Examples of cascading.tuple.TupleEntry

cascading.tuple.TupleEntry
Class TupleEntry allows a {@link Tuple} instance and its declaring {@link Fields} instance to be used as a single object.
Once a TupleEntry is created, its Fields cannot be changed, but the Tuple instance it holds can be replaced or modified. The managed Tuple should not have elements added or removed, as this will break the relationship with the associated Fields instance.
If type information is provided on the Fields instance, all setters on this class will use that information to coerce the given object to the expected type.
For example, if position is is of type {@code long}, then {@code entry.setString(0, "9" )} will coerce the "9" to along {@code 9}. Thus, {@code entry.getObject(0) == 9l}.
No coercion is performed with the {@link #getObject(Comparable)} and {@link #getObject(int)} methods.
To set a value without coercion, see the {@link #setRaw(Comparable,Object)} and {@link #setRaw(int,Object)}methods. @see Fields @see Tuple

    boolean result = sourceCall.getInput().next( key, value );


    if( !result )
      return false;


    TupleEntry entry = sourceCall.getIncomingEntry();


    if( entry.hasTypes() )
      entry.setCanonicalTuple( value );
    else
      entry.setTuple( value );


    return true;
    }

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    return sourceCall.getInput().next( context[ 0 ], context[ 1 ] );
    }


  protected void sourceHandleInput( SourceCall<Object[], RecordReader> sourceCall )
    {
    TupleEntry result = sourceCall.getIncomingEntry();


    int index = 0;
    Object[] context = sourceCall.getContext();


    // coerce into canonical forms
    if( getSourceFields().size() == 2 )
      result.setLong( index++, ( (LongWritable) context[ 0 ] ).get() );


    result.setString( index, makeEncodedString( context ) );
    }

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    }


  @Override
  public void sink( FlowProcess<? extends Configuration> flowProcess, SinkCall<Object[], OutputCollector> sinkCall ) throws IOException
    {
    TupleEntry tupleEntry = sinkCall.getOutgoingEntry();


    Text text = (Text) sinkCall.getContext()[ 0 ];
    StringBuilder line = (StringBuilder) sinkCall.getContext()[ 1 ];
    Charset charset = (Charset) sinkCall.getContext()[ 2 ];


    Iterable<String> strings = tupleEntry.asIterableOf( String.class );


    line = (StringBuilder) delimitedParser.joinLine( strings, line );


    text.set( line.toString().getBytes( charset ) );

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    String line = sourceCall.getContext().readLine();


    if( line == null )
      return false;


    TupleEntry incomingEntry = sourceCall.getIncomingEntry();


    if( getSourceFields().size() == 1 )
      {
      incomingEntry.setObject( 0, line );
      }
    else
      {
      incomingEntry.setInteger( 0, lineNumber );
      incomingEntry.setString( 1, line );
      }


    return true;
    }

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    operationCall = new ConcreteCall();
    }


  private TupleEntry getEntry( Tuple tuple )
    {
    return new TupleEntry( Fields.size( tuple.size() ), tuple );
    }

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    ExpressionFilter f2 = new ExpressionFilter( "( 100f < b )", new String[]{"b"}, new Class<?>[]{Float.TYPE} );
    Or logic = new Or( new Fields( "a" ), f1, new Fields( "b" ), f2 );


    boolean[] results = invokeFilter( logic,
      new TupleEntry[]{
        new TupleEntry( inputFields, new Tuple( "1", "10" ) ),
        new TupleEntry( inputFields, new Tuple( "2", "20" ) )
      } );


    assertFalse( results[ 0 ] );
    assertFalse( results[ 1 ] );
    }

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    ExpressionFilter f2 = new ExpressionFilter( "( 100f < b )", new String[]{"b"}, new Class<?>[]{Float.TYPE} );
    Xor logic = new Xor( new Fields( "a" ), f1, new Fields( "b" ), f2 );


    boolean[] results = invokeFilter( logic,
      new TupleEntry[]{
        new TupleEntry( inputFields, new Tuple( "1", "10" ) ),
        new TupleEntry( inputFields, new Tuple( "2", "20" ) )
      } );


    assertFalse( results[ 0 ] );
    assertFalse( results[ 1 ] );
    }

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    ExpressionFilter f2 = new ExpressionFilter( "( 100f < b )", new String[]{"b"}, new Class<?>[]{Float.TYPE} );
    And logic = new And( new Fields( "a" ), f1, new Fields( "b" ), f2 );


    boolean[] results = invokeFilter( logic,
      new TupleEntry[]{
        new TupleEntry( inputFields, new Tuple( "1", "10" ) ),
        new TupleEntry( inputFields, new Tuple( "2", "20" ) )
      } );


    assertFalse( results[ 0 ] );
    assertFalse( results[ 1 ] );
    }

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    operationCall = new ConcreteCall();
    }


  private TupleEntry getEntry( Tuple tuple )
    {
    return new TupleEntry( Fields.size( tuple.size() ), tuple );
    }

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    }


  public void operate( FlowProcess flowProcess, BufferCall<Integer> bufferCall )
    {
    bufferCall.setContext( bufferCall.getContext() + 1 );
    TupleEntry group = bufferCall.getGroup();


//    if( !group.getFields().equals( groupFields ) )
//      throw new RuntimeException( "group fields do not match: " + group.getFields() + " != " + groupFields );


    if( group.size() != groupFields.size() )
      throw new RuntimeException( "group tuple size not fields size" );


    if( group.size() == 0 )
      throw new RuntimeException( "group tuple size is zero" );


    boolean allAreNull = true;
    for( Object o : group.getTuple() )
      {
      if( o != null )
        allAreNull = false;
      }

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