com.toedter.e4.demo.contacts.swt.views.ContactViewerComparator.java Source code

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Here is the source code for com.toedter.e4.demo.contacts.swt.views.ContactViewerComparator.java

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/*******************************************************************************
 * Copyright (c) 2011 Kai Toedter 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:
 *     Kai Toedter - initial API and implementation
 ******************************************************************************/

package com.toedter.e4.demo.contacts.swt.views;

import com.toedter.e4.demo.contacts.generic.model.Contact;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;

class ContactViewerComparator extends ViewerComparator {

    @Override
    public int compare(final Viewer viewer, final Object obj1, final Object obj2) {

        if (obj1 instanceof Contact && obj2 instanceof Contact) {
            String lastName1 = ((Contact) obj1).getLastName();
            String lastName2 = ((Contact) obj2).getLastName();
            if (lastName1 == null) {
                lastName1 = "";
            }
            if (lastName2 == null) {
                lastName2 = "";
            }
            return lastName1.compareTo(lastName2);
        } else {
            throw new IllegalArgumentException("Can only compare two Contacts.");
        }

    }
}