Package org.tweetyproject.logics.fol.reasoner

Class Prover9FolReasoner

java.lang.Object

org.tweetyproject.logics.fol.reasoner.FolReasoner

org.tweetyproject.logics.fol.reasoner.Prover9FolReasoner

All Implemented Interfaces:

QualitativeReasoner<FolBeliefSet,FolFormula>, Reasoner<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 inherited from class org.tweetyproject.logics.fol.reasoner.FolReasoner

defaultReasoner

Constructor Summary

Constructors

Constructor	Description
Prover9FolReasoner(String binaryLocation)	Constructs a new instance pointing to a specific Prover9
Prover9FolReasoner(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.
String	getBinaryLocation()
boolean	isInstalled()
Boolean	query(FolBeliefSet kb, FolFormula query)	Queries the given belief base for the given formula.
void	setBinaryLocation(String binaryLocation)	Changes the path of the Prover9 binaries.

Methods inherited from class org.tweetyproject.logics.fol.reasoner.FolReasoner

getDefaultReasoner, setDefaultReasoner

Methods inherited from class java.lang.Object

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

Constructor Details

Prover9FolReasoner

public Prover9FolReasoner(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(String binaryLocation)

Constructs a new instance pointing to a specific Prover9

Parameters:

binaryLocation - of the prover9 executable on the hard drive

Method Details

query

public 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<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.

getBinaryLocation

public String getBinaryLocation()

Returns:

the path of the Prover9 binaries.

setBinaryLocation

public void setBinaryLocation(String binaryLocation)

Changes the path of the Prover9 binaries.

Parameters:

binaryLocation - the new path of the binary

isInstalled

public boolean isInstalled()

Returns:

if the solver is installed