org.eclipse.mylyn.reviews.r4e.ui/src/org/eclipse/mylyn/reviews/r4e/ui/internal/sorters/DateComparator.java

// $codepro.audit.disable com.instantiations.assist.eclipse.analysis.audit.rule.effectivejava.alwaysOverridetoString.alwaysOverrideToString, com.instantiations.assist.eclipse.analysis.deserializeabilitySecurity, com.instantiations.assist.eclipse.analysis.enforceCloneableUsageSecurity
/*******************************************************************************
 * Copyright (c) 2011, 2012 Ericsson AB 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:
 *     Ericsson AB - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.reviews.r4e.ui.internal.sorters;

import java.util.Date;

import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.mylyn.reviews.r4e.ui.internal.model.R4EUIComment;

/**
 * This class extends the default viewer comparator to compare two elements based on their creation date
 * 
 * @author Sebastien Dubois
 * @version $Revision: 1.0 $
 */
public class DateComparator extends ViewerComparator {

	// ------------------------------------------------------------------------
	// Methods
	// ------------------------------------------------------------------------

	/**
	 * Method compare.
	 * 
	 * @param viewer
	 *            Viewer
	 * @param e1
	 *            Object
	 * @param e2
	 *            Object
	 * @return int
	 */
	@SuppressWarnings("unchecked")
	@Override
	public int compare(Viewer viewer, Object e1, Object e2) {

		//For now this comparator applies only to Comment elements
		if (!(e1 instanceof R4EUIComment && e2 instanceof R4EUIComment)) {
			return 0;
		}

		final Date firstDate = ((R4EUIComment) e1).getComment().getCreatedOn();
		final Date secondDate = ((R4EUIComment) e2).getComment().getCreatedOn();

		//Compare dates
		if (firstDate.before(secondDate)) {
			return -1;
		}
		if (firstDate.after(secondDate)) {
			return 1;
		}
		return 0;
	}
}