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Lucene example source code file (FieldTermStackTest.java)

This example Lucene source code file (FieldTermStackTest.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

abstracttestcase, booleanquery, exception, exception, f, f, fieldquery, fieldquery, fieldtermstack, fieldtermstack, fieldtermstacktest, string

The Lucene FieldTermStackTest.java source code

package org.apache.lucene.search.vectorhighlight;
/**
 * 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.search.BooleanQuery;
import org.apache.lucene.search.BooleanClause.Occur;

public class FieldTermStackTest extends AbstractTestCase {
  
  public void test1Term() throws Exception {
    makeIndex();
    
    FieldQuery fq = new FieldQuery( tq( "a" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 6, stack.termList.size() );
    assertEquals( "a(0,1,0)", stack.pop().toString() );
    assertEquals( "a(2,3,1)", stack.pop().toString() );
    assertEquals( "a(4,5,2)", stack.pop().toString() );
    assertEquals( "a(12,13,6)", stack.pop().toString() );
    assertEquals( "a(28,29,14)", stack.pop().toString() );
    assertEquals( "a(32,33,16)", stack.pop().toString() );
  }
  
  public void test2Terms() throws Exception {
    makeIndex();
    
    BooleanQuery query = new BooleanQuery();
    query.add( tq( "b" ), Occur.SHOULD );
    query.add( tq( "c" ), Occur.SHOULD );
    FieldQuery fq = new FieldQuery( query, true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 8, stack.termList.size() );
    assertEquals( "b(6,7,3)", stack.pop().toString() );
    assertEquals( "b(8,9,4)", stack.pop().toString() );
    assertEquals( "c(10,11,5)", stack.pop().toString() );
    assertEquals( "b(14,15,7)", stack.pop().toString() );
    assertEquals( "b(16,17,8)", stack.pop().toString() );
    assertEquals( "c(18,19,9)", stack.pop().toString() );
    assertEquals( "b(26,27,13)", stack.pop().toString() );
    assertEquals( "b(30,31,15)", stack.pop().toString() );
  }
  
  public void test1Phrase() throws Exception {
    makeIndex();
    
    FieldQuery fq = new FieldQuery( pqF( "c", "d" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 3, stack.termList.size() );
    assertEquals( "c(10,11,5)", stack.pop().toString() );
    assertEquals( "c(18,19,9)", stack.pop().toString() );
    assertEquals( "d(20,21,10)", stack.pop().toString() );
  }
  
  private void makeIndex() throws Exception {
    //           111111111122222
    // 0123456789012345678901234 (offsets)
    // a a a b b c a b b c d e f
    // 0 1 2 3 4 5 6 7 8 9101112 (position)
    String value1 = "a a a b b c a b b c d e f";
    // 222233333
    // 678901234 (offsets)
    // b a b a f
    //1314151617 (position)
    String value2 = "b a b a f";
    
    make1dmfIndex( value1, value2 );
  }
  
  public void test1TermB() throws Exception {
    makeIndexB();
    
    FieldQuery fq = new FieldQuery( tq( "ab" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 2, stack.termList.size() );
    assertEquals( "ab(2,4,2)", stack.pop().toString() );
    assertEquals( "ab(6,8,6)", stack.pop().toString() );
  }
  
  public void test2TermsB() throws Exception {
    makeIndexB();
    
    BooleanQuery query = new BooleanQuery();
    query.add( tq( "bc" ), Occur.SHOULD );
    query.add( tq( "ef" ), Occur.SHOULD );
    FieldQuery fq = new FieldQuery( query, true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 3, stack.termList.size() );
    assertEquals( "bc(4,6,4)", stack.pop().toString() );
    assertEquals( "bc(8,10,8)", stack.pop().toString() );
    assertEquals( "ef(11,13,11)", stack.pop().toString() );
  }
  
  public void test1PhraseB() throws Exception {
    makeIndexB();
    
    FieldQuery fq = new FieldQuery( pqF( "ab", "bb" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 4, stack.termList.size() );
    assertEquals( "ab(2,4,2)", stack.pop().toString() );
    assertEquals( "bb(3,5,3)", stack.pop().toString() );
    assertEquals( "ab(6,8,6)", stack.pop().toString() );
    assertEquals( "bb(7,9,7)", stack.pop().toString() );
  }
  
  private void makeIndexB() throws Exception {
    //                             1 11 11
    // 01 12 23 34 45 56 67 78 89 90 01 12 (offsets)
    // aa|aa|ab|bb|bc|ca|ab|bb|bc|cd|de|ef
    //  0  1  2  3  4  5  6  7  8  9 10 11 (position)
    String value = "aaabbcabbcdef";
    
    make1dmfIndexB( value );
  }
  
  public void test1PhraseShortMV() throws Exception {
    makeIndexShortMV();
    
    FieldQuery fq = new FieldQuery( tq( "d" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 1, stack.termList.size() );
    assertEquals( "d(9,10,3)", stack.pop().toString() );
  }
  
  public void test1PhraseLongMV() throws Exception {
    makeIndexLongMV();
    
    FieldQuery fq = new FieldQuery( pqF( "search", "engines" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 4, stack.termList.size() );
    assertEquals( "search(102,108,14)", stack.pop().toString() );
    assertEquals( "engines(109,116,15)", stack.pop().toString() );
    assertEquals( "search(157,163,24)", stack.pop().toString() );
    assertEquals( "engines(164,171,25)", stack.pop().toString() );
  }

  public void test1PhraseMVB() throws Exception {
    makeIndexLongMVB();
    
    FieldQuery fq = new FieldQuery( pqF( "sp", "pe", "ee", "ed" ), true, true ); // "speed" -(2gram)-> "sp","pe","ee","ed"
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    assertEquals( 4, stack.termList.size() );
    assertEquals( "sp(88,90,61)", stack.pop().toString() );
    assertEquals( "pe(89,91,62)", stack.pop().toString() );
    assertEquals( "ee(90,92,63)", stack.pop().toString() );
    assertEquals( "ed(91,93,64)", stack.pop().toString() );
  }
}

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