Package org.tweetyproject.action.description.syntax

Class StaticLaw

java.lang.Object

org.tweetyproject.action.description.syntax.CLaw

org.tweetyproject.action.description.syntax.StaticLaw

All Implemented Interfaces:

CausalLaw, Formula

public class StaticLaw
extends CLaw

This class represents a static rule in C, which has the following form: "caused H if G" where H is a propositional formula over the set of fluents and G is a propositional formula over the set of fluents and the set of actions

Author:

Sebastian Homann

Constructor Summary

Constructors

Constructor	Description
StaticLaw()	Creates an empty static law.
StaticLaw(FolFormula headFormula)	Creates an empty static law of the form "caused headFormula if True"
StaticLaw(FolFormula headFormula, Set<GroundingRequirement> requirements)	Creates an empty static law of the form "caused headFormula if True requires requirements"
StaticLaw(FolFormula headFormula, FolFormula ifFormula)	Creates an empty static law of the form "caused headFormula if ifFormula"
StaticLaw(FolFormula headFormula, FolFormula ifFormula, Set<GroundingRequirement> requirements)	Creates an empty static law of the form "caused headFormula if ifFormula" requires requirements

Method Summary

Modifier and Type	Method	Description
Set<CLaw>	getAllGrounded()	Retrieves the set of all grounded instances of this causal law.
Set<FolAtom>	getAtoms()	Retrieves the set of propositions (atoms) contained in all formulas within this law.
Set<FolFormula>	getFormulas()	Returns the set of formulas contained in this causal law, e.g.
Signature	getSignature()	Returns the signature of the language of this formula.
boolean	isDefinite()	Returns true iff this law is definite.
Set<CLaw>	toDefinite()	Returns an equivalent definite causal law.
String	toString()

Methods inherited from class org.tweetyproject.action.description.syntax.CLaw

addGroundingRequirement, getHeadFormula, getIfFormula, isGround

Methods inherited from class java.lang.Object

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

Constructor Details

StaticLaw

public StaticLaw()

Creates an empty static law.

StaticLaw

public StaticLaw(FolFormula headFormula)

Creates an empty static law of the form "caused headFormula if True"

Parameters:

headFormula - some FOL formula

StaticLaw

public StaticLaw(FolFormula headFormula,
 Set<GroundingRequirement> requirements)

Creates an empty static law of the form "caused headFormula if True requires requirements"

Parameters:

headFormula - some FOL formula

requirements - a set of requirements

StaticLaw

public StaticLaw(FolFormula headFormula,
 FolFormula ifFormula)

Creates an empty static law of the form "caused headFormula if ifFormula"

Parameters:

headFormula - some FOL formula

ifFormula - some FOL formula

StaticLaw

public StaticLaw(FolFormula headFormula,
 FolFormula ifFormula,
 Set<GroundingRequirement> requirements)

Creates an empty static law of the form "caused headFormula if ifFormula" requires requirements

Parameters:

headFormula - some FOL formula

ifFormula - some FOL formula

requirements - a set of requirements

Method Details

isDefinite

public boolean isDefinite()

Description copied from class: CLaw

Returns true iff this law is definite. A causal law is definite if it's head is a literal or a contradiction and all formulas are conjunctions of literals.

Specified by:

isDefinite in class CLaw

Returns:

true, if this law is definite, false otherwise.

toString

public String toString()

Overrides:

toString in class Object

toDefinite

public Set<CLaw> toDefinite()
                     throws IllegalStateException

Description copied from class: CLaw

Returns an equivalent definite causal law. A causal law is definite if it's head is a literal or a contradiction and all formulas are conjunctions of literals.

Specified by:

toDefinite in class CLaw

Returns:

the equivalent definite causal law if one exists.

Throws:

IllegalStateException - when there is no equivalent definite causal law.

getSignature

public Signature getSignature()

Description copied from interface: Formula

Returns the signature of the language of this formula.

Specified by:

getSignature in interface Formula

Specified by:

getSignature in class CLaw

Returns:

the signature of the language of this formula.

getAtoms

public Set<FolAtom> getAtoms()

Description copied from class: CLaw

Retrieves the set of propositions (atoms) contained in all formulas within this law.

Specified by:

getAtoms in class CLaw

Returns:

a `Set` of `FolAtom` objects representing all the propositions in the formulas that constitute this law.

getAllGrounded

public Set<CLaw> getAllGrounded()

Description copied from class: CLaw

Retrieves the set of all grounded instances of this causal law.

Specified by:

getAllGrounded in class CLaw

Returns:

a `Set` of `CLaw` objects representing all grounded instances of this causal law.

getFormulas

public Set<FolFormula> getFormulas()

Description copied from class: CLaw

Returns the set of formulas contained in this causal law, e.g. in a static law, this contains the head formula and the if formula.

Specified by:

getFormulas in class CLaw

Returns:

the set of formulas contained in this causal law.