Package net.sf.tweety.logics.fol.reasoner

Class Prover9FolReasoner

java.lang.Object

net.sf.tweety.logics.fol.reasoner.FolReasoner

net.sf.tweety.logics.fol.reasoner.Prover9FolReasoner

All Implemented Interfaces:

QualitativeReasoner<FolBeliefSet,FolFormula>, Reasoner<java.lang.Boolean,FolBeliefSet,FolFormula>

public class Prover9FolReasoner
extends FolReasoner

Invokes Prover9 ( https://www.cs.unm.edu/~mccune/mace4/), an automated theorem prover for first-order logic, and returns its results.

Author:

Nils Geilen, Matthias Thimm

Field Summary

Fields

Modifier and Type	Field	Description
private Shell	bash	Shell to run Prover9
private java.lang.String	binaryLocation	String representation of the EProver binary path.

Fields inherited from class net.sf.tweety.logics.fol.reasoner.FolReasoner

defaultReasoner

Constructor Summary

Constructors

Constructor	Description
Prover9FolReasoner(java.lang.String binaryLocation)	Constructs a new instance pointing to a specific Prover9
Prover9FolReasoner(java.lang.String binaryLocation, Shell bash)	Constructs a new instance pointing to a specific Prover9.

Method Summary

Modifier and Type	Method	Description
boolean	equivalent(FolBeliefSet kb, FolFormula a, FolFormula b)	This method determines whether two formulas are equivalent wrt.
private boolean	eval(java.io.File file)	Invokes Prover9.
java.lang.String	getBinaryLocation()	Returns the path of the Prover9 binaries.
java.lang.Boolean	query(FolBeliefSet kb, FolFormula query)	Queries the given belief base for the given formula.
void	setBinaryLocation(java.lang.String binaryLocation)	Changes the path of the Prover9 binaries.

Methods inherited from class net.sf.tweety.logics.fol.reasoner.FolReasoner

getDefaultReasoner, setDefaultReasoner

Methods inherited from class java.lang.Object

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

Field Detail

binaryLocation

private java.lang.String binaryLocation

String representation of the EProver binary path. Temporary files are stored in this directory.

bash

private Shell bash

Shell to run Prover9

Constructor Detail

Prover9FolReasoner

public Prover9FolReasoner(java.lang.String binaryLocation,
                          Shell bash)

Constructs a new instance pointing to a specific Prover9.

Parameters:

binaryLocation - of the prover9 executable on the hard drive

bash - shell to run commands

Prover9FolReasoner

public Prover9FolReasoner(java.lang.String binaryLocation)

Constructs a new instance pointing to a specific Prover9

Parameters:

binaryLocation - of the prover9 executable on the hard drive

Method Detail

query

public java.lang.Boolean query(FolBeliefSet kb,
                               FolFormula query)

Description copied from interface: Reasoner

Queries the given belief base for the given formula.

Specified by:

query in interface QualitativeReasoner<FolBeliefSet,FolFormula>

Specified by:

query in interface Reasoner<java.lang.Boolean,FolBeliefSet,FolFormula>

Specified by:

query in class FolReasoner

Parameters:

kb - a belief base

query - a formula

Returns:

the answer to the query

equivalent

public boolean equivalent(FolBeliefSet kb,
                          FolFormula a,
                          FolFormula b)

Description copied from class: FolReasoner

This method determines whether two formulas are equivalent wrt. to the given knowledge base.

Specified by:

equivalent in class FolReasoner

Parameters:

kb - the knowledge base

a - the first formula.

b - the second formula.

Returns:

the answer to the query.

eval

private boolean eval(java.io.File file)
              throws java.lang.Exception

Invokes Prover9.

Parameters:

file - input file for Prover9

Returns:

query result

Throws:

java.lang.Exception - if something goes wrong

getBinaryLocation

public java.lang.String getBinaryLocation()

Returns the path of the Prover9 binaries.

Returns:

binary location of Prover9

setBinaryLocation

public void setBinaryLocation(java.lang.String binaryLocation)

Changes the path of the Prover9 binaries.

Parameters:

binaryLocation - the new path of the binary