Package net.sf.tweety.logics.pl.reasoner

Class AbstractPlReasoner

java.lang.Object

net.sf.tweety.logics.pl.reasoner.AbstractPlReasoner

All Implemented Interfaces:

KernelProvider<PlFormula>, QualitativeReasoner<PlBeliefSet,PlFormula>, Reasoner<java.lang.Boolean,PlBeliefSet,PlFormula>

Direct Known Subclasses:

SatReasoner, SimplePlReasoner

public abstract class AbstractPlReasoner
extends java.lang.Object
implements QualitativeReasoner<PlBeliefSet,PlFormula>, KernelProvider<PlFormula>

Abstract class for propositional logic reasoners.

Author:

Matthias Thimm

Constructor Summary

Constructors

Constructor	Description
AbstractPlReasoner()

Method Summary

Modifier and Type	Method	Description
java.util.Collection<java.util.Collection<PlFormula>>	getKernels(java.util.Collection<PlFormula> formulas, PlFormula formula)	Retrieves the set of kernels for the given formula from the given set of formulas.
boolean	isEquivalent(PlFormula p1, PlFormula p2)	Checks whether the two formulas are equivalent
abstract java.lang.Boolean	query(PlBeliefSet beliefbase, PlFormula formula)	Queries the given belief base for the given formula.
boolean	query(PlFormula formula, PlFormula formula2)	Checks whether the first formula entails the second.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractPlReasoner

public AbstractPlReasoner()

Method Detail

query

public abstract java.lang.Boolean query(PlBeliefSet beliefbase,
                                        PlFormula formula)

Description copied from interface: Reasoner

Queries the given belief base for the given formula.

Specified by:

query in interface QualitativeReasoner<PlBeliefSet,PlFormula>

Specified by:

query in interface Reasoner<java.lang.Boolean,PlBeliefSet,PlFormula>

Parameters:

beliefbase - a belief base

formula - a formula

Returns:

the answer to the query

query

public boolean query(PlFormula formula,
                     PlFormula formula2)

Checks whether the first formula entails the second.

Parameters:

formula - some formula

formula2 - a formula

Returns:

true if the second formula is entailed be the first formula.

isEquivalent

public boolean isEquivalent(PlFormula p1,
                            PlFormula p2)

Checks whether the two formulas are equivalent

Parameters:

p1 - a formula

p2 - a formula

Returns:

true iff the two formulas are equivalent

getKernels

public java.util.Collection<java.util.Collection<PlFormula>> getKernels(java.util.Collection<PlFormula> formulas,
                                                                        PlFormula formula)

Description copied from interface: KernelProvider

Retrieves the set of kernels for the given formula from the given set of formulas.

Specified by:

getKernels in interface KernelProvider<PlFormula>

Parameters:

formulas - a set of formulas.

formula - a formula.

Returns:

the collection of kernels