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/*
* jEdit - Programmer's Text Editor
* :tabSize=4:indentSize=4:noTabs=false:
* :folding=explicit:collapseFolds=1:
*
* Copyright (C) 2010 Matthieu Casanova
*
* This program 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 2
* of the License, or any later version.
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package org.gjt.sp.util;
import javax.swing.*;
/**
* A Task is a Runnable with progress.
*
* @since jEdit 4.4pre1
* @author Matthieu Casanova
*/
public abstract class Task implements Runnable, ProgressObserver
{
private long value;
private String status;
private long maximum;
private String label;
/**
* The thread in which the task is running.
* It is set automatically when the task starts.
*/
private volatile Thread thread;
private volatile SwingWorker.StateValue state;
private volatile boolean cancellable = true;
//{{{ Task Constructor
protected Task()
{
state = SwingWorker.StateValue.PENDING;
} //}}}
//{{{ run() method
@Override
public final void run()
{
state = SwingWorker.StateValue.STARTED;
TaskManager.instance.fireRunning(this);
try
{
thread = Thread.currentThread();
_run();
thread = null;
}
catch (Throwable t)
{
Log.log(Log.ERROR, this, t);
}
state = SwingWorker.StateValue.DONE;
TaskManager.instance.fireDone(this);
} //}}}
/**
* This is the method you have to implement and that will be executed
* in the thread.
*/
public abstract void _run();
@Override
public final void setValue(long value)
{
this.value = value;
TaskManager.instance.fireValueUpdated(this);
}
@Override
public final void setMaximum(long maximum)
{
this.maximum = maximum;
TaskManager.instance.fireMaximumUpdated(this);
}
@Override
public void setStatus(String status)
{
this.status = status;
TaskManager.instance.fireStatusUpdated(this);
}
public long getValue()
{
return value;
}
public String getStatus()
{
return status;
}
public long getMaximum()
{
return maximum;
}
public SwingWorker.StateValue getState()
{
return state;
}
public String getLabel()
{
return label;
}
public void setLabel(String label)
{
this.label = label;
}
public boolean isCancellable()
{
return cancellable;
}
public void setCancellable(boolean cancellable)
{
this.cancellable = cancellable;
}
//{{{ cancel() method
/**
* Cancel the task
*/
public void cancel()
{
if (cancellable && thread != null)
thread.interrupt();
} //}}}
@Override
public String toString()
{
return "Task[" + state + ',' + status + ',' + value + '/' + maximum + ']';
}
}
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