/*******************************************************************************
 * Copyright (c) 2000, 2006 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 com.aptana.deploy.wizard;

import org.eclipse.jface.viewers.IBasicPropertyConstants;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.ui.internal.dialogs.WizardCollectionElement;
import org.eclipse.ui.internal.registry.WizardsRegistryReader;

/**
 * A Viewer element sorter that sorts Elements by their name attribute. Note that capitalization differences are not
 * considered by this sorter, so a < B < c. NOTE exceptions to the above: an element with the system's reserved category
 * for Other Wizards will always be sorted such that it will ultimately be placed at the end of the sorted result, and
 * an element with the reserved category name for General wizards will always be placed at the beginning of the sorted
 * result.
 * 
 * @since 3.2
 */
@SuppressWarnings("restriction")
class DataTransferWizardCollectionComparator extends ViewerComparator
{
	/**
	 * Static instance of this class.
	 */
	public final static DataTransferWizardCollectionComparator INSTANCE = new DataTransferWizardCollectionComparator();

	/**
	 * Creates an instance of <code>DataTransferWizardCollectionSorter</code>. Since this is a stateless sorter, it is
	 * only accessible as a singleton; the private visibility of this constructor ensures this.
	 */
	private DataTransferWizardCollectionComparator()
	{
		super();
	}

	public int category(Object element)
	{
		if (element instanceof WizardCollectionElement)
		{
			String id = ((WizardCollectionElement) element).getId();
			if (WizardsRegistryReader.GENERAL_WIZARD_CATEGORY.equals(id))
			{
				return 1;
			}
			if (WizardsRegistryReader.UNCATEGORIZED_WIZARD_CATEGORY.equals(id))
			{
				return 3;
			}
			return 2;
		}
		return super.category(element);
	}

	/**
	 * Return true if this sorter is affected by a property change of propertyName on the specified element.
	 */
	public boolean isSorterProperty(Object object, String propertyId)
	{
		return propertyId.equals(IBasicPropertyConstants.P_TEXT);
	}
}