?? datasetrenderingorder.java
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/* ======================================
* JFreeChart : a free Java chart library
* ======================================
*
* Project Info: http://www.jfree.org/jfreechart/index.html
* Project Lead: David Gilbert (david.gilbert@object-refinery.com);
*
* (C) Copyright 2000-2003, by Object Refinery 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.
*
* --------------------------
* DatasetRenderingOrder.java
* --------------------------
* (C) Copyright 2003 by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: DatasetRenderingOrder.java,v 1.5 2003/08/20 11:56:02 mungady Exp $
*
* Changes:
* --------
* 02-May-2003 : Version 1 (DG);
*
*/
package org.jfree.chart.plot;
import java.io.ObjectStreamException;
import java.io.Serializable;
/**
* Used to indicate the rendering order for datasets in a {@link org.jfree.chart.plot.CategoryPlot}
* or an {@link org.jfree.chart.plot.XYPlot}.
*
* @author David Gilbert
*/
public final class DatasetRenderingOrder implements Serializable {
/** The standard order is to render the primary dataset last. */
public static final DatasetRenderingOrder STANDARD
= new DatasetRenderingOrder("DatasetRenderingOrder.STANDARD");
/** The reverse order renders the primary dataset first. */
public static final DatasetRenderingOrder REVERSE
= new DatasetRenderingOrder("DatasetRenderingOrder.REVERSE");
/** The name. */
private String name;
/**
* Private constructor.
*
* @param name the name.
*/
private DatasetRenderingOrder(String name) {
this.name = name;
}
/**
* Returns a string representing the object.
*
* @return The string.
*/
public String toString() {
return this.name;
}
/**
* Returns <code>true</code> if this object is equal to the specified object, and
* <code>false</code> otherwise.
*
* @param o the other object.
*
* @return A boolean.
*/
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof DatasetRenderingOrder)) {
return false;
}
final DatasetRenderingOrder order = (DatasetRenderingOrder) o;
if (!this.name.equals(order.toString())) {
return false;
}
return true;
}
/**
* Ensures that serialization returns the unique instances.
*
* @return The object.
*
* @throws ObjectStreamException if there is a problem.
*/
private Object readResolve() throws ObjectStreamException {
if (this.equals(DatasetRenderingOrder.STANDARD)) {
return DatasetRenderingOrder.STANDARD;
}
else if (this.equals(DatasetRenderingOrder.REVERSE)) {
return DatasetRenderingOrder.REVERSE;
}
return null;
}
}
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