/*
 * @(#)$Id: DocumentFilter.java,v 1.1 2001/08/02 17:31:33 Bear Exp $
 *
 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */
package com.sun.msv.util.xml;

import org.xml.sax.SAXException;
import org.xml.sax.Locator;
import org.xml.sax.DocumentHandler;
import org.xml.sax.AttributeList;

/**
 * SAX DocumentHandler event interceptor.
 * 
 * This object acts as a filter to DocumentHandler events.
 * Derived class should override methods of interest and
 * perform somethings.
 * 
 * @author
 *	<a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>
 */
public class DocumentFilter implements DocumentHandler
{
	public DocumentHandler next;
	
	public DocumentFilter( DocumentHandler next ) {
		this.next = next;
	}
	
	public void startDocument() throws SAXException {
		next.startDocument();
	}
	public void endDocument() throws SAXException {
		next.endDocument();
	}
	public void startElement( String name, AttributeList atts ) throws SAXException {
		next.startElement(name,atts);
	}
	public void endElement( String name ) throws SAXException {
		next.endElement(name);
	}
	public void characters( char[] buf, int start, int len ) throws SAXException {
		next.characters(buf,start,len);
	}
	public void ignorableWhitespace( char[] buf, int start, int len ) throws SAXException {
		next.ignorableWhitespace(buf,start,len);
	}
	public void processingInstruction( String target, String data ) throws SAXException {
		next.processingInstruction(target,data);
	}
	public void setDocumentLocator( Locator loc ) {
		next.setDocumentLocator(loc);
	}
}