| /* |
| * 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.io.IOException; |
| |
| import org.apache.lucene.index.FilterLeafReader.FilterPostingsEnum; |
| import org.apache.lucene.index.PostingsEnum; |
| import org.apache.lucene.util.Bits; |
| |
| public class BitsFilteredPostingsEnum extends FilterPostingsEnum { |
| |
| public static PostingsEnum wrap(PostingsEnum in, Bits acceptDocs) { |
| if (in == null || acceptDocs == null) { |
| return in; |
| } |
| return new BitsFilteredPostingsEnum(in, acceptDocs); |
| } |
| |
| private final Bits acceptDocs; |
| |
| private BitsFilteredPostingsEnum(PostingsEnum in, Bits acceptDocs) { |
| super(in); |
| this.acceptDocs = acceptDocs; |
| } |
| |
| private int doNext(int doc) throws IOException { |
| while (doc != NO_MORE_DOCS && acceptDocs.get(doc) == false) { |
| doc = super.nextDoc(); |
| } |
| return doc; |
| } |
| |
| @Override |
| public int nextDoc() throws IOException { |
| return doNext(super.nextDoc()); |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| return doNext(super.advance(target)); |
| } |
| } |