package com.browseengine.bobo.facets.filter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import com.kamikaze.docidset.impl.AndDocIdSet;
public class AndFilter extends Filter
{
private static final long serialVersionUID = 1L;
private final List<? extends Filter> _filters;
public AndFilter(List<? extends Filter> filters)
{
_filters = filters;
}
@Override
public DocIdSet getDocIdSet(IndexReader reader) throws IOException
{
if (_filters.size() == 1)
{
return _filters.get(0).getDocIdSet(reader);
}
else
{
List<DocIdSet> list = new ArrayList<DocIdSet>(_filters.size());
for (Filter f : _filters)
{
list.add(f.getDocIdSet(reader));
}
return new AndDocIdSet(list);
}
}
}