| package org.apache.lucene.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. |
| */ |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.index.DirectoryReader; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.RandomIndexWriter; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.junit.Test; |
| |
| public class MultiCollectorTest extends LuceneTestCase { |
| |
| private static class DummyCollector extends SimpleCollector { |
| |
| boolean collectCalled = false; |
| boolean setNextReaderCalled = false; |
| boolean setScorerCalled = false; |
| |
| @Override |
| public void collect(int doc) throws IOException { |
| collectCalled = true; |
| } |
| |
| @Override |
| protected void doSetNextReader(LeafReaderContext context) throws IOException { |
| setNextReaderCalled = true; |
| } |
| |
| @Override |
| public void setScorer(Scorer scorer) throws IOException { |
| setScorerCalled = true; |
| } |
| |
| @Override |
| public boolean needsScores() { |
| return true; |
| } |
| } |
| |
| @Test |
| public void testNullCollectors() throws Exception { |
| // Tests that the collector rejects all null collectors. |
| try { |
| MultiCollector.wrap(null, null); |
| fail("only null collectors should not be supported"); |
| } catch (IllegalArgumentException e) { |
| // expected |
| } |
| |
| // Tests that the collector handles some null collectors well. If it |
| // doesn't, an NPE would be thrown. |
| Collector c = MultiCollector.wrap(new DummyCollector(), null, new DummyCollector()); |
| assertTrue(c instanceof MultiCollector); |
| final LeafCollector ac = c.getLeafCollector(null); |
| ac.collect(1); |
| c.getLeafCollector(null); |
| c.getLeafCollector(null).setScorer(new FakeScorer()); |
| } |
| |
| @Test |
| public void testSingleCollector() throws Exception { |
| // Tests that if a single Collector is input, it is returned (and not MultiCollector). |
| DummyCollector dc = new DummyCollector(); |
| assertSame(dc, MultiCollector.wrap(dc)); |
| assertSame(dc, MultiCollector.wrap(dc, null)); |
| } |
| |
| @Test |
| public void testCollector() throws Exception { |
| // Tests that the collector delegates calls to input collectors properly. |
| |
| // Tests that the collector handles some null collectors well. If it |
| // doesn't, an NPE would be thrown. |
| DummyCollector[] dcs = new DummyCollector[] { new DummyCollector(), new DummyCollector() }; |
| Collector c = MultiCollector.wrap(dcs); |
| LeafCollector ac = c.getLeafCollector(null); |
| ac.collect(1); |
| ac = c.getLeafCollector(null); |
| ac.setScorer(new FakeScorer()); |
| |
| for (DummyCollector dc : dcs) { |
| assertTrue(dc.collectCalled); |
| assertTrue(dc.setNextReaderCalled); |
| assertTrue(dc.setScorerCalled); |
| } |
| |
| } |
| |
| private static Collector collector(final boolean needsScores, final Class<?> expectedScorer) { |
| return new Collector() { |
| |
| @Override |
| public LeafCollector getLeafCollector(LeafReaderContext context) throws IOException { |
| return new LeafCollector() { |
| |
| @Override |
| public void setScorer(Scorer scorer) throws IOException { |
| assertEquals(expectedScorer, scorer.getClass()); |
| } |
| |
| @Override |
| public void collect(int doc) throws IOException {} |
| |
| }; |
| } |
| |
| @Override |
| public boolean needsScores() { |
| return needsScores; |
| } |
| |
| }; |
| } |
| |
| public void testCacheScoresIfNecessary() throws IOException { |
| Directory dir = newDirectory(); |
| RandomIndexWriter iw = new RandomIndexWriter(random(), dir); |
| iw.addDocument(new Document()); |
| iw.commit(); |
| DirectoryReader reader = iw.getReader(); |
| iw.close(); |
| |
| final LeafReaderContext ctx = reader.leaves().get(0); |
| |
| try { |
| collector(false, ScoreCachingWrappingScorer.class).getLeafCollector(ctx).setScorer(new FakeScorer()); |
| fail("The collector was configured to expect a ScoreCachingWrappingScorer and did not fail when pass in a FakeScorer"); |
| } catch (AssertionError e) { |
| // expected |
| } |
| |
| // no collector needs scores => no caching |
| Collector c1 = collector(false, FakeScorer.class); |
| Collector c2 = collector(false, FakeScorer.class); |
| MultiCollector.wrap(c1, c2).getLeafCollector(ctx).setScorer(new FakeScorer()); |
| |
| // only one collector needs scores => no caching |
| c1 = collector(true, FakeScorer.class); |
| c2 = collector(false, FakeScorer.class); |
| MultiCollector.wrap(c1, c2).getLeafCollector(ctx).setScorer(new FakeScorer()); |
| |
| // several collectors need scores => caching |
| c1 = collector(true, ScoreCachingWrappingScorer.class); |
| c2 = collector(true, ScoreCachingWrappingScorer.class); |
| MultiCollector.wrap(c1, c2).getLeafCollector(ctx).setScorer(new FakeScorer()); |
| |
| reader.close(); |
| dir.close(); |
| } |
| } |