org.apache.lucene.search.AssertingIndexSearcher.java Source code

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Here is the source code for org.apache.lucene.search.AssertingIndexSearcher.java

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/*
 * 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.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexReaderContext;
import org.apache.lucene.index.LeafReaderContext;

/**
 * Helper class that adds some extra checks to ensure correct
 * usage of {@code IndexSearcher} and {@code Weight}.
 */
public class AssertingIndexSearcher extends IndexSearcher {
    final Random random;

    public AssertingIndexSearcher(Random random, IndexReader r) {
        super(r);
        this.random = new Random(random.nextLong());
    }

    public AssertingIndexSearcher(Random random, IndexReaderContext context) {
        super(context);
        this.random = new Random(random.nextLong());
    }

    public AssertingIndexSearcher(Random random, IndexReader r, ExecutorService ex) {
        super(r, ex);
        this.random = new Random(random.nextLong());
    }

    public AssertingIndexSearcher(Random random, IndexReaderContext context, ExecutorService ex) {
        super(context, ex);
        this.random = new Random(random.nextLong());
    }

    @Override
    public Weight createWeight(Query query, ScoreMode scoreMode, float boost) throws IOException {
        // this adds assertions to the inner weights/scorers too
        return new AssertingWeight(random, super.createWeight(query, scoreMode, boost), scoreMode);
    }

    @Override
    public Query rewrite(Query original) throws IOException {
        // TODO: use the more sophisticated QueryUtils.check sometimes!
        QueryUtils.check(original);
        Query rewritten = super.rewrite(original);
        QueryUtils.check(rewritten);
        return rewritten;
    }

    @Override
    protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException {
        assert weight instanceof AssertingWeight;
        super.search(leaves, weight, AssertingCollector.wrap(collector));
    }

    @Override
    public String toString() {
        return "AssertingIndexSearcher(" + super.toString() + ")";
    }

}