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JDK 1.6
  org.xml.sax.ext. DefaultHandler2 View Javadoc
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// DefaultHandler2.java - extended DefaultHandler
// http://www.saxproject.org
// Public Domain: no warranty.
// $Id: DefaultHandler2.java,v 1.2 2004/11/03 22:49:08 jsuttor Exp $

package org.xml.sax.ext;

import java.io.IOException;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;


/**
 * This class extends the SAX2 base handler class to support the
 * SAX2 {@link LexicalHandler}, {@link DeclHandler}, and
 * {@link EntityResolver2} extensions.  Except for overriding the
 * original SAX1 {@link DefaultHandler#resolveEntity resolveEntity()}
 * method the added handler methods just return.  Subclassers may
 * override everything on a method-by-method basis.
 *
 * <blockquote>
 * <em>This module, both source code and documentation, is in the
 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
 * </blockquote>
 *
 * <p> <em>Note:</em> this class might yet learn that the
 * <em>ContentHandler.setDocumentLocator()</em> call might be passed a
 * {@link Locator2} object, and that the
 * <em>ContentHandler.startElement()</em> call might be passed a
 * {@link Attributes2} object.
 *
 * @since SAX 2.0 (extensions 1.1 alpha)
 * @author David Brownell
 * @version TBS
 */
public class DefaultHandler2 extends DefaultHandler
    implements LexicalHandler, DeclHandler, EntityResolver2
{
    /** Constructs a handler which ignores all parsing events. */
    public DefaultHandler2 () { }


    // SAX2 ext-1.0 LexicalHandler

    public void startCDATA ()
    throws SAXException
	{}

    public void endCDATA ()
    throws SAXException
	{}

    public void startDTD (String name, String publicId, String systemId)
    throws SAXException
	{}

    public void endDTD ()
    throws SAXException
	{}

    public void startEntity (String name)
    throws SAXException
	{}

    public void endEntity (String name)
    throws SAXException
	{}

    public void comment (char ch [], int start, int length)
    throws SAXException
	{ }


    // SAX2 ext-1.0 DeclHandler

    public void attributeDecl (String eName, String aName,
	    String type, String mode, String value)
    throws SAXException
	{}

    public void elementDecl (String name, String model)
    throws SAXException
	{}

    public void externalEntityDecl (String name,
    	String publicId, String systemId)
    throws SAXException
	{}

    public void internalEntityDecl (String name, String value)
    throws SAXException
	{}

    // SAX2 ext-1.1 EntityResolver2

    /**
     * Tells the parser that if no external subset has been declared
     * in the document text, none should be used.
     */
    public InputSource getExternalSubset (String name, String baseURI)
    throws SAXException, IOException
	{ return null; }

    /**
     * Tells the parser to resolve the systemId against the baseURI
     * and read the entity text from that resulting absolute URI.
     * Note that because the older
     * {@link DefaultHandler#resolveEntity DefaultHandler.resolveEntity()},
     * method is overridden to call this one, this method may sometimes 
     * be invoked with null <em>name</em> and <em>baseURI</em>, and
     * with the <em>systemId</em> already absolutized.
     */
    public InputSource resolveEntity (String name, String publicId,
	    String baseURI, String systemId)
    throws SAXException, IOException
	{ return null; }
    
    // SAX1 EntityResolver

    /**
     * Invokes
     * {@link EntityResolver2#resolveEntity EntityResolver2.resolveEntity()}
     * with null entity name and base URI.
     * You only need to override that method to use this class.
     */
    public InputSource resolveEntity (String publicId, String systemId)
    throws SAXException, IOException
	{ return resolveEntity (null, publicId, null, systemId); }
}

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