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

Class ToListHandler<T>

java.lang.Object

uk.gov.gchq.gaffer.store.operation.handler.output.ToListHandler<T>

Type Parameters:

T - the type of object contained in the input iterable

All Implemented Interfaces:

OperationHandler<ToList<T>>, OutputOperationHandler<ToList<T>,List<? extends T>>

public class ToListHandler<T>
extends Object
implements OutputOperationHandler<ToList<T>,List<? extends T>>

The ToListHandler handles ToList operations by collecting the items in the input Iterable into a List. Use of this operation will cause all of the items present in the input iterable to be brought into memory, so this operation is not suitable for situations where the size of the input iterable is very large.

Constructor Summary

Constructors

Constructor	Description
ToListHandler()

Method Summary

Modifier and Type	Method	Description
List<T>	doOperation(ToList<T> operation, Context context, Store store)	Execute the given Output operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

ToListHandler

public ToListHandler()

Method Detail

doOperation

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

Description copied from interface: OutputOperationHandler

Execute the given Output operation.

Specified by:

doOperation in interface OperationHandler<T>

Specified by:

doOperation in interface OutputOperationHandler<ToList<T>,List<? extends T>>

Parameters:

operation - the Output 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 output for the operation.

Throws:

OperationException - thrown if the operation fails