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Lucene example source code file (SimpleFragListBuilderTest.java)

This example Lucene source code file (SimpleFragListBuilderTest.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, exception, exception, f, fieldfraglist, fieldfraglist, fieldphraselist, fieldquery, fieldtermstack, fieldtermstack, illegalargumentexception, simplefraglistbuilder, simplefraglistbuilder, string

The Lucene SimpleFragListBuilderTest.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.Query;

public class SimpleFragListBuilderTest extends AbstractTestCase {
  
  public void testNullFieldFragList() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "a", "b c d" ), 100 );
    assertEquals( 0, ffl.getFragInfos().size() );
  }
  
  public void testTooSmallFragSize() throws Exception {
    try{
      SimpleFragListBuilder sflb = new SimpleFragListBuilder();
      sflb.createFieldFragList( fpl( "a", "b c d" ), SimpleFragListBuilder.MIN_FRAG_CHAR_SIZE - 1 );
      fail( "IllegalArgumentException must be thrown" );
    }
    catch ( IllegalArgumentException expected ) {
    }
  }
  
  public void testSmallerFragSizeThanTermQuery() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "abcdefghijklmnopqrs", "abcdefghijklmnopqrs" ), SimpleFragListBuilder.MIN_FRAG_CHAR_SIZE );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(abcdefghijklmnopqrs((0,19)))/1.0(0,19)", ffl.getFragInfos().get( 0 ).toString() );
  }
  
  public void testSmallerFragSizeThanPhraseQuery() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "\"abcdefgh jklmnopqrs\"", "abcdefgh   jklmnopqrs" ), SimpleFragListBuilder.MIN_FRAG_CHAR_SIZE );
    assertEquals( 1, ffl.getFragInfos().size() );
    if (VERBOSE) System.out.println( ffl.getFragInfos().get( 0 ).toString() );
    assertEquals( "subInfos=(abcdefghjklmnopqrs((0,21)))/1.0(0,21)", ffl.getFragInfos().get( 0 ).toString() );
  }
  
  public void test1TermIndex() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "a", "a" ), 100 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1)))/1.0(0,100)", ffl.getFragInfos().get( 0 ).toString() );
  }
  
  public void test2TermsIndex1Frag() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "a", "a a" ), 100 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1))a((2,3)))/2.0(0,100)", ffl.getFragInfos().get( 0 ).toString() );
  
    ffl = sflb.createFieldFragList( fpl( "a", "a b b b b b b b b a" ), 20 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1))a((18,19)))/2.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );

    ffl = sflb.createFieldFragList( fpl( "a", "b b b b a b b b b a" ), 20 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((8,9))a((18,19)))/2.0(2,22)", ffl.getFragInfos().get( 0 ).toString() );
  }
  
  public void test2TermsIndex2Frags() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "a", "a b b b b b b b b b b b b b a" ), 20 );
    assertEquals( 2, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1)))/1.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );
    assertEquals( "subInfos=(a((28,29)))/1.0(22,42)", ffl.getFragInfos().get( 1 ).toString() );

    ffl = sflb.createFieldFragList( fpl( "a", "a b b b b b b b b b b b b a" ), 20 );
    assertEquals( 2, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1)))/1.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );
    assertEquals( "subInfos=(a((26,27)))/1.0(20,40)", ffl.getFragInfos().get( 1 ).toString() );

    ffl = sflb.createFieldFragList( fpl( "a", "a b b b b b b b b b a" ), 20 );
    assertEquals( 2, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1)))/1.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );
    assertEquals( "subInfos=(a((20,21)))/1.0(20,40)", ffl.getFragInfos().get( 1 ).toString() );
  }
  
  public void test2TermsQuery() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "a b", "c d e" ), 20 );
    assertEquals( 0, ffl.getFragInfos().size() );

    ffl = sflb.createFieldFragList( fpl( "a b", "d b c" ), 20 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(b((2,3)))/1.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );

    ffl = sflb.createFieldFragList( fpl( "a b", "a b c" ), 20 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(a((0,1))b((2,3)))/2.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );
  }
  
  public void testPhraseQuery() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "\"a b\"", "c d e" ), 20 );
    assertEquals( 0, ffl.getFragInfos().size() );

    ffl = sflb.createFieldFragList( fpl( "\"a b\"", "a c b" ), 20 );
    assertEquals( 0, ffl.getFragInfos().size() );

    ffl = sflb.createFieldFragList( fpl( "\"a b\"", "a b c" ), 20 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(ab((0,3)))/1.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );
  }
  
  public void testPhraseQuerySlop() throws Exception {
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl( "\"a b\"~1", "a c b" ), 20 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(ab((0,1)(4,5)))/1.0(0,20)", ffl.getFragInfos().get( 0 ).toString() );
  }

  private FieldPhraseList fpl( String queryValue, String indexValue ) throws Exception {
    make1d1fIndex( indexValue );
    Query query = paW.parse( queryValue );
    FieldQuery fq = new FieldQuery( query, true, true );
    FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
    return new FieldPhraseList( stack, fq );
  }
  
  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 );
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl, 100 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(d((9,10)))/1.0(3,103)", ffl.getFragInfos().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 );
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl, 100 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(searchengines((102,116))searchengines((157,171)))/2.0(96,196)", ffl.getFragInfos().get( 0 ).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 );
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList( fpl, 100 );
    assertEquals( 1, ffl.getFragInfos().size() );
    assertEquals( "subInfos=(sppeeeed((88,93)))/1.0(82,182)", ffl.getFragInfos().get( 0 ).toString() );
  }
}

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