jtp.func
Class Less

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

All Implemented Interfaces:

Reasoner, RelationBasedBCReasoner, RelationBasedReasoner, Serializable

public class Less

extends jtp.func.NumberComparator

Less.java Created: Thu Dec 30 05:24:51 1999

See Also:

Serialized Form

Field Summary

protected int

sign

Fields inherited from class jtp.disp.AbstractRelationBasedBCReasoner

arity, polarity, relation

Fields inherited from interface jtp.disp.RelationBasedReasoner

ANY_ARITY, BOTH, NEGATIVE, POSITIVE

Constructor Summary

Less()

Method Summary

ReasoningStepIterator

process(Object gob) 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

Field Detail

sign

protected int sign

Constructor Detail

Less

public Less()

Method Detail

process

public ReasoningStepIterator process(Object gob)

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:

gob - the goal: either a query or an assertion

Returns:

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