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package org.apache.lucene.search;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import java.io.IOException;
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import junit.framework.Assert;
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import org.apache.lucene.index.IndexReader;
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* A unit test helper class to test when the filter is getting cached and when it is not.
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public class CachingWrapperFilterHelper extends CachingWrapperFilter {
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private boolean shouldHaveCache = false;
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* @param filter Filter to cache results of
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public CachingWrapperFilterHelper(Filter filter) {
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public void setShouldHaveCache(boolean shouldHaveCache) {
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this.shouldHaveCache = shouldHaveCache;
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public synchronized DocIdSet getDocIdSet(IndexReader reader) throws IOException {
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final int saveMissCount = missCount;
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DocIdSet docIdSet = super.getDocIdSet(reader);
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if (shouldHaveCache) {
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Assert.assertEquals("Cache should have data ", saveMissCount, missCount);
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Assert.assertTrue("Cache should be null " + docIdSet, missCount > saveMissCount);
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public String toString() {
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return "CachingWrapperFilterHelper("+filter+")";
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public boolean equals(Object o) {
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if (!(o instanceof CachingWrapperFilterHelper)) return false;
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return this.filter.equals(o);
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public int hashCode() {
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return this.filter.hashCode() ^ 0x5525aacb;