/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed 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.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.tools.internal.xjc.util;

import org.xml.sax.Attributes;

import org.xml.sax.ContentHandler;

import org.xml.sax.Locator;

import org.xml.sax.SAXException;

/**

 * ContentHandler that "forks" the incoming SAX2 events to

 * two ContentHandlers.

 *

 *

 * @author  <a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>

 */

public class ForkContentHandler implements ContentHandler {

        /**

         * Creates a ForkContentHandler.

         *

         * @param first

         *     This handler will receive a SAX event first.

         * @param second

         *     This handler will receive a SAX event after the first handler

         *     receives it.

         */

        public ForkContentHandler( ContentHandler first, ContentHandler second ) {

                lhs = first;

                rhs = second;

        }

        /**

         * Creates ForkContentHandlers so that the specified handlers

         * will receive SAX events in the order of the array.

         */

        public static ContentHandler create( ContentHandler[] handlers ) {

                if(handlers.length==0)

                        throw new IllegalArgumentException();

                ContentHandler result = handlers[0];

                for( int i=1; i<handlers.length; i++ )

                        result = new ForkContentHandler( result, handlers[i] );

                return result;

        }

        private final ContentHandler lhs,rhs;

        public void setDocumentLocator (Locator locator) {

                lhs.setDocumentLocator(locator);

                rhs.setDocumentLocator(locator);

        }

        public void startDocument() throws SAXException {

                lhs.startDocument();

                rhs.startDocument();

        }

        public void endDocument () throws SAXException {

                lhs.endDocument();

                rhs.endDocument();

        }

        public void startPrefixMapping (String prefix, String uri) throws SAXException {

                lhs.startPrefixMapping(prefix,uri);

                rhs.startPrefixMapping(prefix,uri);

        }

        public void endPrefixMapping (String prefix) throws SAXException {

                lhs.endPrefixMapping(prefix);

                rhs.endPrefixMapping(prefix);

        }

        public void startElement (String uri, String localName, String qName, Attributes attributes) throws SAXException {

                lhs.startElement(uri,localName,qName,attributes);

                rhs.startElement(uri,localName,qName,attributes);

        }

        public void endElement (String uri, String localName, String qName) throws SAXException {

                lhs.endElement(uri,localName,qName);

                rhs.endElement(uri,localName,qName);

        }

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

                lhs.characters(ch,start,length);

                rhs.characters(ch,start,length);

        }

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

                lhs.ignorableWhitespace(ch,start,length);

                rhs.ignorableWhitespace(ch,start,length);

        }

        public void processingInstruction (String target, String data) throws SAXException {

                lhs.processingInstruction(target,data);

                rhs.processingInstruction(target,data);

        }

        public void skippedEntity (String name) throws SAXException {

                lhs.skippedEntity(name);

                rhs.skippedEntity(name);

        }

}