Package net.sf.tweety.logics.rdl.syntax

Class DefaultRule

    • Constructor Detail

      • DefaultRule

        public DefaultRule()
        an empty Default Rule

      • DefaultRule

        public DefaultRule​(FolFormula pre,
                   FolFormula jus,
                   FolFormula conc)
            throws java.lang.IllegalArgumentException
        Creates a new DefaultRule
        Parameters:
        pre - the prerequsite
        jus - the justification
        conc - the conclusion
        Throws:
        java.lang.IllegalArgumentException - if there is some issue with the arguments
        ParserException - when a parameter is missing

      • DefaultRule

        public DefaultRule​(FolFormula pre,
                   java.util.Collection<FolFormula> jus,
                   FolFormula conc)
            throws java.lang.IllegalArgumentException
        Creates a new DefaultRule
        Parameters:
        pre - the prerequsite
        jus - the justifications
        conc - the conclusion
        Throws:
        java.lang.IllegalArgumentException - if there is some issue with the arguments

    • Method Detail

      • isNormal

        public boolean isNormal​(DefaultTheory dt)
        Tests, whether the default is normal normal ^= a:c/c
        Parameters:
        dt - a default theory
        Returns:
        true iff the theory is normal

      • getPrerequisite

        public FolFormula getPrerequisite()
        Returns:
        the default's prerequisite

      • getJustification

        public java.util.Collection<FolFormula> getJustification()
        Returns:
        the default's justification

      • getConclusion

        public FolFormula getConclusion()
        Returns:
        the default's conclusion

      • getPredicates

        public java.util.Set<? extends Predicate> getPredicates()
        Description copied from interface: SimpleLogicalFormula
        Processes the set of all predicates which appear in this formula
        Returns:
        all predicates that appear in this formula

      • isLiteral

        public boolean isLiteral()
        Returns:
        true if the formula represents a literal in the language or false otherwise

      • getQuantifierVariables

        public java.util.Set<Variable> getQuantifierVariables()
        Returns:
        a set containing all quantified variables

      • getUnboundVariables

        public java.util.Set<Variable> getUnboundVariables()
        Returns:
        a set of of unbound variables

      • containsQuantifier

        public boolean containsQuantifier()
        Description copied from interface: QuantifiedFormula
        Checks whether this formula contains any quantification.
        Returns:
        "true" if this formula contains a quantification.

      • 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.
        Returns:
        "true" if this formula is well-bound, "false" otherwise.

      • 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.
        Parameters:
        boundVariables - the variables assumed to be bound.
        Returns:
        "true" if this formula is well-bound, "false" otherwise.

      • 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.
        Returns:
        "true" if this formula is closed, "false" otherwise.

      • 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.
        Parameters:
        boundVariables - the variables assumed to be bound.
        Returns:
        "true" if this formula is closed wrt. "boundVariables", "false" otherwise.

      • getTerms

        public java.util.Set<Term<?>> getTerms()
        Returns:
        a set containing all terms of this logical structure

      • 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.
        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

      • substitute

        public 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 interface ComplexLogicalFormula
        Specified by:
        substitute in class RelationalFormula
        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).

      • getSignature

        public FolSignature getSignature()
        Description copied from interface: Formula
        Returns the signature of the language of this formula.
        Returns:
        the signature of the language of this formula.

      • hashCode

        public int hashCode()
        Specified by:
        hashCode in interface SimpleLogicalFormula
        Overrides:
        hashCode in class java.lang.Object

      • equals

        public boolean equals​(java.lang.Object o)
        Specified by:
        equals in interface SimpleLogicalFormula
        Overrides:
        equals in class java.lang.Object