/*
* Copyright (c) 2009-2010 Lockheed Martin Corporation
*
* Licensed 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.eurekastreams.commons.search.analysis;
import java.io.InputStream;
import java.util.Arrays;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.lucene.index.memory.SynonymMap;
/**
* Factory to return a singleton SynonymMap.
*/
public final class SynonymMapFactory
{
/**
* Private empty constructor for this singleton.
*/
private SynonymMapFactory()
{
// no-op
}
/**
* Singleton Synonym map.
*/
private static SynonymMap synonyms = null;
/**
* Initialize the synonym map.
*
* @param thesaurusInputStream
* InputStream of the WordNet synonyms file
* @return true
*/
public static boolean inform(final InputStream thesaurusInputStream)
{
if (synonyms == null)
{
synchronized (SynonymMapFactory.class)
{
Log initLog = LogFactory.getLog(SynonymMapFactory.class);
initLog.debug("Initializing SynonymMap.");
try
{
// NOTE: the synonym stream is closed inside SynonymMap
synonyms = new SynonymMap(thesaurusInputStream);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
initLog.info("Testing SynonymMap.");
if (initLog.isInfoEnabled())
{
initLog.info("Synonyms for 'success': " + Arrays.toString(synonyms.getSynonyms("success")));
}
initLog.info("SynonymMap initializing complete.");
}
}
return true;
}
/**
* Get the singleton SynonymMap.
*
* @return the singleton SynonymMap.
*/
public static SynonymMap getSynonymMap()
{
if (synonyms == null)
{
throw new RuntimeException("Synonyms not yet loaded.");
}
return synonyms;
}
}