cascading.operation

Interface Function<Context>

All Superinterfaces:

DeclaresResults, Operation<Context>

All Known Implementing Classes:

AggregateBy.CompositeFunction, Base10HashFunction, Base64HashFunction, Base64URLHashFunction, BaseHashFunction, DateFormatter, DateParser, FieldFormatter, FieldJoiner, Identity, Insert, NoOp, RegexGenerator, RegexParser, RegexReplace, RegexSplitGenerator, RegexSplitter, SetValue, UnGroup

public interface Function<Context>
extends Operation<Context>

Interface Function marks a given Operation as a function, as opposed to being a Filter.

A Function is responsible for taking Tuple arguments and returning one or more result Tuples.

To implement a Function, (optionally) sub-class BaseOperation and have the new sub-class implement this interface.

Field Summary

Fields inherited from interface cascading.operation.Operation

ANY

Method Summary

Modifier and Type	Method and Description
void	operate(FlowProcess flowProcess, FunctionCall<Context> functionCall) Method operate provides the implementation of this Function.

Methods inherited from interface cascading.operation.Operation

cleanup, flush, getFieldDeclaration, getNumArgs, isSafe, prepare

Method Detail

operate

void operate(FlowProcess flowProcess,
             FunctionCall<Context> functionCall)

Method operate provides the implementation of this Function.

Parameters:

flowProcess - of type FlowProcess

functionCall - of type FunctionCall