org.projog.core.predicate.builtin.compare

Class StrictEquality

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.compare.StrictEquality

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class StrictEquality
extends AbstractSingleResultPredicate

X==Y - a strict equality test.

If X can be matched with Y the goal succeeds else the goal fails. A X==Y goal will only consider an uninstantiated variable to be equal to another uninstantiated variable that is already sharing with it.

Constructor Summary

Constructors

Constructor and Description
StrictEquality()

Method Summary

Modifier and Type	Method and Description
protected boolean	evaluate(Term arg1, Term arg2)

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

Constructor Detail

StrictEquality

public StrictEquality()

Method Detail

evaluate

protected boolean evaluate(Term arg1,
                           Term arg2)

Overrides:

evaluate in class AbstractSingleResultPredicate