Examples of cascading.util.NullNotEquivalentComparator

cascading.util.NullNotEquivalentComparator
Class NullNotEquivalentComparator simply returns -1 if the lhs is null, 1 if the rhs is null, or the result of {@code lhs.compareTo(rhs)}.
Use this {@link Comparator} when performing a {@link cascading.pipe.CoGroup} that needs SQL like semantics.

    results.add( new Tuple( "2", "b1", "2", "B3" ) );
    results.add( new Tuple( "4", "d1", "4", "D1" ) );
    results.add( new Tuple( "4", "d2", "4", "D1" ) );
    results.add( new Tuple( "4", "d3", "4", "D1" ) );


    handleJoins( "cogroupinnernull", new InnerJoin(), results, 9, false, new NullNotEquivalentComparator() );
    handleJoins( "cogroupinnernull-resultgroup", new InnerJoin(), results, 9, true, new NullNotEquivalentComparator() );
    }

View Full Code Here

    results.add( new Tuple( "7", "g4", null, null ) );
    results.add( new Tuple( "7", "g5", null, null ) );
    results.add( new Tuple( null, "h1", null, null ) );
    results.add( new Tuple( null, null, null, "H1" ) );


    handleJoins( "cogroupouternull", new OuterJoin(), results, 9, false, new NullNotEquivalentComparator() );
    handleJoins( "cogroupouternull-resultgroup", new OuterJoin(), results, 9, true, new NullNotEquivalentComparator() );
    }

View Full Code Here

    results.add( new Tuple( "7", "g3", null, null ) );
    results.add( new Tuple( "7", "g4", null, null ) );
    results.add( new Tuple( "7", "g5", null, null ) );
    results.add( new Tuple( null, "h1", null, null ) );


    handleJoins( "cogroupinnerouternull", new LeftJoin(), results, 9, false, new NullNotEquivalentComparator() );
    handleJoins( "cogroupinnerouternull-resultgroup", new LeftJoin(), results, 9, true, new NullNotEquivalentComparator() );
    }

View Full Code Here

    results.add( new Tuple( "4", "d3", "4", "D1" ) );
    results.add( new Tuple( null, null, "6", "F1" ) );
    results.add( new Tuple( null, null, "6", "F2" ) );
    results.add( new Tuple( null, null, null, "H1" ) );


    handleJoins( "cogroupouterinnernull", new RightJoin(), results, 9, false, new NullNotEquivalentComparator() );
    handleJoins( "cogroupouterinnernull-resultgroup", new RightJoin(), results, 9, true, new NullNotEquivalentComparator() );
    }

View Full Code Here

    rightPipe = stack.addDebug( this, rightPipe, "rhs" );


    Fields lhsGroup = createTypedFieldsSelectorFor( getCluster(), leftKeys, left.getRowType(), true );
    Fields rhsGroup = createTypedFieldsSelectorFor( getCluster(), rightKeys, right.getRowType(), true );


    NullNotEquivalentComparator comparator = new NullNotEquivalentComparator();
    for( int i = 0; i < lhsGroup.size(); i++ )
      lhsGroup.setComparator( i, comparator );


    Joiner joiner = getJoiner();

View Full Code Here

TOP

Related Classes of cascading.util.NullNotEquivalentComparator

cascading.CoGroupFieldedPipesPlatformTest

cascading.lingual.optiq.CascadingJoinRel

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.