org.jmat.function.expressionParser
Class Evaluator.Node

java.lang.Object
  |
  +--org.jmat.function.expressionParser.Evaluator.Node

Enclosing class:

Evaluator

protected class Evaluator.Node

extends java.lang.Object

Field Summary

Evaluator.Node	nLeft
int	nLevel
Evaluator.Operator	nOperator
Evaluator.Node	nParent
Evaluator.Node	nRight
java.lang.String	nString
java.lang.Object	nValue

Constructor Summary

Evaluator.Node(Evaluator.Node parent, java.lang.String s, int level)

Evaluator.Node(java.lang.String s)

Method Summary

protected void	_D(java.lang.String s)
protected java.lang.String	addZero(java.lang.String s) returns a string that doesnt start with a + or a -
protected int	checkBrackets(java.lang.String s) checks if there is any missing brackets
protected Evaluator.Node	getLeft()
protected int	getLevel()
protected Evaluator.Operator	getOperator()
protected Evaluator.Node	getRight()
protected java.lang.String	getString()
protected java.lang.Object	getValue()
protected boolean	hasChild()
protected boolean	hasLeft()
protected boolean	hasOperator()
protected boolean	hasRight()
java.lang.String	removeBrackets(java.lang.String s) Removes spaces, tabs and brackets at the begining
java.lang.String	removeIllegalCharacters(java.lang.String s) Removes illegal characters
protected void	setValue(java.lang.Object f)
void	trace() displays the tree of the expression

Methods inherited from class java.lang.Object

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

Field Detail

nString

public java.lang.String nString

nOperator

public Evaluator.Operator nOperator

nLeft

public Evaluator.Node nLeft

nRight

public Evaluator.Node nRight

nParent

public Evaluator.Node nParent

nLevel

public int nLevel

nValue

public java.lang.Object nValue

Constructor Detail

Evaluator.Node

public Evaluator.Node(java.lang.String s)
               throws java.lang.Exception

Evaluator.Node

public Evaluator.Node(Evaluator.Node parent,
                      java.lang.String s,
                      int level)
               throws java.lang.Exception

Method Detail

checkBrackets

protected int checkBrackets(java.lang.String s)

checks if there is any missing brackets

Returns:

true if s is valid

addZero

protected java.lang.String addZero(java.lang.String s)

returns a string that doesnt start with a + or a -

trace

public void trace()

displays the tree of the expression

hasChild

protected boolean hasChild()

hasOperator

protected boolean hasOperator()

hasLeft

protected boolean hasLeft()

getLeft

protected Evaluator.Node getLeft()

hasRight

protected boolean hasRight()

getRight

protected Evaluator.Node getRight()

getOperator

protected Evaluator.Operator getOperator()

getLevel

protected int getLevel()

getValue

protected java.lang.Object getValue()

setValue

protected void setValue(java.lang.Object f)

getString

protected java.lang.String getString()

removeBrackets

public java.lang.String removeBrackets(java.lang.String s)

Removes spaces, tabs and brackets at the begining

removeIllegalCharacters

public java.lang.String removeIllegalCharacters(java.lang.String s)

Removes illegal characters

_D

protected void _D(java.lang.String s)