net.sf.tweety.logics.ml

Class AlchemyMlnReasoner

java.lang.Object

net.sf.tweety.commons.Reasoner

net.sf.tweety.logics.ml.AbstractMlnReasoner

net.sf.tweety.logics.ml.AlchemyMlnReasoner

public class AlchemyMlnReasoner
extends AbstractMlnReasoner

This class implements a wrapper for Alchemy in order to reason with MLNs. Note: implementation inspired by AlchemyWrapper of KReator (http://kreator-ide.sourceforge.net)

Author:

Matthias Thimm

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	inferCmd The console command for Alchemy inference.

Constructor Summary

Constructors

Constructor and Description
AlchemyMlnReasoner(BeliefBase beliefBase) Creates a new AlchemyMlnReasoner for the given Markov logic network.
AlchemyMlnReasoner(BeliefBase beliefBase, FolSignature signature) Creates a new AlchemyMlnReasoner for the given Markov logic network.

Method Summary

Modifier and Type	Method and Description
private java.lang.String	alchemyStringForFormula(RelationalFormula formula) Returns the string in Alchemy syntax representing the given formula.
private java.lang.String	alchemyStringForTerm(Term<?> t) Returns the string in Alchemy syntax representing the given term.
double	doQuery(FolFormula query) Performs the actual querying.
void	reset() Resets this reasoner (removes cached files etc.)
void	setAlchemyInferenceCommand(java.lang.String inferCmd) Sets the console command for Alchemy inference (default is 'infer').
private java.io.File	writeAlchemyMlnFile(MarkovLogicNetwork mln, FolSignature signature, FolFormula formula) Writes the given MLN wrt.

Methods inherited from class net.sf.tweety.logics.ml.AbstractMlnReasoner

computeWeight, getSignature, numberOfGroundSatisfactions, query

Methods inherited from class net.sf.tweety.commons.Reasoner

getKnowledgeBase

Methods inherited from class java.lang.Object

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

Field Detail

inferCmd

private java.lang.String inferCmd

The console command for Alchemy inference.

Constructor Detail

AlchemyMlnReasoner

public AlchemyMlnReasoner(BeliefBase beliefBase)

Creates a new AlchemyMlnReasoner for the given Markov logic network.

Parameters:

beliefBase - a Markov logic network.

AlchemyMlnReasoner

public AlchemyMlnReasoner(BeliefBase beliefBase,
                          FolSignature signature)

Creates a new AlchemyMlnReasoner for the given Markov logic network.

Parameters:

beliefBase - a Markov logic network.

signature - another signature (if the probability distribution should be defined on that one (that one should subsume the signature of the Markov logic network)

Method Detail

setAlchemyInferenceCommand

public void setAlchemyInferenceCommand(java.lang.String inferCmd)

Sets the console command for Alchemy inference (default is 'infer').

Parameters:

inferCmd - the console command for Alchemy inference.

doQuery

public double doQuery(FolFormula query)

Description copied from class: AbstractMlnReasoner

Performs the actual querying.

Specified by:

doQuery in class AbstractMlnReasoner

Parameters:

query - a fol formula guaranteed to be ground.

Returns:

the answer of the query.

writeAlchemyMlnFile

private java.io.File writeAlchemyMlnFile(MarkovLogicNetwork mln,
                                         FolSignature signature,
                                         FolFormula formula)
                                  throws java.io.IOException

Writes the given MLN wrt. the given signature to a temporary file in Alchemy syntax.

Parameters:

mln - some MLN.

signature - some fol signature.

queryFormula - the query formula that has to be encoded as well.

Returns:

the file object of the Alchemy MLN file.

Throws:

java.io.IOException - if file writing fails.

alchemyStringForFormula

private java.lang.String alchemyStringForFormula(RelationalFormula formula)

Returns the string in Alchemy syntax representing the given formula.

Parameters:

formula - some FOL formula

Returns:

the string in Alchemy syntax representing the given formula.

alchemyStringForTerm

private java.lang.String alchemyStringForTerm(Term<?> t)

Returns the string in Alchemy syntax representing the given term.

Parameters:

tern - some FOL tern

Returns:

the string in Alchemy syntax representing the given term.

reset

public void reset()

Description copied from class: AbstractMlnReasoner

Resets this reasoner (removes cached files etc.)

Specified by:

reset in class AbstractMlnReasoner