/*
 * This file is part of ADDIS (Aggregate Data Drug Information System).
 * ADDIS is distributed from http://drugis.org/.
 * Copyright (C) 2009 Gert van Valkenhoef, Tommi Tervonen.
 * Copyright (C) 2010 Gert van Valkenhoef, Tommi Tervonen, 
 * Tijs Zwinkels, Maarten Jacobs, Hanno Koeslag, Florin Schimbinschi, 
 * Ahmad Kamal, Daniel Reid.
 * Copyright (C) 2011 Gert van Valkenhoef, Ahmad Kamal, 
 * Daniel Reid, Florin Schimbinschi.
 *
 * 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 3 of the License, or
 * (at your option) 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, see <http://www.gnu.org/licenses/>.
 */

package org.drugis.common.threading.status;

import org.drugis.common.threading.Task;
import org.drugis.common.threading.TaskListener;
import org.drugis.common.threading.activity.ActivityModel;
import org.drugis.common.threading.activity.ActivityTask;
import org.drugis.common.threading.event.TaskEvent;

import com.jgoodies.binding.value.AbstractValueModel;

/**
 * Listens to a Task in and ActivityTask and returns true if the current task is the one given
 * Usually constructed with a String referring to the toString (name) of the task to be checked 
 */
@SuppressWarnings("serial")
public class ActivityTaskInPhase extends AbstractValueModel implements TaskListener {
	private boolean d_val;
	private ActivityModel d_model; 
	private String d_taskName;
	
	public ActivityTaskInPhase(ActivityTask activityTask, Task task) {
		this(activityTask, task.toString());
	}
	
	public ActivityTaskInPhase(ActivityTask activityTask, String taskName) {
		d_taskName = taskName;
		d_val = false;
		d_model = activityTask.getModel();
		for (Task t : d_model.getStates()) { 		
			if(d_taskName.equals(t.toString())) { 
				t.addTaskListener(this);
				d_val = d_val || (t.isStarted() && !t.isFinished());
			}
		}
	}

	public Boolean getValue() {
		return d_val;
	}

	public void setValue(Object newValue) {
		throw new IllegalAccessError("ActivityTaskInPhase is read-only");
	}

	public void taskEvent(TaskEvent event) {
		boolean oldval = d_val;
		Task eventSource = event.getSource();
		d_val = eventSource.isStarted() && !eventSource.isFinished();
		fireValueChange(oldval, d_val);
	}
}