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Lucene example source code file (TestBooleanOr.java)

This example Lucene source code file (TestBooleanOr.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

booleanclause, booleanclause, booleanquery, booleanquery, exception, field_c, field_t, io, ioexception, ioexception, override, randomindexwriter, term, termquery, termquery

The Lucene TestBooleanOr.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 java.io.IOException;

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;

public class TestBooleanOr extends LuceneTestCase {

  private static String FIELD_T = "T";
  private static String FIELD_C = "C";

  private TermQuery t1 = new TermQuery(new Term(FIELD_T, "files"));
  private TermQuery t2 = new TermQuery(new Term(FIELD_T, "deleting"));
  private TermQuery c1 = new TermQuery(new Term(FIELD_C, "production"));
  private TermQuery c2 = new TermQuery(new Term(FIELD_C, "optimize"));

  private IndexSearcher searcher = null;
  private Directory dir;
  private IndexReader reader;
  

  private int search(Query q) throws IOException {
    QueryUtils.check(random, q,searcher);
    return searcher.search(q, null, 1000).totalHits;
  }

  public void testElements() throws IOException {
    assertEquals(1, search(t1));
    assertEquals(1, search(t2));
    assertEquals(1, search(c1));
    assertEquals(1, search(c2));
  }

  /**
   * <code>T:files T:deleting C:production C:optimize 
   * it works.
   *
   * @throws IOException
   */
  public void testFlat() throws IOException {
    BooleanQuery q = new BooleanQuery();
    q.add(new BooleanClause(t1, BooleanClause.Occur.SHOULD));
    q.add(new BooleanClause(t2, BooleanClause.Occur.SHOULD));
    q.add(new BooleanClause(c1, BooleanClause.Occur.SHOULD));
    q.add(new BooleanClause(c2, BooleanClause.Occur.SHOULD));
    assertEquals(1, search(q));
  }

  /**
   * <code>(T:files T:deleting) (+C:production +C:optimize)
   * it works.
   *
   * @throws IOException
   */
  public void testParenthesisMust() throws IOException {
    BooleanQuery q3 = new BooleanQuery();
    q3.add(new BooleanClause(t1, BooleanClause.Occur.SHOULD));
    q3.add(new BooleanClause(t2, BooleanClause.Occur.SHOULD));
    BooleanQuery q4 = new BooleanQuery();
    q4.add(new BooleanClause(c1, BooleanClause.Occur.MUST));
    q4.add(new BooleanClause(c2, BooleanClause.Occur.MUST));
    BooleanQuery q2 = new BooleanQuery();
    q2.add(q3, BooleanClause.Occur.SHOULD);
    q2.add(q4, BooleanClause.Occur.SHOULD);
    assertEquals(1, search(q2));
  }

  /**
   * <code>(T:files T:deleting) +(C:production C:optimize)
   * not working. results NO HIT.
   *
   * @throws IOException
   */
  public void testParenthesisMust2() throws IOException {
    BooleanQuery q3 = new BooleanQuery();
    q3.add(new BooleanClause(t1, BooleanClause.Occur.SHOULD));
    q3.add(new BooleanClause(t2, BooleanClause.Occur.SHOULD));
    BooleanQuery q4 = new BooleanQuery();
    q4.add(new BooleanClause(c1, BooleanClause.Occur.SHOULD));
    q4.add(new BooleanClause(c2, BooleanClause.Occur.SHOULD));
    BooleanQuery q2 = new BooleanQuery();
    q2.add(q3, BooleanClause.Occur.SHOULD);
    q2.add(q4, BooleanClause.Occur.MUST);
    assertEquals(1, search(q2));
  }

  /**
   * <code>(T:files T:deleting) (C:production C:optimize)
   * not working. results NO HIT.
   *
   * @throws IOException
   */
  public void testParenthesisShould() throws IOException {
    BooleanQuery q3 = new BooleanQuery();
    q3.add(new BooleanClause(t1, BooleanClause.Occur.SHOULD));
    q3.add(new BooleanClause(t2, BooleanClause.Occur.SHOULD));
    BooleanQuery q4 = new BooleanQuery();
    q4.add(new BooleanClause(c1, BooleanClause.Occur.SHOULD));
    q4.add(new BooleanClause(c2, BooleanClause.Occur.SHOULD));
    BooleanQuery q2 = new BooleanQuery();
    q2.add(q3, BooleanClause.Occur.SHOULD);
    q2.add(q4, BooleanClause.Occur.SHOULD);
    assertEquals(1, search(q2));
  }

  @Override
  public void setUp() throws Exception {
    super.setUp();

    //
    dir = newDirectory();


    //
    RandomIndexWriter writer = new RandomIndexWriter(random, dir);

    //
    Document d = new Document();
    d.add(newField(
        FIELD_T,
        "Optimize not deleting all files",
        Field.Store.YES,
        Field.Index.ANALYZED));
    d.add(newField(
        FIELD_C,
        "Deleted When I run an optimize in our production environment.",
        Field.Store.YES,
        Field.Index.ANALYZED));

    //
    writer.addDocument(d);

    reader = writer.getReader();
    //
    searcher = newSearcher(reader);
    writer.close();
  }

  @Override
  public void tearDown() throws Exception {
    searcher.close();
    reader.close();
    dir.close();
    super.tearDown();
  }
}

Other Lucene examples (source code examples)

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