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AssertingIndexSearcher.cs
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AssertingIndexSearcher.cs
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using Lucene.Net.Index;
using Lucene.Net.Util;
using RandomizedTesting.Generators;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
namespace Lucene.Net.Search
{
/*
* 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.
*/
/// <summary>
/// Helper class that adds some extra checks to ensure correct
/// usage of <see cref="IndexSearcher"/> and <see cref="Weight"/>.
/// </summary>
public class AssertingIndexSearcher : IndexSearcher
{
internal readonly Random random;
public AssertingIndexSearcher(Random random, IndexReader r)
: base(r)
{
this.random = new J2N.Randomizer(random.NextInt64());
}
public AssertingIndexSearcher(Random random, IndexReaderContext context)
: base(context)
{
this.random = new J2N.Randomizer(random.NextInt64());
}
public AssertingIndexSearcher(Random random, IndexReader r, TaskScheduler ex)
: base(r, ex)
{
this.random = new J2N.Randomizer(random.NextInt64());
}
public AssertingIndexSearcher(Random random, IndexReaderContext context, TaskScheduler ex)
: base(context, ex)
{
this.random = new J2N.Randomizer(random.NextInt64());
}
/// <summary>
/// Ensures, that the returned <see cref="Weight"/> is not normalized again, which may produce wrong scores. </summary>
public override Weight CreateNormalizedWeight(Query query)
{
Weight w = base.CreateNormalizedWeight(query);
return new AssertingWeightAnonymousClass(random, w);
}
private class AssertingWeightAnonymousClass : AssertingWeight
{
public AssertingWeightAnonymousClass(Random random, Weight w)
: base(random, w)
{
}
public override void Normalize(float norm, float topLevelBoost)
{
throw IllegalStateException.Create("Weight already normalized.");
}
public override float GetValueForNormalization()
{
throw IllegalStateException.Create("Weight already normalized.");
}
}
public override Query Rewrite(Query original)
{
// TODO: use the more sophisticated QueryUtils.check sometimes!
QueryUtils.Check(original);
Query rewritten = base.Rewrite(original);
QueryUtils.Check(rewritten);
return rewritten;
}
protected override Query WrapFilter(Query query, Filter filter)
{
if (random.NextBoolean())
{
return base.WrapFilter(query, filter);
}
return (filter is null) ? query : new FilteredQuery(query, filter, TestUtil.RandomFilterStrategy(random));
}
protected override void Search(IList<AtomicReaderContext> leaves, Weight weight, ICollector collector)
{
// TODO: shouldn't we AssertingCollector.wrap(collector) here?
base.Search(leaves, AssertingWeight.Wrap(random, weight), collector);
}
public override string ToString()
{
return "AssertingIndexSearcher(" + base.ToString() + ")";
}
}
}