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

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

public class ComprehensionDistributor
extends java.lang.Object

This optimiser is used to decompose a comprehension whose generators contain append expressions, such as [x|x<-(E1++E2)]. For above example, the result is "[x|x<-E1]++[x|x<-E2]".

Author:

Hao Fan, Lucas Zamboulis

Field Summary

protected java.util.logging.Logger

logger

Constructor Summary

ComprehensionDistributor(boolean disjointIDs)

Method Summary

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

ComprehensionDistributor

public ComprehensionDistributor(boolean disjointIDs)

Method Detail

optimise

public boolean optimise(Cell c)
                 throws QueryOptimisationException

Throws:

QueryOptimisationException

optimise

public boolean optimise(ASG g)