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/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* 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.
*/
package org.apache.tika.parser.xml;
import org.apache.tika.metadata.DublinCore;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.sax.TeeContentHandler;
import org.apache.tika.sax.xpath.CompositeMatcher;
import org.apache.tika.sax.xpath.Matcher;
import org.apache.tika.sax.xpath.MatchingContentHandler;
import org.apache.tika.sax.xpath.XPathParser;
import org.xml.sax.ContentHandler;
/**
* Dublin Core metadata parser
*/
public class DcXMLParser extends XMLParser {
private static final XPathParser DC_XPATH = new XPathParser(
"dc", "http://purl.org/dc/elements/1.1/");
private static ContentHandler getDublinCore(
ContentHandler ch, Metadata md, String name, String element) {
Matcher matcher = new CompositeMatcher(
DC_XPATH.parse("//dc:" + element),
DC_XPATH.parse("//dc:" + element + "//text()"));
ContentHandler branch =
new MatchingContentHandler(new MetadataHandler(md, name), matcher);
return new TeeContentHandler(ch, branch);
}
protected ContentHandler getContentHandler(ContentHandler ch, Metadata md) {
ch = super.getContentHandler(ch, md);
ch = getDublinCore(ch, md, DublinCore.TITLE, "title");
ch = getDublinCore(ch, md, DublinCore.SUBJECT, "subject");
ch = getDublinCore(ch, md, DublinCore.CREATOR, "creator");
ch = getDublinCore(ch, md, DublinCore.DESCRIPTION, "description");
ch = getDublinCore(ch, md, DublinCore.PUBLISHER, "publisher");
ch = getDublinCore(ch, md, DublinCore.CONTRIBUTOR, "contributor");
try {
ch = getDublinCore(ch, md, DublinCore.DATE.getName(), "date");
} catch (Exception e) {
// Date format and parsing behavior was undefined and untested when DublinCare
// date was converted to Property.internalDate so we silently skip date on parse error
}
ch = getDublinCore(ch, md, DublinCore.TYPE, "type");
ch = getDublinCore(ch, md, DublinCore.FORMAT, "format");
ch = getDublinCore(ch, md, DublinCore.IDENTIFIER, "identifier");
ch = getDublinCore(ch, md, DublinCore.LANGUAGE, "language");
ch = getDublinCore(ch, md, DublinCore.RIGHTS, "rights");
return ch;
}
}
