/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.xcmis.search.lucene.index.merge;
import org.xcmis.search.lucene.index.LuceneIndexDataManager;
import org.xcmis.spi.utils.Logger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashSet;
/**
* Created by The eXo Platform SAS.
*
* @author <a href="mailto:Sergey.Kabashnyuk@gmail.com">Sergey Kabashnyuk</a>
* @version $Id: DocumentCountAggregatePolicy.java 2 2010-02-04 17:21:49Z andrew00x $
*/
public class DocumentCountAggregatePolicy extends IndexSizeAggregatePolicy
{
/**
* Class logger.
*/
private final Logger log = Logger.getLogger(DocumentCountAggregatePolicy.class);
/**
* Maximum number documents for memory index chain.
*/
public static final int DEFAULT_MAX_DOCUMENTS_4_DIR = 150;
/**
* Maximum number documents for memory index chain.
*/
public static final int DEFAULT_MIN_DOCUMENTS_4_DIR = 0;
private int maxDocuments4Dir;
private int minDocuments4Dir;
public DocumentCountAggregatePolicy()
{
super();
this.maxDocuments4Dir = DEFAULT_MAX_DOCUMENTS_4_DIR;
this.minDocuments4Dir = DEFAULT_MIN_DOCUMENTS_4_DIR;
}
public int getMinDocuments4Dir()
{
return minDocuments4Dir;
}
public void setMinDocuments4Dir(int minDocuments4Dir)
{
this.minDocuments4Dir = minDocuments4Dir;
}
/**
* @return Maximum number documents for index chain.
*/
public int getMaxDocuments4Dir()
{
return maxDocuments4Dir;
}
/**
* @param maxDocuments4Dir set maximum number documents for index chain.
*/
public void setMaxDocuments4Dir(int maxDocuments4Dir)
{
this.maxDocuments4Dir = maxDocuments4Dir;
}
/**
* {@inheritDoc}
*/
@Override
public Collection<LuceneIndexDataManager> findIndexDataManagerToAggrigate(
Collection<LuceneIndexDataManager> aggregateCandidat, long requiredCandidatCount, long reguiredTotalCandidatSize)
{
Collection<LuceneIndexDataManager> result = null;
if (requiredCandidatCount == 0 && reguiredTotalCandidatSize == 0)
{
result =
new HashSet<LuceneIndexDataManager>(super.findIndexDataManagerToAggrigate(aggregateCandidat,
requiredCandidatCount, reguiredTotalCandidatSize));
for (LuceneIndexDataManager luceneIndexDataManager : aggregateCandidat)
{
if (minDocuments4Dir < luceneIndexDataManager.getDocumentCount()
&& luceneIndexDataManager.getDocumentCount() < maxDocuments4Dir)
{
// log.info("Aggrigate by doc count " +
// luceneIndexDataManager.getDocumentCount() + " min="
// + (minDocuments4Dir < luceneIndexDataManager.getDocumentCount()) +
// " max="
// + (luceneIndexDataManager.getDocumentCount() < maxDocuments4Dir));
result.add(luceneIndexDataManager);
}
}
result.addAll(super.findIndexDataManagerToAggrigate(aggregateCandidat, requiredCandidatCount,
reguiredTotalCandidatSize));
}
else
{
if (requiredCandidatCount < aggregateCandidat.size())
{
result = new ArrayList<LuceneIndexDataManager>();
LuceneIndexDataManager[] indexes = new LuceneIndexDataManager[aggregateCandidat.size()];
aggregateCandidat.toArray(indexes);
Arrays.sort(indexes, new DocumentCountComparator());
int i = 0;
while (result.size() < requiredCandidatCount && i < indexes.length)
{
LuceneIndexDataManager index = indexes[i++];
if (minDocuments4Dir < index.getDocumentCount() && index.getDocumentCount() < maxDocuments4Dir)
{
result.add(index);
}
}
}
else
{
result = aggregateCandidat;
}
}
return result;
}
/**
*
*
*
*/
public class DocumentCountComparator implements Comparator<LuceneIndexDataManager>
{
/**
* {@inheritDoc}
*/
public int compare(LuceneIndexDataManager o1, LuceneIndexDataManager o2)
{
return (int)(o1.getDocumentCount() - o2.getDocumentCount());
}
};
}