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//******************************************************************************
//
// File: TransformedSeries.java
// Package: edu.rit.numeric
// Unit: Class edu.rit.numeric.TransformedSeries
//
// This Java source file is copyright (C) 2007 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This Java source file is part of the Parallel Java Library ("PJ"). PJ is free
// software; you can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// PJ is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// Linking this library statically or dynamically with other modules is making a
// combined work based on this library. Thus, the terms and conditions of the
// GNU General Public License cover the whole combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent modules, and
// to copy and distribute the resulting executable under terms of your choice,
// provided that you also meet, for each linked independent module, the terms
// and conditions of the license of that module. An independent module is a
// module which is not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the library, but
// you are not obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************
package edu.rit.numeric;
/**
* Class TransformedSeries provides a {@linkplain Series} that is formed by
* transforming the values in an underlying {@linkplain Series}. The underlying
* series consists of a list of values <I>x</I><SUB><I>i</I></SUB>. The
* transformed series consists of a list of values
* <I>f</I>(<I>x</I><SUB><I>i</I></SUB>), where <I>f</I> is computed by a {@link
* Function </CODE>Function<CODE>}.
*
* @author Alan Kaminsky
* @version 27-Jul-2007
*/
public class TransformedSeries
extends Series
{
// Hidden data members.
private Series mySeries;
private Function myXFunction;
// Exported constructors.
/**
* Construct a new transformed series.
*
* @param theSeries Underlying series.
* @param theXFunction Function for transforming the X values, or null not
* to transform the X values.
*
* @exception NullPointerException
* (unchecked exception) Thrown if <TT>theSeries</TT> is null.
*/
public TransformedSeries
(Series theSeries,
Function theXFunction)
{
if (theSeries == null)
{
throw new NullPointerException
("TransformedSeries(): theSeries is null");
}
mySeries = theSeries;
myXFunction = theXFunction;
}
// Exported operations.
/**
* Returns the number of values in this series.
*
* @return Length.
*/
public int length()
{
return mySeries.length();
}
/**
* Returns the given X value in this series.
*
* @param i Index.
*
* @return The X value in this series at index <TT>i</TT>.
*
* @exception ArrayIndexOutOfBoundsException
* (unchecked exception) Thrown if <TT>i</TT> is not in the range
* <TT>0</TT> .. <TT>length()-1</TT>.
*/
public double x
(int i)
{
double xval = mySeries.x(i);
if (myXFunction != null) xval = myXFunction.f (xval);
return xval;
}
}
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