lucene/contrib/queries/src/test/org/apache/lucene/search/TermsFilterTest.java

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.util.HashSet;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexReader.AtomicReaderContext;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.store.Directory;
import org.apache.lucene.index.SlowMultiReaderWrapper;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.OpenBitSet;

public class TermsFilterTest extends LuceneTestCase {
  
	public void testCachability() throws Exception
	{
		TermsFilter a=new TermsFilter();
		a.addTerm(new Term("field1","a"));
		a.addTerm(new Term("field1","b"));
		HashSet<Filter> cachedFilters=new HashSet<Filter>();
		cachedFilters.add(a);
		TermsFilter b=new TermsFilter();
		b.addTerm(new Term("field1","a"));
		b.addTerm(new Term("field1","b"));
		
		assertTrue("Must be cached",cachedFilters.contains(b));
		b.addTerm(new Term("field1","a")); //duplicate term
		assertTrue("Must be cached",cachedFilters.contains(b));
		b.addTerm(new Term("field1","c"));
		assertFalse("Must not be cached",cachedFilters.contains(b));
	}
	
	public void testMissingTerms() throws Exception {
		String fieldName="field1";
		Directory rd=newDirectory();
		RandomIndexWriter w = new RandomIndexWriter(random, rd);
		for (int i = 0; i < 100; i++) {
			Document doc=new Document();
			int term=i*10; //terms are units of 10;
	    FieldType customType = new FieldType(TextField.TYPE_UNSTORED);
	    customType.setStored(true);
	    customType.setTokenized(false);
			doc.add(newField(fieldName,""+term,customType));
			w.addDocument(doc);			
		}
		IndexReader reader = new SlowMultiReaderWrapper(w.getReader());
		assertTrue(reader.getTopReaderContext().isAtomic);
		AtomicReaderContext context = (AtomicReaderContext) reader.getTopReaderContext();
		assertTrue(context.isAtomic);
		w.close();
		
		TermsFilter tf=new TermsFilter();
		tf.addTerm(new Term(fieldName,"19"));
		OpenBitSet bits = (OpenBitSet)tf.getDocIdSet(context);
		assertEquals("Must match nothing", 0, bits.cardinality());

		tf.addTerm(new Term(fieldName,"20"));
		bits = (OpenBitSet)tf.getDocIdSet(context);
		assertEquals("Must match 1", 1, bits.cardinality());
		
		tf.addTerm(new Term(fieldName,"10"));
		bits = (OpenBitSet)tf.getDocIdSet(context);
		assertEquals("Must match 2", 2, bits.cardinality());
		
		tf.addTerm(new Term(fieldName,"00"));
		bits = (OpenBitSet)tf.getDocIdSet(context);
		assertEquals("Must match 2", 2, bits.cardinality());
		
		reader.close();
		rd.close();
	}
}