/**
* 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.lucene.gdata.storage.lucenestorage;
import java.io.IOException;
import java.io.StringWriter;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.gdata.data.ServerBaseFeed;
import org.apache.lucene.gdata.server.registry.ProvidedService;
import com.google.gdata.data.BaseFeed;
import com.google.gdata.util.common.xml.XmlWriter;
/**
* This immutable class wrapps <tt>GDataAccount</tt> instances for an internal Storage representation of
* an account. This class also acts as a Documentfactory for lucene documents to
* be stored inside the index.
* @author Simon Willnauer
*
*/
public class StorageFeedWrapper implements StorageWrapper {
private static final String INTERNAL_ENCODING = "UTF-8";
/**
* the account who owns the feed
*/
public static final String FIELD_ACCOUNTREFERENCE = "accountReference";
/**
* the id of the feed
*/
public static final String FIELD_FEED_ID = "feedId";
/**
* The xml feed representation
*/
public static final String FIELD_CONTENT = "content";
/**
* The creation timestamp
*/
public static final String FIELD_TIMESTAMP = "timestamp";
/**
* The Service this feed belongs to.
*/
public static final String FIELD_SERVICE_ID = "serviceId";
private final ServerBaseFeed feed;
private final String accountName;
private final ProvidedService config;
private final String content;
/**
* @param feed
* @param accountname
* @throws IOException
*
*/
public StorageFeedWrapper(final ServerBaseFeed feed, final String accountname) throws IOException {
this.feed = feed;
this.accountName = accountname;
this.config = feed.getServiceConfig();
this.content = buildContent();
}
/**
* @see org.apache.lucene.gdata.storage.lucenestorage.StorageWrapper#getLuceneDocument()
*/
public Document getLuceneDocument() {
Document doc = new Document();
doc.add(new Field(FIELD_ACCOUNTREFERENCE,this.accountName,Field.Store.YES,Field.Index.UN_TOKENIZED));
doc.add(new Field(FIELD_FEED_ID,this.feed.getId(),Field.Store.YES,Field.Index.UN_TOKENIZED));
doc.add(new Field(FIELD_CONTENT,this.content,Field.Store.COMPRESS,Field.Index.NO));
doc.add(new Field(FIELD_SERVICE_ID,this.feed.getServiceType(),Field.Store.YES,Field.Index.NO));
return doc;
}
private String buildContent() throws IOException {
StringWriter writer = new StringWriter();
XmlWriter xmlWriter = new XmlWriter(writer, INTERNAL_ENCODING);
this.feed.generateAtom(xmlWriter,this.config.getExtensionProfile());
return writer.toString();
}
/**
* @return - the wrapped feed
*/
public BaseFeed getFeed(){
return this.feed.getFeed();
}
}