How to use

evaluate

method

in

cascading.operation.expression.ScriptTupleFunction

@Override
public void operate( FlowProcess flowProcess, FunctionCall<Context> functionCall )
 {
 functionCall.getOutputCollector().add( (Tuple) evaluate( functionCall.getContext(), functionCall.getArguments() ) );
 }
}

@Override
public void operate( FlowProcess flowProcess, FunctionCall<Context> functionCall )
 {
 functionCall.getOutputCollector().add( (Tuple) evaluate( functionCall.getContext(), functionCall.getArguments() ) );
 }
}

private Object evaluate( String expression, Class returnType, TupleEntry tupleEntry )
 {
 ScriptTupleFunction function = new ScriptTupleFunction( new Fields( "result", returnType ), expression );
 ConcreteCall<ExpressionOperation.Context> call = new ConcreteCall<ExpressionOperation.Context>( tupleEntry.getFields(), function.getFieldDeclaration() );
 function.prepare( FlowProcess.NULL, call );
 return function.evaluate( call.getContext(), tupleEntry );
 }

private Object evaluate( String expression, String[] names, Class[] types, TupleEntry tupleEntry )
 {
 ScriptTupleFunction function = new ScriptTupleFunction( new Fields( "result" ), expression, names, types );
 ConcreteCall<ExpressionOperation.Context> call = new ConcreteCall<ExpressionOperation.Context>( tupleEntry.getFields(), function.getFieldDeclaration() );
 function.prepare( FlowProcess.NULL, call );
 return function.evaluate( call.getContext(), tupleEntry );
 }

private Object evaluate( String expression, Class returnType, TupleEntry tupleEntry )
 {
 ScriptTupleFunction function = new ScriptTupleFunction( new Fields( "result", returnType ), expression );
 ConcreteCall<ExpressionOperation.Context> call = new ConcreteCall<ExpressionOperation.Context>( tupleEntry.getFields(), function.getFieldDeclaration() );
 function.prepare( FlowProcess.NULL, call );
 return function.evaluate( call.getContext(), tupleEntry );
 }

private Object evaluate( String expression, String[] names, Class[] types, TupleEntry tupleEntry )
 {
 ScriptTupleFunction function = new ScriptTupleFunction( new Fields( "result" ), expression, names, types );
 ConcreteCall<ExpressionOperation.Context> call = new ConcreteCall<ExpressionOperation.Context>( tupleEntry.getFields(), function.getFieldDeclaration() );
 function.prepare( FlowProcess.NULL, call );
 return function.evaluate( call.getContext(), tupleEntry );
 }