Lucene example source code file (SimpleFragListBuilderTest.java)

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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() );
  }
}