/*
* 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 java.io.IOException;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.AutoDetectParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.Parser;
import org.exist.util.serializer.Receiver;
import org.exist.util.serializer.SAXToReceiver;
import org.exist.xquery.value.BinaryValue;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* @author Dulip Withanage <dulip.withanage@gmail.com>
* @version 1.0
*/
public class ContentExtraction {
final Parser parser = new AutoDetectParser();
final ParseContext parseContext = new ParseContext();
public ContentExtraction() {
parseContext.set(Parser.class, parser);
}
public void extractContentAndMetadata(BinaryValue binaryValue, ContentHandler contentHandler) throws IOException, SAXException, ContentExtractionException {
Metadata metadata = new Metadata();
try {
parser.parse(binaryValue.getInputStream(), contentHandler, metadata, parseContext);
} catch (TikaException e) {
throw new ContentExtractionException("Problem with content extraction library: " + e.getMessage(), e);
}
}
public void extractContentAndMetadata(BinaryValue binaryValue, Receiver receiver)
throws IOException, SAXException, ContentExtractionException {
extractContentAndMetadata(binaryValue, new SAXToReceiver(receiver));
}
public void extractMetadata(BinaryValue binaryValue, ContentHandler contentHandler) throws IOException, SAXException, ContentExtractionException {
Metadata metadata = new Metadata();
try {
parser.parse(binaryValue.getInputStream(),
new AbortAfterMetadataContentHandler(contentHandler), metadata, parseContext);
} catch (TikaException e) {
throw new ContentExtractionException("Problem with content extraction library: " + e.getMessage(), e);
} catch (AbortedAfterMetadataException ame) {
//do nothing, we have finished with the document
}
}
}