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

Class PairsElements

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.list.PairsElements

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class PairsElements
extends AbstractSingleResultPredicate

pairs_keys(Pairs,Keys) / pairs_values(Pairs,Values) - get keys or values from list of Key-Value pairs.

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(Term pairs, Term values)
static PairsElements	keys()
static PairsElements	values()

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

Method Details

keys

public static PairsElements keys()

values

public static PairsElements values()

evaluate

public boolean evaluate(Term pairs,
 Term values)

Overrides:

evaluate in class AbstractSingleResultPredicate