/*
* 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.xmp.convert;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.DublinCore;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.metadata.Property;
import org.apache.tika.metadata.XMPRights;
import org.apache.tika.metadata.Property.PropertyType;
import com.adobe.xmp.XMPException;
import com.adobe.xmp.XMPMeta;
import com.adobe.xmp.XMPMetaFactory;
import com.adobe.xmp.XMPSchemaRegistry;
import com.adobe.xmp.options.PropertyOptions;
/**
* Trys to convert as much of the properties in the <code>Metadata</code> map to XMP namespaces.
* only those properties will be cnverted where the name contains a prefix and this prefix
* correlates with a "known" prefix for a standard namespace. For example "dc:title" would be mapped
* to the "title" property in the DublinCore namespace.
*/
public class GenericConverter extends AbstractConverter {
public GenericConverter() throws TikaException {
super();
}
@Override
public XMPMeta process(Metadata metadata) throws XMPException {
setMetadata( metadata );
XMPSchemaRegistry registry = XMPMetaFactory.getSchemaRegistry();
String[] keys = metadata.names();
for (String key : keys) {
String[] keyParts = key.split( Metadata.NAMESPACE_PREFIX_DELIMITER );
if (keyParts.length > 0 && keyParts.length <= 2) {
String uri = registry.getNamespaceURI( keyParts[0] );
if (uri != null) {
// Tika properties where the type differs from the XMP specification
if (key.equals( DublinCore.TITLE.getName() )
|| key.equals( DublinCore.DESCRIPTION.getName() )
|| key.equals( XMPRights.USAGE_TERMS.getName() )) {
createLangAltProperty( key, uri, keyParts[1] );
}
else if (key.equals( DublinCore.CREATOR.getName() )) {
createArrayProperty( key, uri, keyParts[1], PropertyOptions.ARRAY_ORDERED );
}
else {
PropertyType type = Property.getPropertyType( key );
if (type != null) {
switch (type) {
case SIMPLE:
createProperty( key, uri, keyParts[1] );
break;
case BAG:
createArrayProperty( key, uri, keyParts[1],
PropertyOptions.ARRAY );
break;
case SEQ:
createArrayProperty( key, uri, keyParts[1],
PropertyOptions.ARRAY_ORDERED );
break;
case ALT:
createArrayProperty( key, uri, keyParts[1],
PropertyOptions.ARRAY_ALTERNATE );
break;
// TODO Add support for structs and lang-alts, but those types are
// currently not used in Tika
}
}
}
}
} // ignore keys that are not qualified
}
return getXMPMeta();
}
@Override
public Set<Namespace> getAdditionalNamespaces() {
// no additional namespaces needed
return Collections.unmodifiableSet( new HashSet<Namespace>() );
}
}