/************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * Copyright 2008, 2010 Oracle and/or its affiliates. All rights reserved.
 * 
 * Use is subject to license terms.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy
 * of the License at http://www.apache.org/licenses/LICENSE-2.0. You can also
 * obtain a copy of the License at http://odftoolkit.org/docs/license.txt
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * 
 * See the License for the specific language governing permissions and
 * limitations under the License.
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 ************************************************************************/

package org.odftoolkit.odfvalidator;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class VersionHandler extends DefaultHandler {

    private static final String OFFICE_NAMESPACE_URI = "urn:oasis:names:tc:opendocument:xmlns:office:1.0";
    private static final String DOCUMENT_META = "document-meta";
    private static final String DOCUMENT_CONTENT = "document-content";
    private static final String DOCUMENT_SETTINGS = "document-settings";
    private static final String DOCUMENT_STYLES = "document-styles";
    private static final String VERSION = "version";

    @Override
    public void startElement(String aUri, String aLocalName, String aQName, Attributes aAttributes) throws SAXException {
        super.startElement(aUri, aLocalName, aQName, aAttributes);
        
        if( aUri.equals(OFFICE_NAMESPACE_URI) &&
            (aLocalName.equalsIgnoreCase(DOCUMENT_META) ||
             aLocalName.equalsIgnoreCase(DOCUMENT_CONTENT) || 
             aLocalName.equalsIgnoreCase(DOCUMENT_SETTINGS) ||
             aLocalName.equalsIgnoreCase(DOCUMENT_STYLES)) )
        {
            String aVersion = aAttributes.getValue(OFFICE_NAMESPACE_URI,VERSION);
            throw new SAXVersionException(aVersion);
        }
    }

}