/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------
* DatasetGroup.java
* -----------------
* (C) Copyright 2002-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 07-Oct-2002 : Version 1 (DG);
* 26-Mar-2003 : Implemented Serializable (DG);
* 20-Aug-2003 : Implemented Cloneable (DG);
*
*/
package org.jfree.data.general;
import java.io.Serializable;
/**
* A class that is used to group datasets (currently not used for any specific
* purpose).
*/
public class DatasetGroup implements Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = -3640642179674185688L;
/** The group id. */
private String id;
/**
* Constructs a new group.
*/
public DatasetGroup() {
super();
this.id = "NOID";
}
/**
* Creates a new group with the specified id.
*
* @param id the identification for the group.
*/
public DatasetGroup(String id) {
if (id == null) {
throw new IllegalArgumentException("Null 'id' argument.");
}
this.id = id;
}
/**
* Returns the identification string for this group.
*
* @return The identification string.
*/
public String getID() {
return this.id;
}
/**
* Clones the group.
*
* @return A clone.
*
* @throws CloneNotSupportedException not by this class.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* Tests this instance for equality with an arbitrary object.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof DatasetGroup)) {
return false;
}
DatasetGroup that = (DatasetGroup) obj;
if (!this.id.equals(that.id)) {
return false;
}
return true;
}
}
|