NotFilter.java

package com.browseengine.bobo.facets.filter;

import java.io.IOException;

import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.Bits;

import com.browseengine.bobo.docidset.NotDocIdSet;

public class NotFilter extends Filter {

  private final Filter _innerFilter;

  public NotFilter(Filter innerFilter) {
    _innerFilter = innerFilter;
  }

  @Override
  public DocIdSet getDocIdSet(AtomicReaderContext context, Bits acceptDocs) throws IOException {
    return new NotDocIdSet(_innerFilter.getDocIdSet(context, acceptDocs), context.reader().maxDoc());
  }

}