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.

Field Summary

Fields

Modifier and Type	Field	Description
private int	argumentIdx

Constructor Summary

Constructors

Modifier	Constructor	Description
private	PairsElements(int argumentIdx)

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, 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

Field Detail

argumentIdx

private final int argumentIdx

Constructor Detail

PairsElements

private PairsElements(int argumentIdx)

Method Detail

keys

public static PairsElements keys()

values

public static PairsElements values()

evaluate

public boolean evaluate(Term pairs,
                        Term values)

Overrides:

evaluate in class AbstractSingleResultPredicate