org.projog.core.predicate.builtin.flow

Class Cut

java.lang.Object

org.projog.core.predicate.AbstractPredicateFactory

org.projog.core.predicate.builtin.flow.Cut

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class Cut
extends AbstractPredicateFactory

! - the "cut".

The "cut", represented as a !, is a special mechanism which affects how prolog backtracks.

Constructor Summary

Constructors

Constructor and Description
Cut()

Method Summary

Modifier and Type	Method and Description
protected Predicate	getPredicate()
boolean	isAlwaysCutOnBacktrack() Will attempting to re-evaluate this implementation always result in a cut?

Methods inherited from class org.projog.core.predicate.AbstractPredicateFactory

getArithmeticOperators, getFileHandles, getKnowledgeBase, getOperands, getPredicate, getPredicate, getPredicate, getPredicate, getPredicate, getPredicates, getProjogListeners, getSpyPoints, getTermFormatter, init, isRetryable, setKnowledgeBase

Methods inherited from class java.lang.Object

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

Constructor Detail

Cut

public Cut()

Method Detail

getPredicate

protected Predicate getPredicate()

Overrides:

getPredicate in class AbstractPredicateFactory

isAlwaysCutOnBacktrack

public boolean isAlwaysCutOnBacktrack()

Description copied from interface: PredicateFactory

Will attempting to re-evaluate this implementation always result in a cut?

Returns:

true if a cut will always be encountered when attempting to re-evaluate, false otherwise