Package evaluator

Class ExpressionEvaluator

java.lang.Object

evaluator.ExpressionEvaluator

All Implemented Interfaces:

Evaluator

public class ExpressionEvaluator
extends Object
implements Evaluator

Implementation of the Evaluator interface

Since:

April 2025

Version:

1.0

Author:

Saptarshi Dey

Field Summary

Fields inherited from interface evaluator.Evaluator

terminalSymbols

Constructor Summary

Constructors

Constructor	Description
ExpressionEvaluator()	Default constructor
ExpressionEvaluator(Map<String,Complex> variables_)	Parameterised constructor

Method Summary

Modifier and Type	Method	Description
Complex	complexEvaluator(String equation, boolean verbose)	The function that connects all the modules together and computes the result
String	evaluateEquation(String equation, int precision, boolean verbose)	Wrapper for complexEvaluator function
Complex	getVariable(String variable)	Getter to get individual variables
void	removeVariable(String variable)	Remove a variable from the variables Map Object
void	setVariable(String variable, double value)	Setter for the variables Map Object for real values
void	setVariable(String variable, Complex value)	Setter for the variables Map Object for Complex values
void	setVariables(Map<String,Complex> variables_)	Setter to set the whole variables Map Object at once

Methods inherited from class java.lang.Object

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

Constructor Details

ExpressionEvaluator

public ExpressionEvaluator()

Default constructor

ExpressionEvaluator

public ExpressionEvaluator(Map<String,Complex> variables_)

Parameterised constructor

Parameters:

variables_ - Map Object representing variables to be used while evaluating any function

Method Details

setVariable

public void setVariable(String variable,
 Complex value)

Setter for the variables Map Object for Complex values

Parameters:

variable - Name of the variable

value - Value of th variable

setVariable

public void setVariable(String variable,
 double value)

Setter for the variables Map Object for real values

Parameters:

variable - Name of the variable

value - Value of the variable

setVariables

public void setVariables(Map<String,Complex> variables_)

Setter to set the whole variables Map Object at once

Parameters:

variables_ - Map object of all the variables

getVariable

public Complex getVariable(String variable)

Getter to get individual variables

Parameters:

variable - Name of the variable

Returns:

Complex number representing the value of the variable

removeVariable

public void removeVariable(String variable)

Remove a variable from the variables Map Object

Parameters:

variable - Name of the variable

complexEvaluator

public Complex complexEvaluator(String equation,
 boolean verbose)
                         throws Exception

The function that connects all the modules together and computes the result

Parameters:

equation - String repesentation of the equation

verbose - Whether or not to show the computation

Returns:

Resultant Complex number

Throws:

Exception

evaluateEquation

public String evaluateEquation(String equation,
 int precision,
 boolean verbose)
                        throws Exception

Wrapper for complexEvaluator function

Specified by:

evaluateEquation in interface Evaluator

Parameters:

equation - String repesentation of the equation

precision - Precision of fractional part of the real and imaginary values

verbose - Whether or not to show the computation

Returns:

String value representing the result

Throws:

Exception