Package net.sf.tweety.arg.aba.syntax

Class AbaElement<T extends Formula>

    • Constructor Summary

      Constructors 
      Constructor Description
      AbaElement()  

    • Method Summary

      Modifier and Type Method Description
      java.util.Set<? extends AbaElement<T>> allGroundInstances​(java.util.Set<Constant> constants)
      Computes all ground instances of all inner fol formulas wrt.
      java.util.Set<java.util.Map<Variable,​Term<?>>> allSubstitutions​(java.util.Collection<? extends Term<?>> terms)
      Computes all possible substitutions, i.e.
      abstract AbaElement<T> clone()
      Creates a deep copy of this formula
      <C extends Term<?>>
      boolean      		 containsTermsOfType​(java.lang.Class<C> cls)
      Checks if this logical structure contains at least one term of type C.
      AbaElement<T> exchange​(Term<?> v, Term<?> t)
      Substitutes all occurrences of term "v" in this formula by term "t" and at the same time replaces all occurrences of term "t" by term "v" and eventually returns the new formula.
      java.util.Set<? extends Atom> getAtoms()
      Processes the set of all atoms which appear in this formula
      java.lang.Class<? extends Predicate> getPredicateCls()  
      java.util.Set<Variable> getUnboundVariables()  
      boolean isGround()
      Checks whether this formula is ground, i.e.
      boolean isLiteral()  
      boolean isWellFormed()
      Checks if this formula is well formed in the logical langauge.
      AbaElement<T> substitute​(java.util.Map<? extends Term<?>,​? extends Term<?>> map)
      Substitutes all occurrences of all terms "v" in map.keyset() in this formula by map.get(v) and returns the new formula.
      abstract AbaElement<T> substitute​(Term<?> v, Term<?> t)
      Substitutes all occurrences of term "v" in this formula by term "t" and returns the new formula.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • AbaElement

        public AbaElement()

    • Method Detail

      • containsTermsOfType

        public <C extends Term<?>> boolean containsTermsOfType​(java.lang.Class<C> cls)
        Description copied from interface: LogicStructure
        Checks if this logical structure contains at least one term of type C. This method is a shortcut for !getTerms(TermImplementation.class).isEmpty().
        Specified by:
        containsTermsOfType in interface LogicStructure
        Type Parameters:
        C - the type of terms
        Parameters:
        cls - The class structure representing the type C of the term.
        Returns:
        True if this logical structure contains at least one term of type C or false otherwise.

      • substitute

        public abstract AbaElement<T> substitute​(Term<?> v,
                                         Term<?> t)
                                  throws java.lang.IllegalArgumentException
        Description copied from interface: ComplexLogicalFormula
        Substitutes all occurrences of term "v" in this formula by term "t" and returns the new formula.
        Specified by:
        substitute in interface ComplexLogicalFormula
        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

      • substitute

        public AbaElement<T> substitute​(java.util.Map<? extends Term<?>,​? extends Term<?>> map)
                         throws java.lang.IllegalArgumentException
        Description copied from interface: ComplexLogicalFormula
        Substitutes all occurrences of all terms "v" in map.keyset() in this formula by map.get(v) and returns the new formula.
        Specified by:
        substitute in interface ComplexLogicalFormula
        Parameters:
        map - a mapping defining which terms to be substituted.
        Returns:
        a formula where every term in map.keyset() has been replaced by map.get(v).
        Throws:
        java.lang.IllegalArgumentException - if any term and its mapping are of different sorts

      • exchange

        public AbaElement<T> exchange​(Term<?> v,
                              Term<?> t)
                       throws java.lang.IllegalArgumentException
        Description copied from interface: ComplexLogicalFormula
        Substitutes all occurrences of term "v" in this formula by term "t" and at the same time replaces all occurrences of term "t" by term "v" and eventually returns the new formula.
        Specified by:
        exchange in interface ComplexLogicalFormula
        Parameters:
        v - a term.
        t - a term.
        Returns:
        a new logical formula with both "v" and "t" exchanged.
        Throws:
        java.lang.IllegalArgumentException - if "v" and "t" are of different sorts

      • isGround

        public boolean isGround()
        Description copied from interface: ComplexLogicalFormula
        Checks whether this formula is ground, i.e. whether there appears no variable in this formula.
        Specified by:
        isGround in interface ComplexLogicalFormula
        Returns:
        "true" if this formula is ground.

      • isWellFormed

        public boolean isWellFormed()
        Description copied from interface: ComplexLogicalFormula
        Checks if this formula is well formed in the logical langauge. What well- formed means is highly language dependent and the documentation of implementing sub classes shall describe the well formed term for the language they model.
        Specified by:
        isWellFormed in interface ComplexLogicalFormula
        Returns:
        true if the formula is well-formed, false otherwise

      • allSubstitutions

        public java.util.Set<java.util.Map<Variable,​Term<?>>> allSubstitutions​(java.util.Collection<? extends Term<?>> terms)
                                                                      throws java.lang.IllegalArgumentException
        Computes all possible substitutions, i.e. maps from variables to terms, of unbound variables of this formula's inner fol formulas to terms in "terms".
        Parameters:
        terms - a set of terms.
        Returns:
        a set of maps from variables to terms.
        Throws:
        java.lang.IllegalArgumentException - if there is an unbound variable in this formula for which there is no term in "terms" with the same sort.

      • allGroundInstances

        public java.util.Set<? extends AbaElement<T>> allGroundInstances​(java.util.Set<Constant> constants)
        Computes all ground instances of all inner fol formulas wrt. the given set of constants, i.e. every formula where each occurrence of some unbound variable is replaced by some constant.
        Parameters:
        constants - a set of constants
        Returns:
        a set of ground instances of this formula
        Throws:
        java.lang.IllegalArgumentException - if there is an unbound variable in this formula for which there is no constant in "constants" with the same sort.

      • getUnboundVariables

        public java.util.Set<Variable> getUnboundVariables()

      • isLiteral

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

      • getAtoms

        public java.util.Set<? extends Atom> getAtoms()
        Description copied from interface: SimpleLogicalFormula
        Processes the set of all atoms which appear in this formula
        Specified by:
        getAtoms in interface SimpleLogicalFormula
        Returns:
        The set of all atoms