/*
* 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.image.xmp;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Iterator;
import java.util.List;
import org.apache.jempbox.xmp.XMPMetadata;
import org.apache.jempbox.xmp.XMPSchemaDublinCore;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.DublinCore;
import org.apache.tika.metadata.Metadata;
import org.xml.sax.InputSource;
public class JempboxExtractor {
private XMPPacketScanner scanner = new XMPPacketScanner();
private Metadata metadata;
// The XMP spec says it must be unicode, but for most file formats it specifies "must be encoded in UTF-8"
private static final String DEFAULT_XMP_CHARSET = "UTF-8";
public JempboxExtractor(Metadata metadata) {
this.metadata = metadata;
}
public void parse(InputStream file)
throws IOException, TikaException {
ByteArrayOutputStream xmpraw = new ByteArrayOutputStream();
boolean found = scanner.parse(file, xmpraw);
file.close();
if (!found) {
return;
}
Reader decoded = new InputStreamReader(new ByteArrayInputStream(xmpraw.toByteArray()), DEFAULT_XMP_CHARSET);
XMPMetadata xmp = XMPMetadata.load(new InputSource(decoded));
XMPSchemaDublinCore dc = xmp.getDublinCoreSchema();
if (dc != null) {
if (dc.getTitle() != null) {
metadata.set(DublinCore.TITLE, dc.getTitle());
}
if (dc.getDescription() != null) {
metadata.set(DublinCore.DESCRIPTION, dc.getDescription());
}
if (dc.getCreators() != null && dc.getCreators().size() > 0) {
metadata.set(DublinCore.CREATOR, joinCreators(dc.getCreators()));
}
if (dc.getSubjects() != null && dc.getSubjects().size() > 0) {
Iterator<String> keywords = dc.getSubjects().iterator();
while (keywords.hasNext()) {
metadata.add(DublinCore.SUBJECT, keywords.next());
}
// TODO should we set KEYWORDS too?
// All tested photo managers set the same in Iptc.Application2.Keywords and Xmp.dc.subject
}
}
}
protected String joinCreators(List<String> creators) {
if (creators == null || creators.size() == 0) {
return "";
}
if (creators.size() == 1) {
return creators.get(0);
}
StringBuffer c = new StringBuffer();
for (String s : creators) {
c.append(", ").append(s);
}
return c.substring(2);
}
}