Package net.sf.tweety.arg.delp.syntax

Class DelpRule

    • Field Detail

      • head

        protected FolFormula head
        The head of the rule (this must be a literal).

      • body

        protected java.util.Set<FolFormula> body
        The body of the rule (these must be a literals).

    • Constructor Detail

      • DelpRule

        DelpRule​(FolFormula head,
         java.util.Collection<? extends FolFormula> body)
        Default constructor; initializes head and body of the rule
        Parameters:
        head - a literal
        body - a set of literals

    • Method Detail

      • getSymbol

        abstract java.lang.String getSymbol()

      • isApplicable

        public boolean isApplicable​(java.util.Collection<? extends FolFormula> literals)
        Checks whether this rule is applicaple in the given context literals,
        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

      • getPremise

        public java.util.Collection<? extends FolFormula> getPremise()
        Description copied from interface: Rule
        Returns the premise of this rule.
        Specified by:
        getPremise in interface Rule<FolFormula,​FolFormula>
        Returns:
        the premise of this rule.

      • isLiteral

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

      • getTerms

        public java.util.Set<Term<?>> getTerms()
        Specified by:
        getTerms in interface LogicStructure
        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.
        Specified by:
        getTerms in interface LogicStructure
        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

      • containsQuantifier

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

      • 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 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).

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

      • 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 interface QuantifiedFormula
        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.
        Specified by:
        isWellBound in interface QuantifiedFormula
        Parameters:
        boundVariables - the variables assumed to be bound.
        Returns:
        "true" if this formula is well-bound, "false" otherwise.

      • equals

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

      • hashCode

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