Examples of it.unimi.dsi.mg4j.search.DocumentIterator.skipTo()

Class it.unimi.dsi.mg4j.search.DocumentIterator

Examples of it.unimi.dsi.mg4j.search.DocumentIterator.skipTo()

it.unimi.dsi.mg4j.search.DocumentIterator.skipTo()
Skips all documents smaller than n.
Define the current document k associated with this document iterator as follows:
- -1, if {@link #nextDocument()} and this method have never been called;
- {@link Integer#MAX_VALUE}, if a call to this method returned {@link Integer#MAX_VALUE};
- the last value returned by a call to {@link #nextDocument()} or this method, otherwise.
If k is larger than or equal to n, then this method does nothing and returns k. Otherwise, a call to this method is equivalent to
```
 while( ( k = nextDocument() ) < n && k != -1 ); return k == -1 ? Integer.MAX_VALUE : k; 
```
Thus, when a result k ≠ {@link Integer#MAX_VALUE}is returned, the state of this iterator will be exactly the same as after a call to {@link #nextDocument()} that returned k. In particular, the first document larger than or equal to n (when returned by this method) will not be returned by the next call to {@link #nextDocument()}. @param n a document pointer. @return a document pointer larger than or equal to n if available, {@link Integer#MAX_VALUE}otherwise.

        ObjectArrays.quickSort( sorted, DocumentScoreInfo.DOCUMENT_COMPARATOR );


        documentIterator = query[ i ].accept( builderVisitor.prepare() );
      
        for( DocumentScoreInfo<Reference2ObjectMap<Index,SelectedInterval[]>> dsi: sorted ) {
          documentIterator.skipTo( dsi.document );
          dsi.info = intervalSelector.select( documentIterator, new Reference2ObjectArrayMap<Index,SelectedInterval[]>( numIndices ) );
        }
      
        documentIterator.dispose();
      }

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  public void testSkipBug() throws QueryParserException, QueryBuilderVisitorException, IOException {
    Query query = simpleParser.parse( "a + b + c" );
    DocumentIteratorBuilderVisitor documentIteratorBuilderVisitor = new DocumentIteratorBuilderVisitor( null, index, Integer.MAX_VALUE );
    DocumentIterator documentIterator = query.accept( documentIteratorBuilderVisitor );
    assertEquals( 2, documentIterator.skipTo( 2 ) );
    documentIterator.dispose();
  }
  


  public void test() throws IOException {

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    i0.reset();
    i1.reset();
    i2.reset();


    consecutiveDocumentIterator = ConsecutiveDocumentIterator.getInstance( i0, i1, i2 );
    assertEquals( 2, consecutiveDocumentIterator.skipTo( 2 ) );
    assertEquals( 2, consecutiveDocumentIterator.document() );
    assertEquals( Interval.valueOf( 2 ), consecutiveDocumentIterator.intervalIterator().nextInterval() );
    assertFalse( consecutiveDocumentIterator.intervalIterator().hasNext() );
    assertEquals( 3, consecutiveDocumentIterator.nextDocument() );
    assertFalse( consecutiveDocumentIterator.hasNext() );

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    i0.reset();
    i1.reset();
    i2.reset();


    consecutiveDocumentIterator = ConsecutiveDocumentIterator.getInstance( i0, i1, i2 );
    assertEquals( 2, consecutiveDocumentIterator.skipTo( 1 ) );
    assertEquals( 2, consecutiveDocumentIterator.document() );
    assertEquals( Interval.valueOf( 0, 2 ), consecutiveDocumentIterator.intervalIterator().nextInterval() );
    assertFalse( consecutiveDocumentIterator.intervalIterator().hasNext() );
    assertEquals( 3, consecutiveDocumentIterator.nextDocument() );
    assertEquals( 3, consecutiveDocumentIterator.document() );

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          }
        };




        for (int document = 0; document < index.numberOfDocuments; document++) {
            currDoc[ 0 ] = iterator.skipTo(document);


            if (document == currDoc[ 0 ]) {
               iterator.accept(visitor); // see method visit below.
            }
        }

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  public void testSkipBug() throws QueryParserException, QueryBuilderVisitorException, IOException {
    Query query = simpleParser.parse( "a | b | c" );
    DocumentIteratorBuilderVisitor documentIteratorBuilderVisitor = new DocumentIteratorBuilderVisitor( null, index, Integer.MAX_VALUE );
    DocumentIterator documentIterator = query.accept( documentIteratorBuilderVisitor );
    assertEquals( 2, documentIterator.skipTo( 2 ) );
    documentIterator.dispose();
  }
  


  public void testOr() throws IOException {

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        { { 1, 3 } },
        { {} },
        { {} },
        } );
    DocumentIterator differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );
    assertEquals( 2, differenceIterator.skipTo( 1 ) );
    assertEquals( 2, differenceIterator.skipTo( 1 ) ); // To increase coverage
    assertEquals( Integer.MAX_VALUE, differenceIterator.skipTo( 4 ) );


    minuendIterator.reset();
    subtrahendIterator.reset();

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        { {} },
        { {} },
        } );
    DocumentIterator differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );
    assertEquals( 2, differenceIterator.skipTo( 1 ) );
    assertEquals( 2, differenceIterator.skipTo( 1 ) ); // To increase coverage
    assertEquals( Integer.MAX_VALUE, differenceIterator.skipTo( 4 ) );


    minuendIterator.reset();
    subtrahendIterator.reset();
    differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );

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        { {} },
        } );
    DocumentIterator differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );
    assertEquals( 2, differenceIterator.skipTo( 1 ) );
    assertEquals( 2, differenceIterator.skipTo( 1 ) ); // To increase coverage
    assertEquals( Integer.MAX_VALUE, differenceIterator.skipTo( 4 ) );


    minuendIterator.reset();
    subtrahendIterator.reset();
    differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );
    assertEquals( 2, differenceIterator.skipTo( 2 ) );

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    assertEquals( Integer.MAX_VALUE, differenceIterator.skipTo( 4 ) );


    minuendIterator.reset();
    subtrahendIterator.reset();
    differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );
    assertEquals( 2, differenceIterator.skipTo( 2 ) );
    
    
    minuendIterator.reset();
    subtrahendIterator.reset();
    differenceIterator = DifferenceDocumentIterator.getInstance( minuendIterator, subtrahendIterator );

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