/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2012 The eXist Project
 *  http://exist-db.org
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *  $Id$
 */
package org.exist.contentextraction;

import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

/**
 * @author Dulip Withanage <dulip.withanage@gmail.com>
 * @version 1.0
 */
public class AbortAfterMetadataContentHandler implements ContentHandler {

    private final ContentHandler contentHandler;

    public AbortAfterMetadataContentHandler(ContentHandler contentHandler) {
        this.contentHandler = contentHandler;
    }

    @Override
    public void setDocumentLocator(Locator locator) {
        contentHandler.setDocumentLocator(locator);
    }

    @Override
    public void startDocument() throws SAXException {
        contentHandler.startDocument();
    }

    @Override
    public void endDocument() throws SAXException {
        contentHandler.endDocument();
    }

    @Override
    public void startPrefixMapping(String prefix, String uri) throws SAXException {
        contentHandler.startPrefixMapping(prefix, uri);
    }

    @Override
    public void endPrefixMapping(String prefix) throws SAXException {
        contentHandler.endPrefixMapping(prefix);
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
        contentHandler.startElement(uri, localName, qName, atts);
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        contentHandler.endElement(uri, localName, qName);
        if (uri != null && uri.equals(XHTMLContentHandler.XHTML) && localName.equals("head")) {
            endElement(XHTMLContentHandler.XHTML, "html", "html");
            endDocument();
            throw new AbortedAfterMetadataException();
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        contentHandler.characters(ch, start, length);
    }

    @Override
    public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
        contentHandler.ignorableWhitespace(ch, start, length);
    }

    @Override
    public void processingInstruction(String target, String data) throws SAXException {
        contentHandler.processingInstruction(target, data);
    }

    @Override
    public void skippedEntity(String name) throws SAXException {
        contentHandler.skippedEntity(name);
    }
}