| /* |
| * 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.lucene.search; |
| |
| import java.io.IOException; |
| import java.util.Random; |
| |
| import org.apache.lucene.index.IndexReader; |
| |
| /** Assertion-enabled query. */ |
| public final class AssertingQuery extends Query { |
| |
| private final Random random; |
| private final Query in; |
| |
| /** Sole constructor. */ |
| public AssertingQuery(Random random, Query in) { |
| this.random = random; |
| this.in = in; |
| } |
| |
| /** Wrap a query if necessary. */ |
| public static Query wrap(Random random, Query query) { |
| return query instanceof AssertingQuery ? query : new AssertingQuery(random, query); |
| } |
| |
| @Override |
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException { |
| assert boost >= 0; |
| return new AssertingWeight(new Random(random.nextLong()), in.createWeight(searcher, scoreMode, boost), scoreMode); |
| } |
| |
| @Override |
| public String toString(String field) { |
| return in.toString(field); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return sameClassAs(other) && |
| in.equals(((AssertingQuery) other).in); |
| } |
| |
| @Override |
| public int hashCode() { |
| return -in.hashCode(); |
| } |
| |
| public Random getRandom() { |
| return random; |
| } |
| |
| public Query getIn() { |
| return in; |
| } |
| |
| @Override |
| public Query rewrite(IndexReader reader) throws IOException { |
| final Query rewritten = in.rewrite(reader); |
| if (rewritten == in) { |
| return super.rewrite(reader); |
| } else { |
| return wrap(new Random(random.nextLong()), rewritten); |
| } |
| } |
| |
| @Override |
| public void visit(QueryVisitor visitor) { |
| in.visit(visitor); |
| } |
| |
| } |