/*
* 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.exoplatform.services.jcr.impl.core.query.lucene.synonym;
import org.apache.lucene.index.memory.SynonymMap;
import org.exoplatform.services.jcr.impl.core.query.lucene.SynonymProvider;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import java.io.IOException;
import java.io.InputStream;
/**
* <code>WordNetSynonyms</code> implements a {@link SynonymProvider} that is backed by the WordNet
* prolog file <a href="http://www.cogsci.princeton.edu/2.0/WNprolog-2.0.tar.gz">wn_s.pl</a>.
*/
public class WordNetSynonyms implements SynonymProvider
{
private static final Log LOG = ExoLogger.getLogger("exo.jcr.component.core.WordNetSynonyms");
/**
* The synonym map or <code>null</code> if an error occurred while reading the prolog file.
*/
private SynonymMap SYNONYM_MAP;
/**
* {@inheritDoc}
*/
public void initialize(InputStream configuration) throws IOException
{
SynonymMap sm = null;
try
{
sm = new SynonymMap(configuration);
}
catch (IOException e)
{
if (LOG.isTraceEnabled())
{
LOG.trace("An exception occurred: " + e.getMessage());
}
}
SYNONYM_MAP = sm;
}
/**
* {@inheritDoc}
*/
public String[] getSynonyms(String string)
{
if (SYNONYM_MAP != null)
{
return SYNONYM_MAP.getSynonyms(string.toLowerCase());
}
else
{
return new String[0];
}
}
}