de.rwth.domains.templates
Class TabledFunction

java.lang.Object
  |
  +--de.rwth.domains.templates.TabledFunction

All Implemented Interfaces:

Function

public class TabledFunction

extends java.lang.Object

implements Function

This class represents functions by the table of their function values.

Version:

$Id: TabledFunction.java,v 1.2 2002/09/17 06:53:53 mohnen Exp $

Author:

Markus Mohnen

Inner classes inherited from class de.rwth.domains.Function

Function.Tools

Field Summary

protected Set	domain The domain of this function.
protected java.lang.Object[]	fValues This function's values in the sequence in which the elements of the domain occur with domains.iterator().
protected Set	range The range of this function.

Constructor Summary

TabledFunction(Set domain, Set range, java.lang.Object[] fValues)
Create a new function from domain, range, and function table.

Method Summary

java.lang.Object	apply(java.lang.Object x) Applies this function to an argument and returns the result.
boolean	equals(java.lang.Object o)
Set	getDomain() Returns the domain of this function.
Set	getRange() Returns the range (co-domain) of this function.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

domain

protected Set domain

The domain of this function.

range

protected Set range

The range of this function.

fValues

protected java.lang.Object[] fValues

This function's values in the sequence in which the elements of the domain occur with domains.iterator().

Constructor Detail

TabledFunction

public TabledFunction(Set domain,
                      Set range,
                      java.lang.Object[] fValues)
               throws java.lang.IllegalArgumentException

Create a new function from domain, range, and function table.

Parameters:

domain - a value of type Set

range - a value of type Set

fValues: - The function's values in the sequence in which the elements of the domain occur with domains.iterator().

Throws:

IllegalArgumentException - if

1. an element of fvalues is not in range
2. fValues has not enough values
3. fValues has too many values

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

getDomain

public Set getDomain()

Description copied from interface: Function

Returns the domain of this function.

Specified by:

getDomain in interface Function

Following copied from interface: de.rwth.domains.Function

Returns:

a value of type Set

getRange

public Set getRange()

Description copied from interface: Function

Returns the range (co-domain) of this function.

Specified by:

getRange in interface Function

Following copied from interface: de.rwth.domains.Function

Returns:

a value of type Set

apply

public java.lang.Object apply(java.lang.Object x)
                       throws FunctionException

Applies this function to an argument and returns the result.

Specified by:

apply in interface Function

Parameters:

x - the argument

Returns:

this function's value for argument x

Throws:

FunctionException - if x is not an element of the functions domain.