Pandora.LogicParser.Formula
Class Not

java.lang.Object
  Pandora.LogicParser.Formula.Formula
      Pandora.LogicParser.Formula.Not

All Implemented Interfaces:

java.io.Serializable

public class Not
extends Formula

The Not formula.
Extends abstract class Formula.

See Also:

Serialized Form

Constructor Summary

Not(Formula formula)
Constructs a Not Formula.

Method Summary

void	addToSignature(PanSignature signature) This method adds the Atoms and Terms of this Formula to the passed PanSignature IF it is not already in the signature.
boolean	checkSub(Term x, Term y, Formula f) Returns true if the passed formula f can be reached by substituting th eoccurrences of Term x by Term y in this Formula.
java.lang.String	clashes(PanSignature signature) Returns a String containing an Error character if this Formula clashes with the passed PanSignature, Otherwise it will return an Empty String "" A Not Formula clashes with a signature if any of its left or right sub-Formulae clashes with the signature.
java.lang.String	display() Returns the a String to display the Implies formula.
Formula	getFormula() Returns the formula on which negation is applied.
int	getPrecedence() Returns an integer representing the precedence of this formula according to binding conventions
java.util.List<Term>	getTerms() This method returns a list of all the Terms this Formula contain.
Formula	regenerate() Returns a copy of the Formula which can be saved as part of the copy made for the undo function.
Formula	s() Creates SVar to replace PVar in the formula where necessary.
void	setAtoms() Obtains the atoms in the formula and adds them to the list of atoms for the tree which contains this formula.
void	setVars(Var v) This method adds Var v to the list of variables this formula is bound to.
Formula	subAll(Term x, Term y) Returns the Formula that is derived after substituting ALL the occurrences of Term x with Term y in this Formula.

Methods inherited from class Pandora.LogicParser.Formula.Formula

check, concatNoDup, getAtoms, getLeft, getRight, getTuples, getVars, higher, isBracketed, map, setLeft, setRight, setTuples, showTuples, sub

Methods inherited from class java.lang.Object

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

Constructor Detail

Not

public Not(Formula formula)

Constructs a Not Formula.

Parameters:

formula - Formula represents the formula on which not is applied.

Method Detail

getFormula

public Formula getFormula()

Returns the formula on which negation is applied.

display

public java.lang.String display()

Returns the a String to display the Implies formula.

Specified by:

display in class Formula

setAtoms

public void setAtoms()

Obtains the atoms in the formula and adds them to the list of atoms for the tree which contains this formula.
The list of atoms is found in Formula class.

Specified by:

setAtoms in class Formula

checkSub

public boolean checkSub(Term x,
                        Term y,
                        Formula f)

Returns true if the passed formula f can be reached by substituting th eoccurrences of Term x by Term y in this Formula.

Specified by:

checkSub in class Formula

Parameters:

x - Term represents the Term to be substituted.

y - Term represents the Term to substitute Term x.

f - Formula represents the Formula to check if it can be reached after substitution.

subAll

public Formula subAll(Term x,
                      Term y)

Returns the Formula that is derived after substituting ALL the occurrences of Term x with Term y in this Formula.

Specified by:

subAll in class Formula

Parameters:

x - Term represents the Term to be substituted.

y - Term represents the Term to substitute Term x.

setVars

public void setVars(Var v)

This method adds Var v to the list of variables this formula is bound to.

Specified by:

setVars in class Formula

Parameters:

v - Var represents the Var to be added to the list of this formula's variables.

clashes

public java.lang.String clashes(PanSignature signature)

Returns a String containing an Error character if this Formula clashes with the passed PanSignature, Otherwise it will return an Empty String ""
A Not Formula clashes with a signature if any of its left or right sub-Formulae clashes with the signature.

Specified by:

clashes in class Formula

Parameters:

signature - PanSignature represents the PanSignature to be checked if this Formula clashes with.

addToSignature

public void addToSignature(PanSignature signature)

This method adds the Atoms and Terms of this Formula to the passed PanSignature IF it is not already in the signature.

Specified by:

addToSignature in class Formula

Parameters:

signature - PanSignature represents the signature to add this Formula to.

getTerms

public java.util.List<Term> getTerms()

This method returns a list of all the Terms this Formula contain.

Specified by:

getTerms in class Formula

s

public Formula s()

Creates SVar to replace PVar in the formula where necessary. Used in Raptor.

Specified by:

s in class Formula

regenerate

public Formula regenerate()

Returns a copy of the Formula which can be saved as part of the copy made for the undo function.

Specified by:

regenerate in class Formula

getPrecedence

public int getPrecedence()

Returns an integer representing the precedence of this formula according to binding conventions

Specified by:

getPrecedence in class Formula