| /* |
| * 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. |
| */ |
| package org.apache.solr.search; |
| |
| import java.util.Objects; |
| |
| import org.apache.lucene.search.DocIdSet; |
| import org.apache.lucene.util.Bits; |
| |
| /** |
| * This implementation supplies a filtered DocIdSet, that excludes all |
| * docids which are not in a Bits instance. This is especially useful in |
| * {@link org.apache.solr.search.Filter} to apply the {@code acceptDocs} |
| * passed to {@code getDocIdSet()} before returning the final DocIdSet. |
| * |
| * @see DocIdSet |
| * @see org.apache.solr.search.Filter |
| */ |
| public final class BitsFilteredDocIdSet extends FilteredDocIdSet { |
| |
| private final Bits acceptDocs; |
| |
| /** |
| * Convenience wrapper method: If {@code acceptDocs == null} it returns the original set without wrapping. |
| * @param set Underlying DocIdSet. If {@code null}, this method returns {@code null} |
| * @param acceptDocs Allowed docs, all docids not in this set will not be returned by this DocIdSet. |
| * If {@code null}, this method returns the original set without wrapping. |
| */ |
| public static DocIdSet wrap(DocIdSet set, Bits acceptDocs) { |
| return (set == null || acceptDocs == null) ? set : new BitsFilteredDocIdSet(set, acceptDocs); |
| } |
| |
| /** |
| * Constructor. |
| * @param innerSet Underlying DocIdSet |
| * @param acceptDocs Allowed docs, all docids not in this set will not be returned by this DocIdSet |
| */ |
| public BitsFilteredDocIdSet(DocIdSet innerSet, Bits acceptDocs) { |
| super(innerSet); |
| this.acceptDocs = Objects.requireNonNull(acceptDocs, "Bits must not be null"); |
| } |
| |
| @Override |
| protected boolean match(int docid) { |
| return acceptDocs.get(docid); |
| } |
| |
| } |