Package org.tweetyproject.lp.asp.reasoner

Class DLVSolver

java.lang.Object

org.tweetyproject.lp.asp.reasoner.ASPSolver

org.tweetyproject.lp.asp.reasoner.DLVSolver

All Implemented Interfaces:

ModelProvider<ASPRule,Program,AnswerSet>, QualitativeReasoner<Program,ASPLiteral>, Reasoner<java.lang.Boolean,Program,ASPLiteral>

public class DLVSolver
extends ASPSolver

Wrapper class for the DLV answer set solver command line utility.

Author:

Thomas Vengels, Tim Janus, Anna Gessler

Constructor Summary

Constructors

Constructor	Description
DLVSolver(java.lang.String pathToDLV)	Constructs a new instance pointing to a specific DLV solver.
DLVSolver(java.lang.String pathToDLV, Shell bash)	Constructs a new instance pointing to a specific DLV solver.

Method Summary

Modifier and Type	Method	Description
AnswerSet	getModel(Program p)	Returns a single (dedicated) model of the given belief base.
AnswerSet	getModel(Program p, int maxInt)	Returns a characterizing model (answer set) of the given belief base using the given upper integer limit.
java.util.List<AnswerSet>	getModels(java.io.File file)	Returns a characterizing model (answer set) of the given belief base.
java.util.List<AnswerSet>	getModels(java.lang.String p)	Returns a characterizing model (answer set) of the given belief base.
java.util.List<AnswerSet>	getModels(Program p)	Returns a characterizing model of the given belief base
java.util.Collection<AnswerSet>	getModels(Program p, int maxInt)	Returns a characterizing model (answer set) of the given belief base using the given upper integer limit.
java.lang.Boolean	query(Program beliefbase, ASPLiteral formula)	Queries the given belief base for the given formula.
java.lang.Boolean	query(Program beliefbase, ASPLiteral formula, InferenceMode inferenceMode)
void	setOptions(java.lang.String options)	Set additional command line options for DLV.
void	setPathToDLV(java.lang.String pathToDLV)	Sets the location of the DLV solver on the hard drive.

Methods inherited from class org.tweetyproject.lp.asp.reasoner.ASPSolver

getIntegerMaximum, getMaxNumOfModels, getOutput, setIntegerMaximum, setMaxNumOfModels

Methods inherited from class java.lang.Object

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

Constructor Detail

DLVSolver

public DLVSolver(java.lang.String pathToDLV)

Constructs a new instance pointing to a specific DLV solver.

Parameters:

pathToDLV - binary location of DLV on the hard drive

DLVSolver

public DLVSolver(java.lang.String pathToDLV,
                 Shell bash)

Constructs a new instance pointing to a specific DLV solver.

Parameters:

pathToDLV - binary location of DLV on the hard drive

bash - shell to run commands

Method Detail

getModels

public java.util.Collection<AnswerSet> getModels(Program p,
                                                 int maxInt)

Returns a characterizing model (answer set) of the given belief base using the given upper integer limit.

Overrides:

getModels in class ASPSolver

Parameters:

p - a program

maxInt - the max number of models to be returned

Returns:

AnswerSet

getModel

public AnswerSet getModel(Program p,
                          int maxInt)

Returns a characterizing model (answer set) of the given belief base using the given upper integer limit.

Overrides:

getModel in class ASPSolver

Parameters:

p - a program

maxInt - the max number of models to be returned

Returns:

AnswerSet

getModels

public java.util.List<AnswerSet> getModels(Program p)

Description copied from interface: ModelProvider

Returns a characterizing model of the given belief base

Specified by:

getModels in interface ModelProvider<ASPRule,Program,AnswerSet>

Specified by:

getModels in class ASPSolver

Parameters:

p - some belief base

Returns:

the (selected) models of the belief base

getModels

public java.util.List<AnswerSet> getModels(java.lang.String p)

Description copied from class: ASPSolver

Returns a characterizing model (answer set) of the given belief base.

Specified by:

getModels in class ASPSolver

Parameters:

p - containing belief base

Returns:

AnswerSet

getModels

public java.util.List<AnswerSet> getModels(java.io.File file)

Description copied from class: ASPSolver

Returns a characterizing model (answer set) of the given belief base.

Specified by:

getModels in class ASPSolver

Parameters:

file - containing belief base

Returns:

AnswerSet

getModel

public AnswerSet getModel(Program p)

Description copied from interface: ModelProvider

Returns a single (dedicated) model of the given belief base. If the implemented method allows for more than one dedicated model, the selection may be non-deterministic.

Parameters:

p - some belief base

Returns:

a selected model of the belief base.

setOptions

public void setOptions(java.lang.String options)

Set additional command line options for DLV.

Parameters:

options - a string of options

setPathToDLV

public void setPathToDLV(java.lang.String pathToDLV)

Sets the location of the DLV solver on the hard drive.

Parameters:

pathToDLV - path to DLV

query

public java.lang.Boolean query(Program beliefbase,
                               ASPLiteral formula)

Description copied from interface: Reasoner

Queries the given belief base for the given formula.

Specified by:

query in interface QualitativeReasoner<Program,ASPLiteral>

Specified by:

query in interface Reasoner<java.lang.Boolean,Program,ASPLiteral>

Specified by:

query in class ASPSolver

Parameters:

beliefbase - a belief base

formula - a formula

Returns:

the answer to the query

query

public java.lang.Boolean query(Program beliefbase,
                               ASPLiteral formula,
                               InferenceMode inferenceMode)