Package uk.gov.gchq.gaffer.store.operation.handler

Class ReduceHandler<T>

java.lang.Object

uk.gov.gchq.gaffer.store.operation.handler.ReduceHandler<T>

Type Parameters:

T - The object type of the input object

All Implemented Interfaces:

OperationHandler<Reduce<T>>, OutputOperationHandler<Reduce<T>,T>

public class ReduceHandler<T>
extends Object
implements OutputOperationHandler<Reduce<T>,T>

A ReduceHandler is a handler for the Reduce Operation

Constructor Summary

Constructors

Constructor	Description
ReduceHandler()

Method Summary

Modifier and Type	Method	Description
T	doOperation(Reduce<T> operation, Context context, Store store)	Handles the Reduce operation.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReduceHandler

public ReduceHandler()

Method Detail

doOperation

public T doOperation(Reduce<T> operation,
                     Context context,
                     Store store)
              throws OperationException

Handles the Reduce operation. Applies the BinaryOperator function contained within the Reduce operation and returns the resulting object.

Specified by:

doOperation in interface OperationHandler<T>

Specified by:

doOperation in interface OutputOperationHandler<Reduce<T>,T>

Parameters:

operation - the Operation to be executed

context - the operation chain context, containing the user who executed the operation

store - the Store the operation should be run on

Returns:

the resulting object from the function

Throws:

OperationException - if execution of the operation fails