org.jacorb.idl

Class ConstExprEvaluator

public class ConstExprEvaluator extends Object

Based on the MathEvaluator class by The-Son LAI, Lts@writeme.com Expression evaluator for IDL constant expression Supports the following functions: +, -, *, /, ^, %, ^, | , <<, >>
When the getValue() is called, a Double object is returned. If it returns null, an error occured.

Version: $Id: ConstExprEvaluator.java,v 1.6 2006/06/02 13:02:56 alphonse.bendt Exp $

Author: Gerald Brose, The-Son LAI Lts@writeme.com

Nested Class Summary
protected class	ConstExprEvaluator.Node
protected class	ConstExprEvaluator.Operator

Field Summary
protected static ConstExprEvaluator.Operator[]	operators

Constructor Summary
	ConstExprEvaluator() creates an empty ConstExprEvaluator.
	ConstExprEvaluator(String s) creates a ConstExprEvaluator and assign the expression string.

Method Summary
protected ConstExprEvaluator.Operator[]	getOperators()
Double	getValue() evaluates and returns the value of the expression
Double	getVariable(String s) gets the variable's value that was assigned previously
void	reset() resets the evaluator
void	setExpression(String s) sets the expression