+++ /dev/null
-package org.apache.lucene.search;
-
-/**
- * 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.
- */
-
-import java.io.IOException;
-import java.util.Iterator;
-import java.util.Set;
-import java.util.TreeSet;
-
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.index.TermDocs;
-import org.apache.lucene.util.FixedBitSet;
-
-/**
- * Constructs a filter for docs matching any of the terms added to this class.
- * Unlike a RangeFilter this can be used for filtering on multiple terms that are not necessarily in
- * a sequence. An example might be a collection of primary keys from a database query result or perhaps
- * a choice of "category" labels picked by the end user. As a filter, this is much faster than the
- * equivalent query (a BooleanQuery with many "should" TermQueries)
- *
- */
-public class TermsFilter extends Filter
-{
- Set<Term> terms=new TreeSet<Term>();
-
- /**
- * Adds a term to the list of acceptable terms
- * @param term
- */
- public void addTerm(Term term)
- {
- terms.add(term);
- }
-
-/* (non-Javadoc)
- * @see org.apache.lucene.search.Filter#getDocIdSet(org.apache.lucene.index.IndexReader)
- */
- @Override
- public DocIdSet getDocIdSet(IndexReader reader) throws IOException
- {
- FixedBitSet result=new FixedBitSet(reader.maxDoc());
- TermDocs td = reader.termDocs();
- try
- {
- for (Iterator<Term> iter = terms.iterator(); iter.hasNext();)
- {
- Term term = iter.next();
- td.seek(term);
- while (td.next())
- {
- result.set(td.doc());
- }
- }
- }
- finally
- {
- td.close();
- }
- return result;
- }
-
- @Override
- public boolean equals(Object obj)
- {
- if(this == obj)
- return true;
- if((obj == null) || (obj.getClass() != this.getClass()))
- return false;
- TermsFilter test = (TermsFilter)obj;
- return (terms == test.terms ||
- (terms != null && terms.equals(test.terms)));
- }
-
- @Override
- public int hashCode()
- {
- int hash=9;
- for (Iterator<Term> iter = terms.iterator(); iter.hasNext();)
- {
- Term term = iter.next();
- hash = 31 * hash + term.hashCode();
- }
- return hash;
- }
-
-}