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

Class OperationHandlerUtil

java.lang.Object

uk.gov.gchq.gaffer.store.operation.handler.util.OperationHandlerUtil

public final class OperationHandlerUtil
extends Object

Utilities for Operation Handlers.

Method Summary

Modifier and Type	Method	Description
static Object	getResultsOrNull(Operation op, Context context, Store store)	Executes and operation on the store and returns the results or null.
static void	updateOperationInput(Operation operation, Object input)	Updates the input of an operation if the operation is an OperationChain or an Input.

Methods inherited from class java.lang.Object

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

Method Detail

updateOperationInput

public static void updateOperationInput(Operation operation,
                                        Object input)

Updates the input of an operation if the operation is an OperationChain or an Input.

If the operation is an operation chain then the input will be set on the first operation if it is an Input operation with a null input.

If the operation is an Input operation then the input will be set if the current input is null.

Parameters:

operation - the operation to update

input - the new input to set on the operation.

getResultsOrNull

public static Object getResultsOrNull(Operation op,
                                      Context context,
                                      Store store)
                               throws OperationException

Executes and operation on the store and returns the results or null.

Parameters:

op - the operation to execute

context - the user context

store - the store to execute the operation on

Returns:

the results or null

Throws:

OperationException - if the store fails to execute the operation.