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.index.AtomicReaderContext;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.util.LuceneTestCase;
import org.junit.Test;
public class MultiCollectorTest extends LuceneTestCase {
private static class DummyCollector extends Collector {
boolean acceptsDocsOutOfOrderCalled = false;
boolean collectCalled = false;
boolean setNextReaderCalled = false;
boolean setScorerCalled = false;
@Override
public boolean acceptsDocsOutOfOrder() {
acceptsDocsOutOfOrderCalled = true;
return true;
}
@Override
public void collect(int doc) throws IOException {
collectCalled = true;
}
@Override
public void setNextReader(AtomicReaderContext context) throws IOException {
setNextReaderCalled = true;
}
@Override
public void setScorer(Scorer scorer) throws IOException {
setScorerCalled = 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);
assertTrue(c.acceptsDocsOutOfOrder());
c.collect(1);
c.setNextReader(null);
c.setScorer(null);
}
@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);
assertTrue(c.acceptsDocsOutOfOrder());
c.collect(1);
c.setNextReader(null);
c.setScorer(null);
for (DummyCollector dc : dcs) {
assertTrue(dc.acceptsDocsOutOfOrderCalled);
assertTrue(dc.collectCalled);
assertTrue(dc.setNextReaderCalled);
assertTrue(dc.setScorerCalled);
}
}
}