Making changes to source code

[Allyson Gwin]

I need to change the XYSeries and XYSeriesCollection source codes to not sort. I want my graphs to appear the way the data is entered in. I found the source code, but don't see anywhere that it is sorted.

Also, I am using jbuilder 7 to write my code and have this in my class libraries (equivalent to the classpath):

C:/jfreechart/jfreechart-0.9.4/jfreechart-0.9.4.jar
C:/jfreechart/jfreechart-0.9.4/jfreechart-0.9.4.jar/com/jrefinery
C:/jfreechart/jfreechart-0.9.4/lib/jcommon-0.7.1.jar

How do I get the compiled version of the XYSeries back into the jar file that it goes to? I am pretty new to java so I guess I am a little bit confused as to how to make these changes.

Thanks.

Allyson

[A Developer]

All you need to do is modify the code, recompile, and create a new .jar file.

You probably want to take the jfreechart*jar out of your classpath to test your code changes.

[Allyson Gwin]

Thanks for that. I guess I don't see in the code where to modify it because I don't see anywhere that it is sorting the data. Here is the code (although I am sure everyone has it):


/* ============================================
* JFreeChart : a free Java chart class library
* ============================================
*
* Project Info: http://www.object-refinery.com/jfreechart/index.html
* Project Lead: David Gilbert (david.gilbert@object-refinery.com);
*
* (C) Copyright 2000-2002, by Simba Management Limited and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* -------------
* XYSeries.java
* -------------
* (C) Copyright 2001, Simba Management Limited and Contributors.
*
* Original Author: David Gilbert (for Simba Management Limited);
* Contributor(s): Aaron Metzger;
*
* $Id: XYSeries.java,v 1.5 2002/10/11 19:54:35 mungady Exp $
*
* Changes
* -------
* 15-Nov-2001 : Version 1 (DG);
* 03-Apr-2002 : Added an add(double, double) method (DG);
* 29-Apr-2002 : Added a clear() method (ARM);
* 06-Jun-2002 : Updated Javadoc comments (DG);
* 29-Aug-2002 : Modified to give user control over whether or not duplicate x-values are
* allowed (DG);
* 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/

package com.jrefinery.data;

import java.util.Collections;
import java.util.List;

/**
* Represents a sequence of zero or more data pairs in the form (x, y).
*
* @author DG
*/
public class XYSeries extends Series {

/** The list of data pairs in the series. */
private List data;

/** A flag that controls whether or not duplicate x-values are allowed. */
private boolean allowDuplicateXValues;

/**
* Constructs a new xy-series that contains no data.
* <p>
* By default, duplicate x-values will be allowed for the series.
*
* @param name the series name.
*/
public XYSeries(String name) {
this(name, true);
}

/**
* Constructs a new xy-series that contains no data. You can specify whether or not
* duplicate x-values are allowed for the series.
*
* @param name the series name.
* @param allowDuplicateXValues a flag that controls whether duplicate x-values are allowed.
*/
public XYSeries(String name, boolean allowDuplicateXValues) {
super(name);
this.allowDuplicateXValues = allowDuplicateXValues;
this.data = new java.util.ArrayList();
}

/**
* Returns the number of items in the series.
*
* @return The item count.
*/
public int getItemCount() {
return data.size();
}

/**
* Adds a data item to the series.
*
* @param pair the (x, y) pair.
*
* @throws SeriesException if there is a problem adding the data.
*/
public void add(XYDataPair pair) throws SeriesException {

// check arguments...
if (pair == null) {
throw new IllegalArgumentException("XYSeries.add(...): null item not allowed.");
}

// make the change (if it's not a duplicate x-value)...
int index = Collections.binarySearch(data, pair);
if (index < 0) {
data.add(-index - 1, pair);
fireSeriesChanged();
}
else {
if (allowDuplicateXValues == true) {
data.add(index, pair);
fireSeriesChanged();
}
else {
throw new SeriesException("XYSeries.add(...): x-value already exists.");
}
}

}

/**
* Adds a data item to the series.
*
* @param x the x value.
* @param y the y value.
*
* @throws SeriesException if there is a problem adding the data.
*/
public void add(double x, double y) throws SeriesException {

this.add(new Double(x), new Double(y));

}

/**
* Adds a data item to the series.
* <P>
* The unusual pairing of parameter types is to make it easier to add null y-values.
*
* @param x the x value.
* @param y the y value.
*
* @throws SeriesException if there is a problem adding the data.
*/
public void add(double x, Number y) throws SeriesException {

this.add(new Double(x), y);

}

/**
* Adds new data to the series.
* <P>
* Throws an exception if the x-value is a duplicate AND the allowDuplicateXValues flag is
* false.
*
* @param x the x-value.
* @param y the y-value.
*
* @throws SeriesException if there is a problem adding the data.
*/
public void add(Number x, Number y) throws SeriesException {

XYDataPair pair = new XYDataPair(x, y);
add(pair);

}

/**
* Deletes a range of items from the series.
*
* @param start The start index (zero-based).
* @param end The end index (zero-based).
*/
public void delete(int start, int end) {
for (int i = start; i <= end - start; i++) {
data.remove(start);
}
fireSeriesChanged();
}

/**
* Removes all data pairs from the series.
*/
public void clear() {

if (data.size() > 0) {
data.clear();
fireSeriesChanged();
}

}

/**
* Return the data pair with the specified index.
*
* @param index The index.
*
* @return The data pair with the specified index.
*/
public XYDataPair getDataPair(int index) {
return (XYDataPair) data.get(index);
}

/**
* Returns the x-value at the specified index.
*
* @param index The index.
*
* @return The x-value.
*/
public Number getXValue(int index) {
return getDataPair(index).getX();
}

/**
* Returns the y-value at the specified index.
*
* @param index The index.
*
* @return The y-value.
*/
public Number getYValue(int index) {
return getDataPair(index).getY();
}

/**
* Updates the value of an item in the series.
*
* @param index The item (zero based index).
* @param y The new value.
*/
public void update(int index, Number y) {
XYDataPair pair = getDataPair(index);
pair.setY(y);
fireSeriesChanged();
}

/**
* Returns a clone of the series.
*
* @return a clone of the time series.
*/
public Object clone() {

Object clone = createCopy(0, getItemCount() - 1);
return clone;

}

/**
* Creates a new series by copying a subset of the data in this time series.
*
* @param start The index of the first item to copy.
* @param end The index of the last item to copy.
*
* @return A series containing a copy of this series from start until end.
*/
public XYSeries createCopy(int start, int end) {

XYSeries copy = (XYSeries) super.clone();
//copy.listeners = new java.util.ArrayList();
//copy.propertyChangeSupport = new PropertyChangeSupport(copy);

copy.data = new java.util.ArrayList();
if (data.size() > 0) {
for (int index = start; index <= end; index++) {
XYDataPair pair = (XYDataPair) this.data.get(index);
XYDataPair clone = (XYDataPair) pair.clone();
try {
copy.add(clone);
}
catch (SeriesException e) {
System.err.println("XYSeries.createCopy(): unable to add cloned data pair.");
}
}
}

return copy;

}

}

If I remove the jfreechart*.jar from my classpath, then I will be missing lots of other stuff, too. Does that mean that I have to recompile everything and make a whole new .jar file that contains everything?

Thanks.

Allyson