Examples of org.hibernate.ScrollableResults.scroll()

org.hibernate.ScrollableResults.scroll()
Scroll an arbitrary number of locations @param i a positive (forward) or negative (backward) number of rows @return true if there is a result at the new location

    assertFalse( results.isFirst() );
    assertFalse( results.isLast() );
    assertFalse( results.next() );


    for ( int i=1; i<3; i++ ) {
      assertFalse( results.scroll( i ) );
      assertFalse( results.isFirst() );
      assertFalse( results.isLast() );


      assertFalse( results.scroll( - i ) );
      assertFalse( results.isFirst() );

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    for ( int i=1; i<3; i++ ) {
      assertFalse( results.scroll( i ) );
      assertFalse( results.isFirst() );
      assertFalse( results.isLast() );


      assertFalse( results.scroll( - i ) );
      assertFalse( results.isFirst() );
      assertFalse( results.isLast() );


      assertFalse( results.setRowNumber( i ) );
      assertFalse( results.isFirst() );

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    for ( int i=1; i<3; i++ ) {
      assertTrue( results.setRowNumber( 1 ) );
      assertTrue( results.isFirst() );
      assertTrue( results.isLast() );


      assertFalse( results.scroll( i ) );
      assertFalse( results.isFirst() );
      assertFalse( results.isLast() );


      assertTrue( results.setRowNumber( 1 ) );
      assertTrue( results.isFirst() );

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      assertTrue( results.setRowNumber( 1 ) );
      assertTrue( results.isFirst() );
      assertTrue( results.isLast() );


      assertFalse( results.scroll( - i ) );
      assertFalse( results.isFirst() );
      assertFalse( results.isLast() );


      if ( i != 1 ) {
        assertFalse( results.setRowNumber( i ) );

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    results.first();
    Animal animal = ( Animal ) results.get( 0 );
    assertEquals( "first() did not return expected row", data.root1Id, animal.getId() );


    results.scroll( 1 );
    animal = ( Animal ) results.get( 0 );
    assertEquals( "scroll(1) did not return expected row", data.root2Id, animal.getId() );


    results.scroll( -1 );
    animal = ( Animal ) results.get( 0 );

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    results.scroll( 1 );
    animal = ( Animal ) results.get( 0 );
    assertEquals( "scroll(1) did not return expected row", data.root2Id, animal.getId() );


    results.scroll( -1 );
    animal = ( Animal ) results.get( 0 );
    assertEquals( "scroll(-1) did not return expected row", data.root1Id, animal.getId() );


    results.setRowNumber( 1 );
    animal = ( Animal ) results.get( 0 );

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    s.save( new Bar() );
    Query query = s.createQuery("select f, f.integer from Foo f");
    assertTrue( query.getReturnTypes().length==2 );
    ScrollableResults iter = query.scroll();
    assertTrue( iter.next() );
    assertTrue( iter.scroll(1) );
    FooProxy f2 = (FooProxy) iter.get()[0];
    assertTrue( f2!=null );
    assertTrue( iter.scroll(-1) );
    Object f1 = iter.get(0);
    iter.next();

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    ScrollableResults iter = query.scroll();
    assertTrue( iter.next() );
    assertTrue( iter.scroll(1) );
    FooProxy f2 = (FooProxy) iter.get()[0];
    assertTrue( f2!=null );
    assertTrue( iter.scroll(-1) );
    Object f1 = iter.get(0);
    iter.next();
    assertTrue( f1!=null && iter.get(0)==f2 );
    iter.getInteger(1);

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    Object f1 = iter.get(0);
    iter.next();
    assertTrue( f1!=null && iter.get(0)==f2 );
    iter.getInteger(1);


    assertTrue( !iter.scroll(100) );
    assertTrue( iter.first() );
    assertTrue( iter.scroll(3) );
    Object f4 = iter.get(0);
    assertTrue( f4!=null );
    assertTrue( !iter.next() );

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    assertTrue( f1!=null && iter.get(0)==f2 );
    iter.getInteger(1);


    assertTrue( !iter.scroll(100) );
    assertTrue( iter.first() );
    assertTrue( iter.scroll(3) );
    Object f4 = iter.get(0);
    assertTrue( f4!=null );
    assertTrue( !iter.next() );
    assertTrue( iter.first() );
    assertTrue( iter.get(0)==f1 );

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