org.apache.lucene.search.PublicTermsFilter Maven / Gradle / Ivy

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There is a newer version: 8.15.1

/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.
 */

package org.apache.lucene.search;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.util.OpenBitSet;

import java.io.IOException;
import java.util.Set;

/**
 * @author kimchy (shay.banon)
 */
public class PublicTermsFilter extends TermsFilter {

    public Set getTerms() {
        return terms;
    }

    // override default impl here to use fastSet...

    @Override
    public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
        OpenBitSet result = new OpenBitSet(reader.maxDoc());
        TermDocs td = reader.termDocs();
        try {
            for (Term term : terms) {
                td.seek(term);
                while (td.next()) {
                    result.fastSet(td.doc());
                }
            }
        }
        finally {
            td.close();
        }
        return result;
    }
}