/* * Licensed to ElasticSearch and Shay Banon under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. ElasticSearch 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.elasticsearch.index.search.nested; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.Term; import org.apache.lucene.search.DocIdSet; import org.apache.lucene.search.Filter; import org.apache.lucene.search.PrefixFilter; import org.elasticsearch.index.mapper.internal.TypeFieldMapper; import java.io.IOException; public class NestedDocsFilter extends Filter { public static final NestedDocsFilter INSTANCE = new NestedDocsFilter(); private final PrefixFilter filter = new PrefixFilter(new Term(TypeFieldMapper.NAME, "__")); private final int hashCode = filter.hashCode(); private NestedDocsFilter() { } @Override public DocIdSet getDocIdSet(IndexReader reader) throws IOException { return filter.getDocIdSet(reader); } @Override public int hashCode() { return hashCode; } @Override public boolean equals(Object obj) { return obj == INSTANCE; } }