/* ===========================================================
* 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.]
*
* ---------
* Task.java
* ---------
* (C) Copyright 2003-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 10-Jan-2003 : Version 1 (DG);
* 16-Sep-2003 : Added percentage complete (DG);
* 30-Jul-2004 : Added clone() and equals() methods and implemented
* Serializable (DG);
*
*/
package org.jfree.data.gantt;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import org.jfree.data.time.SimpleTimePeriod;
import org.jfree.data.time.TimePeriod;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PublicCloneable;
/**
* A simple representation of a task. The task has a description and a
* duration. You can add sub-tasks to the task.
*/
public class Task implements Cloneable, PublicCloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 1094303785346988894L;
/** The task description. */
private String description;
/** The time period for the task (estimated or actual). */
private TimePeriod duration;
/** The percent complete (<code>null</code> is permitted). */
private Double percentComplete;
/** Storage for the sub-tasks (if any). */
private List subtasks;
/**
* Creates a new task.
*
* @param description the task description (<code>null</code> not
* permitted).
* @param duration the task duration (<code>null</code> permitted).
*/
public Task(String description, TimePeriod duration) {
if (description == null) {
throw new IllegalArgumentException("Null 'description' argument.");
}
this.description = description;
this.duration = duration;
this.percentComplete = null;
this.subtasks = new java.util.ArrayList();
}
/**
* Creates a new task.
*
* @param description the task description (<code>null</code> not
* permitted).
* @param start the start date (<code>null</code> not permitted).
* @param end the end date (<code>null</code> not permitted).
*/
public Task(String description, Date start, Date end) {
this(description, new SimpleTimePeriod(start, end));
}
/**
* Returns the task description.
*
* @return The task description (never <code>null</code>).
*/
public String getDescription() {
return this.description;
}
/**
* Sets the task description.
*
* @param description the description (<code>null</code> not permitted).
*/
public void setDescription(String description) {
if (description == null) {
throw new IllegalArgumentException("Null 'description' argument.");
}
this.description = description;
}
/**
* Returns the duration (actual or estimated) of the task.
*
* @return The task duration (possibly <code>null</code>).
*/
public TimePeriod getDuration() {
return this.duration;
}
/**
* Sets the task duration (actual or estimated).
*
* @param duration the duration (<code>null</code> permitted).
*/
public void setDuration(TimePeriod duration) {
this.duration = duration;
}
/**
* Returns the percentage complete for this task.
*
* @return The percentage complete (possibly <code>null</code>).
*/
public Double getPercentComplete() {
return this.percentComplete;
}
/**
* Sets the percentage complete for the task.
*
* @param percent the percentage (<code>null</code> permitted).
*/
public void setPercentComplete(Double percent) {
this.percentComplete = percent;
}
/**
* Sets the percentage complete for the task.
*
* @param percent the percentage.
*/
public void setPercentComplete(double percent) {
setPercentComplete(new Double(percent));
}
/**
* Adds a sub-task to the task.
*
* @param subtask the subtask (<code>null</code> not permitted).
*/
public void addSubtask(Task subtask) {
if (subtask == null) {
throw new IllegalArgumentException("Null 'subtask' argument.");
}
this.subtasks.add(subtask);
}
/**
* Removes a sub-task from the task.
*
* @param subtask the subtask.
*/
public void removeSubtask(Task subtask) {
this.subtasks.remove(subtask);
}
/**
* Returns the sub-task count.
*
* @return The sub-task count.
*/
public int getSubtaskCount() {
return this.subtasks.size();
}
/**
* Returns a sub-task.
*
* @param index the index.
*
* @return The sub-task.
*/
public Task getSubtask(int index) {
return (Task) this.subtasks.get(index);
}
/**
* Tests this object for equality with an arbitrary object.
*
* @param object the other object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object object) {
if (object == this) {
return true;
}
if (!(object instanceof Task)) {
return false;
}
Task that = (Task) object;
if (!ObjectUtilities.equal(this.description, that.description)) {
return false;
}
if (!ObjectUtilities.equal(this.duration, that.duration)) {
return false;
}
if (!ObjectUtilities.equal(this.percentComplete,
that.percentComplete)) {
return false;
}
if (!ObjectUtilities.equal(this.subtasks, that.subtasks)) {
return false;
}
return true;
}
/**
* Returns a clone of the task.
*
* @return A clone.
*
* @throws CloneNotSupportedException never thrown by this class, but
* subclasses may not support cloning.
*/
public Object clone() throws CloneNotSupportedException {
Task clone = (Task) super.clone();
return clone;
}
}
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