org.projog.core.predicate.builtin.db

Class InsertRecord

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.db.InsertRecord

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class InsertRecord
extends AbstractSingleResultPredicate

recorda(X,Y,Z) / recordz(X,Y,Z) - associates a term with a key.

recorda(X,Y,Z) associates Y with X. The unique reference for this association will be unified with Z. Y is added to the start of the list of terms already associated with X.

recordz(X,Y,Z) associates Y with X. The unique reference for this association will be unified with Z. Y is added to the end of the list of terms already associated with X.

Method Summary

Modifier and Type	Method and Description
protected boolean	evaluate(Term key, Term value)
protected boolean	evaluate(Term key, Term value, Term reference)
void	init() This method is called by AbstractSingleResultPredicate.setKnowledgeBase(KnowledgeBase).
static InsertRecord	recordA()
static InsertRecord	recordZ()

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

evaluate, evaluate, evaluate, evaluate, getArithmeticOperators, getFileHandles, getKnowledgeBase, getOperands, getPredicate, getPredicates, getProjogListeners, getSpyPoints, getTermFormatter, 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

recordA

public static InsertRecord recordA()

recordZ

public static InsertRecord recordZ()

init

public void init()

Description copied from class: AbstractSingleResultPredicate

This method is called by AbstractSingleResultPredicate.setKnowledgeBase(KnowledgeBase).

Can be overridden by subclasses to perform initialisation before any calls to AbstractSingleResultPredicate.evaluate(Term...) are made. As AbstractSingleResultPredicate.setKnowledgeBase(KnowledgeBase) will have already been called before this method is invoked, overridden versions will be able to access the KnowledgeBase using AbstractSingleResultPredicate.getKnowledgeBase().

Overrides:

init in class AbstractSingleResultPredicate

evaluate

protected boolean evaluate(Term key,
                           Term value)

Overrides:

evaluate in class AbstractSingleResultPredicate

evaluate

protected boolean evaluate(Term key,
                           Term value,
                           Term reference)

Overrides:

evaluate in class AbstractSingleResultPredicate