uk.ac.bbk.dcs.automed.qproc.optimise.optimisers
Class ChooseOptimiser

java.lang.Object
  uk.ac.bbk.dcs.automed.qproc.optimise.optimisers.ChooseOptimiser

public class ChooseOptimiser
extends java.lang.Object

This Class optimises expressions involving the "choose" built-in function.

Author:

Hao Fan, Lucas Zamboulis

Field Summary

protected java.util.logging.Logger

logger

Constructor Summary

ChooseOptimiser()
The three simplification rules.

Method Summary

boolean	apply(Cell c) Applies rules in a bottom-to-top fashion.
int	getNumOfFunctions(Cell c) Get the number of functions in the ASG, if the ASG is a Void Cell, return -1
boolean	optimise(ASG g)
boolean	optimise(Cell c)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected java.util.logging.Logger logger

Constructor Detail

ChooseOptimiser

public ChooseOptimiser()

The three simplification rules.

Method Detail

getNumOfFunctions

public int getNumOfFunctions(Cell c)

Get the number of functions in the ASG, if the ASG is a Void Cell, return -1

Parameters:

c -

Returns:

apply

public boolean apply(Cell c)
              throws java.lang.Exception

Applies rules in a bottom-to-top fashion.

Parameters:

c -

Returns:

Throws:

java.lang.Exception

optimise

public boolean optimise(Cell c)
                 throws QueryOptimisationException

Throws:

QueryOptimisationException

optimise

public boolean optimise(ASG g)