fr.ign.cogit.geoxygene.function

Class StringFunction

Object

AbstractFunction1D

StringFunction

All Implemented Interfaces:

Function1D

public class StringFunction
extends AbstractFunction1D

Author:

JeT String function use a string evaluator based on JEval to compute the function value from a human readable string

Constructor Summary

Constructors

Constructor and Description
StringFunction() Constructor
StringFunction(String expression) Constructor

Method Summary

Modifier and Type	Method and Description
Double	evaluate(double x) Compute the function value
String	getExpression()
String	help() Returns a String explaining the function and its arguments
void	setExpression(String expression)
String	toString()

Methods inherited from class AbstractFunction1D

getLowerBoundDF, getUpperBoundDF, getWithMatchLowerBound, getWithMatchUpperBound, isBetween, marshall, marshall, marshall, setDomainOfFunction, unmarshall, unmarshall

Methods inherited from class Object

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

Constructor Detail

StringFunction

public StringFunction()

Constructor

StringFunction

public StringFunction(String expression)

Constructor

Method Detail

getExpression

public String getExpression()

Returns:

the expression

setExpression

public void setExpression(String expression)

Parameters:

expression - the expression to set

help

public String help()

Description copied from interface: Function1D

Returns a String explaining the function and its arguments

Specified by:

help in interface Function1D

Specified by:

help in class AbstractFunction1D

Returns:

evaluate

public Double evaluate(double x)
                throws FunctionEvaluationException

Description copied from interface: Function1D

Compute the function value

Parameters:

x - variable value used to compute function value

Returns:

function value for the given x variable or null if outside of the definition domain

Throws:

FunctionEvaluationException

toString

public String toString()

Overrides:

toString in class Object