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

    }


  @Override
  public void sink( FlowProcess<? extends Properties> flowProcess, SinkCall<PrintWriter, OutputStream> sinkCall ) throws IOException
    {
    TupleEntry tupleEntry = sinkCall.getOutgoingEntry();


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


    delimitedParser.joinLine( strings, sinkCall.getContext() );


    sinkCall.getContext().println();
    }

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  public void initialize()
    {
    super.initialize();


    Scope outgoingScope = Util.getFirst( outgoingScopes );
    valueEntry = new TupleEntry( outgoingScope.getOutValuesFields(), true );
    }

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      }


    public void aggregate( FlowProcess flowProcess, AggregatorCall<Map<String, Double>> aggregatorCall )
      {
      Map<String, Double> context = aggregatorCall.getContext();
      TupleEntry entry = aggregatorCall.getArguments();


      context.put( COUNT, ( (Double) context.get( COUNT ) ) + 1d );


      context.put( SUM1, ( (Double) context.get( SUM1 ) ) + entry.getTuple().getDouble( 0 ) );
      context.put( SUM2, ( (Double) context.get( SUM2 ) ) + entry.getTuple().getDouble( 1 ) );


      context.put( SUMSQRS1, ( (Double) context.get( SUMSQRS1 ) ) + Math.pow( entry.getTuple().getDouble( 0 ), 2 ) );
      context.put( SUMSQRS2, ( (Double) context.get( SUMSQRS2 ) ) + Math.pow( entry.getTuple().getDouble( 1 ), 2 ) );


      context.put( SUMPROD, ( (Double) context.get( SUMPROD ) ) + ( entry.getTuple().getDouble( 0 ) * entry.getTuple().getDouble( 1 ) ) );
      }

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  public void operate( FlowProcess flowProcess, FunctionCall functionCall )
    {
    Set<Tuple> set = new TreeSet<Tuple>();


    TupleEntry input = functionCall.getArguments();


    for( Fields field : fields )
      set.add( input.selectTuple( field ) );


    int i = 0;
    Tuple inputCopy = new Tuple( input.getTuple() );


    for( Tuple tuple : set )
      inputCopy.put( input.getFields(), fields[ i++ ], tuple );


    functionCall.getOutputCollector().add( inputCopy );
    }

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      aggregatorCall.setContext( new Double[]{0d} );
      }


    public void aggregate( FlowProcess flowProcess, AggregatorCall<Double[]> aggregatorCall )
      {
      TupleEntry entry = aggregatorCall.getArguments();
      aggregatorCall.getContext()[ 0 ] += Math.pow( entry.getDouble( 0 ) - entry.getDouble( 1 ), 2 );
      }

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    {
    }


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

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    {
    int count = 0;


    while( iterator.hasNext() )
      {
      TupleEntry tupleEntry = iterator.next();


      if( size != -1 )
        assertEquals( "wrong number of elements", size, tupleEntry.size() );


      if( regex != null )
        assertTrue( "regex: " + regex + " does not match: " + tupleEntry.getTuple().toString(), regex.matcher( tupleEntry.getTuple().toString() ).matches() );


      count++;
      }


    try

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    assertEquals( "wrong number of lines", length, count );
    }


  public static TupleListCollector invokeFunction( Function function, Tuple arguments, Fields resultFields )
    {
    return invokeFunction( function, new TupleEntry( arguments ), resultFields );
    }

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    return collector;
    }


  public static boolean invokeFilter( Filter filter, Tuple arguments )
    {
    return invokeFilter( filter, new TupleEntry( arguments ) );
    }

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  private static TupleEntry[] makeArgumentsArray( Tuple[] argumentsArray )
    {
    TupleEntry[] entries = new TupleEntry[ argumentsArray.length ];


    for( int i = 0; i < argumentsArray.length; i++ )
      entries[ i ] = new TupleEntry( argumentsArray[ i ] );


    return entries;
    }

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