/*******************************************************************************
 * Copyright (c) 2003, 2010 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal.progress;

/**
 * SubTaskInfo is the class that displays a subtask in the tree.
 */
class SubTaskInfo extends JobTreeElement {

	protected String taskName;

	JobInfo jobInfo;

	/**
	 * Create a new instance of the receiver.
	 * 
	 * @param parentJob
	 * @param name
	 */
	SubTaskInfo(JobInfo parentJob, String name) {
		taskName = name;
		jobInfo = parentJob;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.progress.JobTreeElement#getChildren()
	 */
	Object[] getChildren() {
		return ProgressManagerUtil.EMPTY_OBJECT_ARRAY;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.progress.JobTreeElement#getDisplayString()
	 */
	String getDisplayString() {
		if (taskName == null) {
			return ProgressMessages.get().SubTaskInfo_UndefinedTaskName;
		}
		return taskName;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.progress.JobTreeElement#hasChildren()
	 */
	boolean hasChildren() {
		return false;
	}

	/**
	 * Set the taskName of the receiver.
	 * 
	 * @param name
	 */
	void setTaskName(String name) {
		if (name == null)
			taskName = ProgressMessages.get().SubTaskInfo_UndefinedTaskName;
		else
			this.taskName = name;
	}

	/**
	 * Returns the taskName of the receiver.
	 */
	String getTaskName() {
		return taskName;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.progress.JobTreeElement#getParent()
	 */
	public Object getParent() {
		return jobInfo;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.progress.JobTreeElement#isJobInfo()
	 */
	boolean isJobInfo() {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.progress.JobTreeElement#isActive()
	 */
	boolean isActive() {
		return jobInfo.isActive();
	}
}