uk.gov.gchq.gaffer.store.optimiser

Class AbstractOperationChainOptimiser

java.lang.Object

uk.gov.gchq.gaffer.store.optimiser.AbstractOperationChainOptimiser

All Implemented Interfaces:

OperationChainOptimiser

Direct Known Subclasses:

CountAllElementsOperationChainOptimiser

public abstract class AbstractOperationChainOptimiser
extends Object
implements OperationChainOptimiser

Abstract base class for the OperationChainOptimiser interface.

Constructor Summary

Constructors

Constructor and Description
AbstractOperationChainOptimiser()

Method Summary

Modifier and Type	Method and Description
<O> OperationChain<O>	optimise(OperationChain<O> operationChain) Optimises the operation chain.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractOperationChainOptimiser

public AbstractOperationChainOptimiser()

Method Detail

optimise

public final <O> OperationChain<O> optimise(OperationChain<O> operationChain)

Description copied from interface: OperationChainOptimiser

Optimises the operation chain. Operations in the chain can be swapped for more efficient operations depending on the store implementation. The operation chain has already been cloned so changes may be made directly to the operation chain parameter if required. This method can be extended to add custom optimisation, but ensure super.optimise is called first. Alternatively, the preferred approach is to override addPreOperations, optimiseCurrentOperation or addPostOperations

Specified by:

optimise in interface OperationChainOptimiser

Type Parameters:

O - the operation output type

Parameters:

operationChain - the operation chain to optimise

Returns:

the optimised operation chain