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Lucene example source code file (FieldPhraseListTest.java)

This example Lucene source code file (FieldPhraseListTest.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, f, f, fieldphraselist, fieldphraselist, fieldphraselisttest, fieldquery, fieldquery, fieldtermstack, fieldtermstack

The Lucene FieldPhraseListTest.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 FieldPhraseListTest extends AbstractTestCase {
  
  public void test1TermIndex() throws Exception {
    make1d1fIndex( "a" );

    FieldQuery fq = new FieldQuery( tq( "a" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "a(1.0)((0,1))", fpl.phraseList.get( 0 ).toString() );

    fq = new FieldQuery( tq( "b" ), true, true );
    stack = new FieldTermStack( reader, 0, F, fq );
    fpl = new FieldPhraseList( stack, fq );
    assertEquals( 0, fpl.phraseList.size() );
  }
  
  public void test2TermsIndex() throws Exception {
    make1d1fIndex( "a a" );

    FieldQuery fq = new FieldQuery( tq( "a" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 2, fpl.phraseList.size() );
    assertEquals( "a(1.0)((0,1))", fpl.phraseList.get( 0 ).toString() );
    assertEquals( "a(1.0)((2,3))", fpl.phraseList.get( 1 ).toString() );
  }
  
  public void test1PhraseIndex() throws Exception {
    make1d1fIndex( "a b" );

    FieldQuery fq = new FieldQuery( pqF( "a", "b" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "ab(1.0)((0,3))", fpl.phraseList.get( 0 ).toString() );

    fq = new FieldQuery( tq( "b" ), true, true );
    stack = new FieldTermStack( reader, 0, F, fq );
    fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "b(1.0)((2,3))", fpl.phraseList.get( 0 ).toString() );
  }
  
  public void test1PhraseIndexB() throws Exception {
    // 01 12 23 34 45 56 67 78 (offsets)
    // bb|bb|ba|ac|cb|ba|ab|bc
    //  0  1  2  3  4  5  6  7 (positions)
    make1d1fIndexB( "bbbacbabc" );

    FieldQuery fq = new FieldQuery( pqF( "ba", "ac" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "baac(1.0)((2,5))", fpl.phraseList.get( 0 ).toString() );
  }
  
  public void test2ConcatTermsIndexB() throws Exception {
    // 01 12 23 (offsets)
    // ab|ba|ab
    //  0  1  2 (positions)
    make1d1fIndexB( "abab" );

    FieldQuery fq = new FieldQuery( tq( "ab" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 2, fpl.phraseList.size() );
    assertEquals( "ab(1.0)((0,2))", fpl.phraseList.get( 0 ).toString() );
    assertEquals( "ab(1.0)((2,4))", fpl.phraseList.get( 1 ).toString() );
  }
  
  public void test2Terms1PhraseIndex() throws Exception {
    make1d1fIndex( "c a a b" );

    // phraseHighlight = true
    FieldQuery fq = new FieldQuery( pqF( "a", "b" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "ab(1.0)((4,7))", fpl.phraseList.get( 0 ).toString() );

    // phraseHighlight = false
    fq = new FieldQuery( pqF( "a", "b" ), false, true );
    stack = new FieldTermStack( reader, 0, F, fq );
    fpl = new FieldPhraseList( stack, fq );
    assertEquals( 2, fpl.phraseList.size() );
    assertEquals( "a(1.0)((2,3))", fpl.phraseList.get( 0 ).toString() );
    assertEquals( "ab(1.0)((4,7))", fpl.phraseList.get( 1 ).toString() );
  }
  
  public void testPhraseSlop() throws Exception {
    make1d1fIndex( "c a a b c" );

    FieldQuery fq = new FieldQuery( pqF( 2F, 1, "a", "c" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "ac(2.0)((4,5)(8,9))", fpl.phraseList.get( 0 ).toString() );
    assertEquals( 4, fpl.phraseList.get( 0 ).getStartOffset() );
    assertEquals( 9, fpl.phraseList.get( 0 ).getEndOffset() );
  }
  
  public void test2PhrasesOverlap() throws Exception {
    make1d1fIndex( "d a b c d" );

    BooleanQuery query = new BooleanQuery();
    query.add( pqF( "a", "b" ), Occur.SHOULD );
    query.add( pqF( "b", "c" ), Occur.SHOULD );
    FieldQuery fq = new FieldQuery( query, true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "abc(1.0)((2,7))", fpl.phraseList.get( 0 ).toString() );
  }
  
  public void test3TermsPhrase() throws Exception {
    make1d1fIndex( "d a b a b c d" );

    FieldQuery fq = new FieldQuery( pqF( "a", "b", "c" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "abc(1.0)((6,11))", fpl.phraseList.get( 0 ).toString() );
  }
  
  public void testSearchLongestPhrase() throws Exception {
    make1d1fIndex( "d a b d c a b c" );

    BooleanQuery query = new BooleanQuery();
    query.add( pqF( "a", "b" ), Occur.SHOULD );
    query.add( pqF( "a", "b", "c" ), Occur.SHOULD );
    FieldQuery fq = new FieldQuery( query, true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 2, fpl.phraseList.size() );
    assertEquals( "ab(1.0)((2,5))", fpl.phraseList.get( 0 ).toString() );
    assertEquals( "abc(1.0)((10,15))", fpl.phraseList.get( 1 ).toString() );
  }
  
  public void test1PhraseShortMV() throws Exception {
    makeIndexShortMV();

    FieldQuery fq = new FieldQuery( tq( "d" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "d(1.0)((9,10))", fpl.phraseList.get( 0 ).toString() );
  }
  
  public void test1PhraseLongMV() throws Exception {
    makeIndexLongMV();

    FieldQuery fq = new FieldQuery( pqF( "search", "engines" ), true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 2, fpl.phraseList.size() );
    assertEquals( "searchengines(1.0)((102,116))", fpl.phraseList.get( 0 ).toString() );
    assertEquals( "searchengines(1.0)((157,171))", fpl.phraseList.get( 1 ).toString() );
  }

  public void test1PhraseLongMVB() 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 );
    FieldPhraseList fpl = new FieldPhraseList( stack, fq );
    assertEquals( 1, fpl.phraseList.size() );
    assertEquals( "sppeeeed(1.0)((88,93))", fpl.phraseList.get( 0 ).toString() );
  }
}

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