org.projog.core.predicate.builtin.debug

Class AlterSpyPoint

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.debug.AlterSpyPoint

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class AlterSpyPoint
extends AbstractSingleResultPredicate

spy(X) / nospy(X) - add or remove a spy point for a predicate.

spy(X) - add a spy point for a predicate. By adding a spy point for the predicate name instantiated to X the programmer will be informed how it is used in the resolution of a goal.

nospy(X) - removes a spy point for a predicate. By removing a spy point for the predicate name instantiated to X the programmer will no longer be informed how it is used in the resolution of a goal.

Method Summary

Modifier and Type	Method and Description
protected boolean	evaluate(Term t)
static AlterSpyPoint	noSpy()
static AlterSpyPoint	spy()

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

evaluate, evaluate, evaluate, evaluate, evaluate, getArithmeticOperators, getFileHandles, getKnowledgeBase, getOperands, 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

Methods inherited from interface org.projog.core.predicate.PredicateFactory

isAlwaysCutOnBacktrack

Method Detail

spy

public static AlterSpyPoint spy()

noSpy

public static AlterSpyPoint noSpy()

evaluate

protected boolean evaluate(Term t)

Overrides:

evaluate in class AbstractSingleResultPredicate