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Lucene example source code file (TestPrefixInBooleanQuery.java)

This example Lucene source code file (TestPrefixInBooleanQuery.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

booleanquery, document, exception, exception, field, number, number, prefixquery, query, randomindexwriter, term, term, termquery, termquery

The Lucene TestPrefixInBooleanQuery.java source code

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 org.apache.lucene.util.LuceneTestCase;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.store.Directory;
import org.junit.AfterClass;
import org.junit.BeforeClass;

/**
 * https://issues.apache.org/jira/browse/LUCENE-1974
 *
 * represent the bug of 
 * 
 *    BooleanScorer.score(Collector collector, int max, int firstDocID)
 * 
 * Line 273, end=8192, subScorerDocID=11378, then more got false?
 * 
 */
public class TestPrefixInBooleanQuery extends LuceneTestCase {

  private static final String FIELD = "name";
  private static Directory directory;
  private static IndexReader reader;
  private static IndexSearcher searcher;

  @BeforeClass
  public static void beforeClass() throws Exception {
    directory = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random, directory);

    Document doc = new Document();
    Field field = newField(FIELD, "meaninglessnames", Field.Store.NO,
        Field.Index.NOT_ANALYZED_NO_NORMS);
    doc.add(field);
    
    for (int i = 0; i < 5137; ++i) {
      writer.addDocument(doc);
    }
    
    field.setValue("tangfulin");
    writer.addDocument(doc);

    field.setValue("meaninglessnames");
    for (int i = 5138; i < 11377; ++i) {
      writer.addDocument(doc);
    }
    
    field.setValue("tangfulin");
    writer.addDocument(doc);
    
    reader = writer.getReader();
    searcher = newSearcher(reader);
    writer.close();
  }
  
  @AfterClass
  public static void afterClass() throws Exception {
    searcher.close();
    searcher = null;
    reader.close();
    reader = null;
    directory.close();
    directory = null;
  }
  
  public void testPrefixQuery() throws Exception {
    Query query = new PrefixQuery(new Term(FIELD, "tang"));
    assertEquals("Number of matched documents", 2,
                 searcher.search(query, null, 1000).totalHits);
  }
  public void testTermQuery() throws Exception {
    Query query = new TermQuery(new Term(FIELD, "tangfulin"));
    assertEquals("Number of matched documents", 2,
                 searcher.search(query, null, 1000).totalHits);
  }
  public void testTermBooleanQuery() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add(new TermQuery(new Term(FIELD, "tangfulin")),
              BooleanClause.Occur.SHOULD);
    query.add(new TermQuery(new Term(FIELD, "notexistnames")),
              BooleanClause.Occur.SHOULD);
    assertEquals("Number of matched documents", 2,
                 searcher.search(query, null, 1000).totalHits);

  }
  public void testPrefixBooleanQuery() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add(new PrefixQuery(new Term(FIELD, "tang")),
              BooleanClause.Occur.SHOULD);
    query.add(new TermQuery(new Term(FIELD, "notexistnames")),
              BooleanClause.Occur.SHOULD);
    assertEquals("Number of matched documents", 2,
                 searcher.search(query, null, 1000).totalHits);
  }
}

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