImplementation() { return singleton; } // // DOMImplementation methods //
Test if the DOM implementation supports a specific "feature" -- currently meaning language and level thereof.
Params:
  • feature – The package name of the feature to test. In Level 1, supported values are "HTML" and "XML" (case-insensitive). At this writing, com.sun.org.apache.xerces.internal.dom supports only XML.
  • version – The version number of the feature being tested. This is interpreted as "Version of the DOM API supported for the specified Feature", and in Level 1 should be "1.0"
Returns: true iff this implementation is compatable with the specified feature and version.
/** * Test if the DOM implementation supports a specific "feature" -- * currently meaning language and level thereof. * * @param feature The package name of the feature to test. * In Level 1, supported values are "HTML" and "XML" (case-insensitive). * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML. * * @param version The version number of the feature being tested. * This is interpreted as "Version of the DOM API supported for the * specified Feature", and in Level 1 should be "1.0" * * @return true iff this implementation is compatable with the specified * feature and version. */
public boolean hasFeature(String feature, String version) { return super.hasFeature(feature, version) || feature.equalsIgnoreCase("psvi"); } // hasFeature(String,String):boolean // // Protected methods // protected CoreDocumentImpl createDocument(DocumentType doctype) { return new PSVIDocumentImpl(doctype); } } // class PSVIDOMImplementationImpl