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

Class EFOLReasoner

java.lang.Object

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

net.sf.tweety.logics.fol.reasoner.EFOLReasoner

All Implemented Interfaces:

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

public class EFOLReasoner
extends FolReasoner

Invokes E (http://eprover.org), an automated theorem prover for first-order logic, and returns its results.

Author:

Bastian Wolf, Nils Geilen, Matthias Thimm

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.String	additionalArguments	Additional arguments for the call to the EProver binary (Default value is "--auto-schedule" which seems to be working best in general)
private Shell	bash	Shell to run EProver
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
EFOLReasoner(java.lang.String binaryLocation)	Constructs a new instance pointing to a specific EProver.
EFOLReasoner(java.lang.String binaryLocation, Shell bash)	Constructs a new instance pointing to a specific EProver.

Method Summary

Modifier and Type	Method	Description
boolean	equivalent(FolBeliefSet kb, FolFormula a, FolFormula b)	This method determines whether two formulas are equivalent wrt.
java.lang.String	getAdditionalArguments()	Returns the additional arguments given to the call of the EProver binary (Default value is "--auto-schedule").
java.lang.String	getBinaryLocation()	Returns the path of the EProver binary.
java.lang.Boolean	query(FolBeliefSet kb, FolFormula query)	Queries the given belief base for the given formula.
void	setAdditionalArguments(java.lang.String s)	Sets the additional arguments given to the call of the EProver binary (Default value is "--auto-schedule").
void	setBinaryLocation(java.lang.String binaryLocation)	Changes the path of the EProver binary.

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.

additionalArguments

private java.lang.String additionalArguments

Additional arguments for the call to the EProver binary (Default value is "--auto-schedule" which seems to be working best in general)

bash

private Shell bash

Shell to run EProver

Constructor Detail

EFOLReasoner

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

Constructs a new instance pointing to a specific EProver.

Parameters:

binaryLocation - location of the EProver executable on the hard drive

bash - shell to run commands

EFOLReasoner

public EFOLReasoner(java.lang.String binaryLocation)

Constructs a new instance pointing to a specific EProver.

Parameters:

binaryLocation - location of the Eprover executable on the hard drive

Method Detail

setAdditionalArguments

public void setAdditionalArguments(java.lang.String s)

Sets the additional arguments given to the call of the EProver binary (Default value is "--auto-schedule").

Parameters:

s - some string

getAdditionalArguments

public java.lang.String getAdditionalArguments()

Returns the additional arguments given to the call of the EProver binary (Default value is "--auto-schedule").

Returns:

the additional arguments

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.

getBinaryLocation

public java.lang.String getBinaryLocation()

Returns the path of the EProver binary.

Returns:

the path of the EProver binary

setBinaryLocation

public void setBinaryLocation(java.lang.String binaryLocation)

Changes the path of the EProver binary.

Parameters:

binaryLocation - the new path of the EProver binary