jtp.func
Class EvaluableFunctionReasoner

java.lang.Object
  |
  +--jtp.disp.AbstractRelationBasedReasoner
        |
        +--jtp.disp.AbstractRelationBasedBCReasoner
              |
              +--jtp.func.EvaluableFunctionReasoner

All Implemented Interfaces:

Reasoner, RelationBasedBCReasoner, RelationBasedReasoner, Serializable

Direct Known Subclasses:

TimePointFunctionReasoner

public abstract class EvaluableFunctionReasoner

extends AbstractRelationBasedBCReasoner

See Also:

Serialized Form

Field Summary

Fields inherited from class jtp.disp.AbstractRelationBasedBCReasoner

arity, polarity, relation

Fields inherited from interface jtp.disp.RelationBasedReasoner

ANY_ARITY, BOTH, NEGATIVE, POSITIVE

Constructor Summary

EvaluableFunctionReasoner(Symbol opSymbol, int arity)

Method Summary

abstract boolean	evaluate(Object[] args, Object result, List varStack, boolean isNegated)
ReasoningStepIterator	process(Object o) This method attempts to find proof for the goal.

Methods inherited from class jtp.disp.AbstractRelationBasedBCReasoner

acceptable, getArity, getPolarity, getRelation, literalAcceptable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface jtp.disp.RelationBasedReasoner

getArity, getPolarity, getRelation

Constructor Detail

EvaluableFunctionReasoner

public EvaluableFunctionReasoner(Symbol opSymbol,
                                 int arity)

Method Detail

evaluate

public abstract boolean evaluate(Object[] args,
                                 Object result,
                                 List varStack,
                                 boolean isNegated)
                          throws ReasoningException

ReasoningException

process

public ReasoningStepIterator process(Object o)
                              throws ReasoningException

Description copied from interface: Reasoner

This method attempts to find proof for the goal. It returns an enumeration of reasoning steps that correspond to alternative proofs for the goal. Consequently, the items of the enumeration can actually belong to different models of the goal sentence, and have incompatible variable assignments.

Example. A reasoner that performs unification of the goal with facts in a knowledge base can return the following enumeration for the goal (parent joe ?x):

1. A reasoning step proving (parent joe fred) with variable assignment ?x=fred,
2. A reasoning step proving (parent joe mary) with variable assignment ?x=mary.

Parameters:

o - the goal: either a query or an assertion

Returns:

the iterator of reasoning steps - proofs for the query, or consequences of the assertion.

ReasoningException