Package org.projog.core.predicate.builtin.list

Class RandomMember

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.list.RandomMember

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class RandomMember
extends AbstractSingleResultPredicate

random_member(X,Y) - unifies first argument with term randomly selected from list of second argument.

Succeeds if the first argument can be unified with a randomly selected element of the list represented by the second argument.

Constructor Summary

Constructors

Constructor	Description
RandomMember()

Method Summary

Modifier and Type	Method	Description
protected boolean	evaluate(Term target, Term elements)

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

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, preprocess

Constructor Details

RandomMember

public RandomMember()

Method Details

evaluate

protected boolean evaluate(Term target,
 Term elements)

Overrides:

evaluate in class AbstractSingleResultPredicate