cascading.operation

Interface FunctionCall<C>

All Superinterfaces:

OperationCall<C>

All Known Implementing Classes:

ConcreteCall

public interface FunctionCall<C>
extends OperationCall<C>

Interface FunctionCall provides access to the current Function invocation arguments.

Method Summary

Modifier and Type	Method and Description
TupleEntry	getArguments() Returns TupleEntry of argument values.
Fields	getDeclaredFields() Return the resolved Fields declared by the current Operation.
TupleEntryCollector	getOutputCollector() Returns the TupleEntryCollector used to emit result values.

Methods inherited from interface cascading.operation.OperationCall

getArgumentFields, getContext, setContext

Method Detail

getArguments

TupleEntry getArguments()

Returns TupleEntry of argument values.

Note that the returned TupleEntry should not be cached (stored in a Collection), nor should the underlying Tuple instance. Where possible Cascading will re-use both TupleEntry and Tuple instances.

To get a safe copy that can be cached, use TupleEntry.getTupleCopy().

Returns:

TupleEntry

getDeclaredFields

Fields getDeclaredFields()

Return the resolved Fields declared by the current Operation.

Specified by:

getDeclaredFields in interface OperationCall<C>

Returns:

Fields

getOutputCollector

TupleEntryCollector getOutputCollector()

Returns the TupleEntryCollector used to emit result values.

Returns:

TupleCollector