Examples of org.hibernate.ScrollableResults.beforeFirst()

org.hibernate.ScrollableResults.beforeFirst()
Go to a location just before first result (this is the initial location)

    assertEquals( true, result.next() );
    assertTrue( result.isFirst() );
    assertTrue( result.scroll( 1 ) );
    assertTrue( result.isLast() );
    assertFalse( result.scroll( 1 ) );
    result.beforeFirst();
    while ( result.next() ) {
      s.delete( result.get()[0] );
    }
    for (Object element : s.createQuery( "from java.lang.Object" ).list()) s.delete( element );
    tx.commit();

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    Query query = parser.parse( "dept:ITech" );
    org.hibernate.search.FullTextQuery hibQuery = s.createFullTextQuery( query, Employee.class );
    hibQuery.setProjection( "id", "lastname", "dept" );


    ScrollableResults projections = hibQuery.scroll();
    projections.beforeFirst();
    Object[] projection = projections.get();
    assertNull( projection );


    projections.next();
    assertTrue( projections.isFirst() );

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    org.hibernate.search.FullTextQuery hibQuery = s.createFullTextQuery( query, Employee.class );
    hibQuery.setProjection( "id", "lastname", "dept" );
    hibQuery.setFetchSize( 6 );


    ScrollableResults results = hibQuery.scroll();
    results.beforeFirst();
    results.next();
    Object[] result = results.get();
    assertEquals( "incorrect entityInfo returned", 1000, result[0] );


    //cleanup

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    org.hibernate.search.FullTextQuery hibQuery = s.createFullTextQuery( query, Employee.class );
    hibQuery.setProjection( "id", "lastname", "dept" );
    hibQuery.setFetchSize( 3 );


    ScrollableResults results = hibQuery.scroll();
    results.beforeFirst();
    results.next();
    Object[] result = results.get();
    assertEquals( "incorrect entityInfo returned", 1000, result[0] );
    results.scroll( 2 );
    result = results.get();

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    hibQuery.setFetchSize( 3 );
    hibQuery.setFirstResult( 1 );
    hibQuery.setMaxResults( 3 );


    ScrollableResults results = hibQuery.scroll();
    results.beforeFirst();
    results.next();
    Object[] result = results.get();
    assertEquals( "incorrect entityInfo returned", 1002, result[0] );


    results.scroll( 2 );

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    hibQuery.setFetchSize( 3 );
    hibQuery.setFirstResult( 1 );
    hibQuery.setMaxResults( 3 );


    ScrollableResults results = hibQuery.scroll();
    results.beforeFirst();
    Object[] result = results.get();
    assertNull( "non-null entity infos returned", result );


    //cleanup
    for (Object element : s.createQuery( "from " + Employee.class.getName() ).list()) s.delete( element );

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    hibQuery.setProjection( "id", "lastname", "dept" );






    ScrollableResults results = hibQuery.scroll();
    results.beforeFirst();
    results.next();
    assertTrue("beforeFirst() pointer incorrect", results.isFirst());


    results.afterLast();
    results.previous();

View Full Code Here


    Query query = parser.parse( "dept:XXX" );
    org.hibernate.search.FullTextQuery hibQuery = s.createFullTextQuery( query, Employee.class );


    ScrollableResults projections = hibQuery.scroll();
    projections.beforeFirst();
    projections.next();
    Object[] projection = projections.get();
    assertNull( projection );


    hibQuery = s.createFullTextQuery( query, Employee.class ).setFirstResult( 10 ).setMaxResults( 20 );

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    assertNull( projection );


    hibQuery = s.createFullTextQuery( query, Employee.class ).setFirstResult( 10 ).setMaxResults( 20 );


    projections = hibQuery.scroll();
    projections.beforeFirst();
    projections.next();
    projection = projections.get();
    assertNull( projection );


    //cleanup

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    query = parser.parse( "summary:Festina Or brand:Seiko" );
    hibQuery = s.createFullTextQuery( query, Clock.class, Book.class );
    result = hibQuery.scroll();
    assertEquals( 0, result.getRowNumber() );
    result.beforeFirst();
    assertEquals( true, result.next() );
    assertTrue( result.isFirst() );
    assertTrue( result.scroll( 1 ) );
    assertTrue( result.isLast() );
    assertFalse( result.scroll( 1 ) );

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