/*
* 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. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.protocol.server.adapters.hibernate;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.List;
import org.apache.abdera.Abdera;
import org.apache.abdera.ext.serializer.ConventionSerializationContext;
import org.apache.abdera.ext.serializer.impl.EntrySerializer;
import org.apache.abdera.model.Document;
import org.apache.abdera.model.Entry;
import org.apache.abdera.model.Feed;
import org.apache.abdera.model.Link;
import org.apache.abdera.parser.ParseException;
import org.apache.abdera.protocol.server.ProviderHelper;
import org.apache.abdera.writer.StreamWriter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.transform.ResultTransformer;
/**
* Converts Hibernate results into an Atom document using the Abdera Java Object Serializer
*/
public class AtomEntryResultTransformer implements ResultTransformer {
private static Log logger = LogFactory.getLog(AtomEntryResultTransformer.class);
private String feedId;
private Abdera abdera;
private Feed feed;
public AtomEntryResultTransformer(String feedId, Abdera abdera, Feed feed) {
this.feedId = feedId;
this.abdera = abdera;
this.feed = feed;
}
public List transformList(List collection) {
return collection;
}
public Object transformTuple(Object[] tuple, String[] aliases) {
try {
if (tuple.length == 1) {
StreamWriter sw = abdera.newStreamWriter();
ByteArrayOutputStream out = new ByteArrayOutputStream();
sw.setOutputStream(out).setAutoIndent(true);
ConventionSerializationContext c =
new ConventionSerializationContext(sw);
c.setSerializer(tuple[0].getClass(), new EntrySerializer());
sw.startDocument();
c.serialize(tuple[0]);
sw.endDocument();
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
Document<Entry> doc = abdera.getParser().parse(in);
Entry entry = doc.getRoot();
if (ProviderHelper.getEditUriFromEntry(entry) == null) {
entry.addLink(entry.getId().toString(), "edit");
}
entry.setId(feedId + "/" + entry.getId().toString());
entry.getEditLink().setHref(entry.getId().toString());
if (feed != null) {
feed.addEntry(entry);
}
return entry;
} else {
return tuple;
}
} catch (Exception ex) {
logger.error("error creating an entry with the row data", ex);
throw new ParseException(ex);
}
}
}