Package net.sf.tweety.arg.delp.syntax
Class DelpRule
- java.lang.Object
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- net.sf.tweety.logics.commons.syntax.RelationalFormula
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- net.sf.tweety.arg.delp.syntax.DelpRule
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- All Implemented Interfaces:
Formula
,Rule<FolFormula,FolFormula>
,ClassicalFormula
,ComplexLogicalFormula
,Conjunctable
,Disjunctable
,Invertable
,LogicStructure
,ProbabilityAware
,QuantifiedFormula
,SimpleLogicalFormula
- Direct Known Subclasses:
DefeasibleRule
,DelpFact
,StrictRule
public abstract class DelpRule extends RelationalFormula implements Rule<FolFormula,FolFormula>
This method is the superclass for both a strict rule and a defeasible rule in defeasible logic programming and captures their common attributes and methods.- Author:
- Matthias Thimm, Tim Janus
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Method Summary
Modifier and Type Method Description void
addPremise(FolFormula premise)
void
addPremises(java.util.Collection<? extends FolFormula> premises)
Conjunction
combineWithAnd(Conjunctable f)
Returns a conjunction of this and the given formula.Disjunction
combineWithOr(Disjunctable f)
RelationalFormula
complement()
boolean
containsQuantifier()
Checks whether this formula contains any quantification.boolean
equals(java.lang.Object o)
java.util.Set<FolAtom>
getAtoms()
Processes the set of all atoms which appear in this formulaFolFormula
getConclusion()
Returns the conclusion of this rule.java.util.Set<Functor>
getFunctors()
java.util.Set<Predicate>
getPredicates()
Processes the set of all predicates which appear in this formulajava.util.Collection<? extends FolFormula>
getPremise()
Returns the premise of this rule.java.util.Set<Variable>
getQuantifierVariables()
FolSignature
getSignature()
Returns the signature of the language of this formula.java.util.Set<Term<?>>
getTerms()
<C extends Term<?>>
java.util.Set<C>getTerms(java.lang.Class<C> cls)
Processes the set containing all terms of type C.java.util.Set<Variable>
getUnboundVariables()
Probability
getUniformProbability()
int
hashCode()
boolean
isApplicable(java.util.Collection<? extends FolFormula> literals)
Checks whether this rule is applicaple in the given contextliterals
,boolean
isClosed()
Checks whether this formula is closed, i.e.boolean
isClosed(java.util.Set<Variable> boundVariables)
Checks whether this formula is closed, i.e.boolean
isConstraint()
boolean
isFact()
boolean
isGround()
Checks whether there appear any variables in this ruleboolean
isLiteral()
boolean
isWellBound()
Checks whether this formula is well-bound, i.e.boolean
isWellBound(java.util.Set<Variable> boundVariables)
Checks whether this formula is well-bound, i.e.void
setConclusion(FolFormula conclusion)
abstract RelationalFormula
substitute(Term<?> v, Term<?> t)
Substitutes all occurrences of term "v" in this formula by term "t" and returns the new formula.java.lang.String
toString()
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Methods inherited from class net.sf.tweety.logics.commons.syntax.RelationalFormula
allGroundInstances, allSubstitutions, clone, containsTermsOfType, exchange, getFormula, getPredicateCls, getSatisfactionRatio, isWellFormed, substitute
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Method Detail
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isApplicable
public boolean isApplicable(java.util.Collection<? extends FolFormula> literals)
Checks whether this rule is applicaple in the given contextliterals
,- Parameters:
literals
- a set of literals- Returns:
true
iff this rule is applicaple, i.e., if the body of the rule is a subset of the given set of literals
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isGround
public boolean isGround()
Checks whether there appear any variables in this rule- Specified by:
isGround
in interfaceComplexLogicalFormula
- Overrides:
isGround
in classRelationalFormula
- Returns:
true
iff there appears no variable in this rule
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getPremise
public java.util.Collection<? extends FolFormula> getPremise()
Description copied from interface:Rule
Returns the premise of this rule.- Specified by:
getPremise
in interfaceRule<FolFormula,FolFormula>
- Returns:
- the premise of this rule.
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getConclusion
public FolFormula getConclusion()
Description copied from interface:Rule
Returns the conclusion of this rule.- Specified by:
getConclusion
in interfaceRule<FolFormula,FolFormula>
- Returns:
- the conclusion of this rule.
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combineWithAnd
public Conjunction combineWithAnd(Conjunctable f)
Description copied from interface:Conjunctable
Returns a conjunction of this and the given formula.- Specified by:
combineWithAnd
in interfaceConjunctable
- Specified by:
combineWithAnd
in classRelationalFormula
- Parameters:
f
- a formula to be combined with AND and this.- Returns:
- a conjunction of this and the given formula.
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combineWithOr
public Disjunction combineWithOr(Disjunctable f)
- Specified by:
combineWithOr
in interfaceDisjunctable
- Specified by:
combineWithOr
in classRelationalFormula
- Parameters:
f
- a formula to be combined with OR and this.- Returns:
- a disjunction of this and the given formula.
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complement
public RelationalFormula complement()
- Specified by:
complement
in interfaceInvertable
- Specified by:
complement
in classRelationalFormula
- Returns:
- the complement of this formula.
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getPredicates
public java.util.Set<Predicate> getPredicates()
Description copied from interface:SimpleLogicalFormula
Processes the set of all predicates which appear in this formula- Specified by:
getPredicates
in interfaceSimpleLogicalFormula
- Returns:
- all predicates that appear in this formula
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getAtoms
public java.util.Set<FolAtom> getAtoms()
Description copied from interface:SimpleLogicalFormula
Processes the set of all atoms which appear in this formula- Specified by:
getAtoms
in interfaceSimpleLogicalFormula
- Specified by:
getAtoms
in classRelationalFormula
- Returns:
- all atoms that appear in this formula.
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isLiteral
public boolean isLiteral()
- Specified by:
isLiteral
in interfaceSimpleLogicalFormula
- Returns:
- true if the formula represents a literal in the language or false otherwise
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getTerms
public java.util.Set<Term<?>> getTerms()
- Specified by:
getTerms
in interfaceLogicStructure
- Returns:
- a set containing all terms of this logical structure
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getTerms
public <C extends Term<?>> java.util.Set<C> getTerms(java.lang.Class<C> cls)
Description copied from interface:LogicStructure
Processes the set containing all terms of type C. This method uses the equals method of the given Class and therefore does not add terms which are sub classes of type C to the set.- Specified by:
getTerms
in interfaceLogicStructure
- Type Parameters:
C
- the type of terms- Parameters:
cls
- The Class structure containing type information about the searched term- Returns:
- A set containing all terms of type C of this logical structure
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getQuantifierVariables
public java.util.Set<Variable> getQuantifierVariables()
- Specified by:
getQuantifierVariables
in interfaceQuantifiedFormula
- Returns:
- a set containing all quantified variables
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isFact
public boolean isFact()
- Specified by:
isFact
in interfaceRule<FolFormula,FolFormula>
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isConstraint
public boolean isConstraint()
- Specified by:
isConstraint
in interfaceRule<FolFormula,FolFormula>
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setConclusion
public void setConclusion(FolFormula conclusion)
- Specified by:
setConclusion
in interfaceRule<FolFormula,FolFormula>
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addPremise
public void addPremise(FolFormula premise)
- Specified by:
addPremise
in interfaceRule<FolFormula,FolFormula>
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addPremises
public void addPremises(java.util.Collection<? extends FolFormula> premises)
- Specified by:
addPremises
in interfaceRule<FolFormula,FolFormula>
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containsQuantifier
public boolean containsQuantifier()
Description copied from interface:QuantifiedFormula
Checks whether this formula contains any quantification.- Specified by:
containsQuantifier
in interfaceQuantifiedFormula
- Returns:
- "true" if this formula contains a quantification.
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substitute
public abstract RelationalFormula substitute(Term<?> v, Term<?> t) throws java.lang.IllegalArgumentException
Description copied from class:RelationalFormula
Substitutes all occurrences of term "v" in this formula by term "t" and returns the new formula. NOTE: if "v" is a variable and bound to a quantifier then "v" is not substituted in that quantifiers inner formula.- Specified by:
substitute
in interfaceComplexLogicalFormula
- Specified by:
substitute
in classRelationalFormula
- Parameters:
v
- the term to be substituted.t
- the term to substitute.- Returns:
- a formula where every occurrence of "v" is replaced by "t".
- Throws:
java.lang.IllegalArgumentException
- if "v" and "t" are of different sorts (NOTE: this exception is only thrown when "v" actually appears in this formula).
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getUnboundVariables
public java.util.Set<Variable> getUnboundVariables()
- Specified by:
getUnboundVariables
in interfaceQuantifiedFormula
- Returns:
- a set of of unbound variables
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isClosed
public boolean isClosed()
Description copied from interface:QuantifiedFormula
Checks whether this formula is closed, i.e. whether every variables occurring in the formula is bound by a quantifier.- Specified by:
isClosed
in interfaceQuantifiedFormula
- Returns:
- "true" if this formula is closed, "false" otherwise.
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isClosed
public boolean isClosed(java.util.Set<Variable> boundVariables)
Description copied from interface:QuantifiedFormula
Checks whether this formula is closed, i.e. whether every variables occurring in the formula is bound by a quantifier. Every variable in "boundVariables" is already assumed to be bound.- Specified by:
isClosed
in interfaceQuantifiedFormula
- Parameters:
boundVariables
- the variables assumed to be bound.- Returns:
- "true" if this formula is closed wrt. "boundVariables", "false" otherwise.
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isWellBound
public boolean isWellBound()
Description copied from interface:QuantifiedFormula
Checks whether this formula is well-bound, i.e. whether no variable bound by a quantifier is again bound by another quantifier within the first quantifier's range.- Specified by:
isWellBound
in interfaceQuantifiedFormula
- Returns:
- "true" if this formula is well-bound, "false" otherwise.
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isWellBound
public boolean isWellBound(java.util.Set<Variable> boundVariables)
Description copied from interface:QuantifiedFormula
Checks whether this formula is well-bound, i.e. whether no variable bound by a quantifier is again bound by another quantifier within the first quantifier range. Every variable in "boundVariables" is assumed to be bound already.- Specified by:
isWellBound
in interfaceQuantifiedFormula
- Parameters:
boundVariables
- the variables assumed to be bound.- Returns:
- "true" if this formula is well-bound, "false" otherwise.
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getFunctors
public java.util.Set<Functor> getFunctors()
- Specified by:
getFunctors
in classRelationalFormula
- Returns:
- all functors that appear in this formula.
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getUniformProbability
public Probability getUniformProbability()
- Specified by:
getUniformProbability
in interfaceProbabilityAware
- Specified by:
getUniformProbability
in classRelationalFormula
- Returns:
- this formula's probability in the uniform distribution.
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toString
public java.lang.String toString()
- Specified by:
toString
in classRelationalFormula
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equals
public boolean equals(java.lang.Object o)
- Specified by:
equals
in interfaceSimpleLogicalFormula
- Overrides:
equals
in classjava.lang.Object
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hashCode
public int hashCode()
- Specified by:
hashCode
in interfaceSimpleLogicalFormula
- Overrides:
hashCode
in classjava.lang.Object
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getSignature
public FolSignature getSignature()
Description copied from interface:Formula
Returns the signature of the language of this formula.- Specified by:
getSignature
in interfaceFormula
- Specified by:
getSignature
in interfaceRule<FolFormula,FolFormula>
- Returns:
- the signature of the language of this formula.
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