/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. 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.jackrabbit.core.query;
import javax.jcr.RepositoryException;
import org.apache.jackrabbit.core.query.lucene.FieldNames;
import org.apache.jackrabbit.core.state.PropertyState;
import org.apache.jackrabbit.core.value.BLOBFileValue;
import org.apache.jackrabbit.core.value.InternalValue;
import java.io.IOException;
import java.io.StringReader;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipEntry;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;
/**
* Extracts texts from OpenOffice document data.
*/
public class OpenOfficeTextFilter implements TextFilter {
private XMLReader xmlReader;
public boolean canFilter(String mimeType) {
return "application/vnd.oasis.opendocument.database".equalsIgnoreCase(mimeType) ||
"application/vnd.oasis.opendocument.formula".equalsIgnoreCase(mimeType) ||
"application/vnd.oasis.opendocument.graphics".equalsIgnoreCase(mimeType) ||
"application/vnd.oasis.opendocument.presentation".equalsIgnoreCase(mimeType) ||
"application/vnd.oasis.opendocument.spreadsheet".equalsIgnoreCase(mimeType) ||
"application/vnd.oasis.opendocument.text".equalsIgnoreCase(mimeType);
}
public Map doFilter(PropertyState data, String encoding)
throws RepositoryException {
if (xmlReader == null) {
initParser();
}
InternalValue[] values = data.getValues();
if (values.length > 0) {
final BLOBFileValue blob = (BLOBFileValue) values[0].internalValue();
LazyReader reader = new LazyReader() {
protected void initializeReader() throws IOException {
InputStream in;
try {
in = blob.getStream();
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
try {
ZipInputStream zis = new ZipInputStream(in);
ZipEntry ze = zis.getNextEntry();
while (!ze.getName().equals("content.xml")) {
ze = zis.getNextEntry();
}
OOoContentHandler contentHandler = new OOoContentHandler();
xmlReader.setContentHandler(contentHandler);
try {
xmlReader.parse(new InputSource(zis));
} catch (SAXException e) {
throw new IOException(e.getMessage());
} finally {
zis.close();
}
delegate = new StringReader(contentHandler.getContent());
} finally {
in.close();
}
}
};
Map result = new HashMap();
result.put(FieldNames.FULLTEXT, reader);
return result;
} else {
// multi value not supported
throw new RepositoryException("Multi-valued binary properties not supported.");
}
}
private void initParser() throws RepositoryException {
try {
SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
saxParserFactory.setValidating(false);
SAXParser saxParser = saxParserFactory.newSAXParser();
xmlReader = saxParser.getXMLReader();
xmlReader.setFeature("http://xml.org/sax/features/validation", false);
xmlReader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
} catch (Exception e) {
throw new RepositoryException(e);
}
}
}