org.deri.iris.rules.ordering
Class SimpleReOrdering

java.lang.Object
  org.deri.iris.rules.ordering.SimpleReOrdering

All Implemented Interfaces:

IRuleReOrderingOptimiser

public class SimpleReOrdering
extends Object
implements IRuleReOrderingOptimiser

Very naive proof of concept, but speeds up a few unit tests by a factor of 10. Attempt to re-order rules by simply looking for the first positive ordinary literal in each rule's body.

Constructor Summary

SimpleReOrdering()

Method Summary

List<IRule>

reOrder(Collection<IRule> rules) Re-order the rules.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleReOrdering

public SimpleReOrdering()

Method Detail

reOrder

public List<IRule> reOrder(Collection<IRule> rules)

Description copied from interface: IRuleReOrderingOptimiser

Re-order the rules. The returned collection will have an implied ordering.

Specified by:

reOrder in interface IRuleReOrderingOptimiser

Parameters:

rules - The rules to re-order.

Returns:

The same rules, but in a more efficient order for evaluation.