net.sourceforge.webcompmath.functions.beans
Class WCMDerivativeBean

java.lang.Object
  net.sourceforge.webcompmath.functions.FunctionParserExtension
      net.sourceforge.webcompmath.functions.WrapperFunction
          net.sourceforge.webcompmath.functions.beans.WCMDerivativeBean

All Implemented Interfaces:

java.io.Serializable, ParserMathObject, ExpressionCommand, Function, MathObject, ParserExtension

public class WCMDerivativeBean
extends WrapperFunction
implements ParserMathObject

This class is used with GUI builders to create an object that is the derivative of some function. When you set it's function, it gets the derivative of the function you pass in and uses that as it's own definition (via a WrapperFunction).

Author:

Tom Downey

See Also:

Serialized Form

Field Summary

Fields inherited from class net.sourceforge.webcompmath.functions.FunctionParserExtension

name

Constructor Summary

WCMDerivativeBean()
The default constructor.

Method Summary

void	addPropertyChangeListener(java.beans.PropertyChangeListener listener) Just pass through to the support class
MathObject	getMathObject() Returns itself
void	redefine() Update the derivative if the function changes.
void	removePropertyChangeListener(java.beans.PropertyChangeListener listener) just pass through to the support class )
void	setFunction(Function f) Set this object's function to the derivative of the argument.
void	setName(java.lang.String name) Fire a property change event if the name changes.
java.lang.String	toString() Return the toString of the super class, unless the function is an ExpressionFunction (which is too wordy in it's toString).

Methods inherited from class net.sourceforge.webcompmath.functions.WrapperFunction

apply, dependsOn, derivative, derivative, getArity, getFunction, getVal, getValueWithCases

Methods inherited from class net.sourceforge.webcompmath.functions.FunctionParserExtension

appendOutputString, compileDerivative, doParse, extent, getName, setParensCanBeOptional

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sourceforge.webcompmath.data.MathObject

getName

Constructor Detail

WCMDerivativeBean

public WCMDerivativeBean()

The default constructor. Initializes the function to a constant 0 function, so that GUI builder setter ordering issues don't cause null pointer exceptions. The actualy function whose derivative this bean is supposed to represent needs to be set before the bean will actually do useful work.

Method Detail

setFunction

public void setFunction(Function f)

Set this object's function to the derivative of the argument. Always assumes that the variable that the derivative is taken with respect to is the first one (or usually the only one) in the parameters that were defined with f.

Overrides:

setFunction in class WrapperFunction

Parameters:

f - The non-null function to be used in this WrapperFunction object. It must have the same arity as the current function.

See Also:

WrapperFunction.setFunction(net.sourceforge.webcompmath.data.Function)

redefine

public void redefine()

Update the derivative if the function changes. Useful if the function is an ExpressionFunction.

getMathObject

public MathObject getMathObject()

Returns itself

Specified by:

getMathObject in interface ParserMathObject

Returns:

the MathObject that will be added to a parser

See Also:

ParserMathObject.getMathObject()

addPropertyChangeListener

public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

Just pass through to the support class

Specified by:

addPropertyChangeListener in interface ParserMathObject

See Also:

ParserMathObject.addPropertyChangeListener(java.beans.PropertyChangeListener)

removePropertyChangeListener

public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

just pass through to the support class )

Specified by:

removePropertyChangeListener in interface ParserMathObject

See Also:

ParserMathObject.removePropertyChangeListener(java.beans.PropertyChangeListener)

setName

public void setName(java.lang.String name)

Fire a property change event if the name changes.

Specified by:

setName in interface MathObject

Overrides:

setName in class FunctionParserExtension

Parameters:

name - name of the object

See Also:

FunctionParserExtension.setName(java.lang.String)

toString

public java.lang.String toString()

Return the toString of the super class, unless the function is an ExpressionFunction (which is too wordy in it's toString).

Overrides:

toString in class WrapperFunction

See Also:

WrapperFunction.toString()