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This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

// $Id: TypeThenNameOrder.java,v 1.9 2004/09/01 15:43:20 mvw Exp $
// Copyright (c) 1996-2001 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason.  IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package org.argouml.ui.explorer;

import javax.swing.tree.DefaultMutableTreeNode;

/**
 * Sorts by user object type,
 * diagrams first,
 * then packages,
 * then other types.
 *
 * sorts by name within type groups.
 *
 * @since 0.15.2, Created on 28 September 2003, 10:02
 *
 * @author  alexb
 */
public class TypeThenNameOrder extends NameOrder {
    
    /** Creates a new instance of TypeThenNameOrder */
    public TypeThenNameOrder() {
    }

    /**
     * Compares obj1 and obj2 as per the class description.
     * nulls are sorted first.
     * Returns a negative integer, zero, or a positive integer as the first
     * argument is less than, equal to, or greater than the second.
     *
     * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
     */
    public int compare(Object obj1, Object obj2) {
	if (obj1 instanceof DefaultMutableTreeNode) {
	    DefaultMutableTreeNode node = (DefaultMutableTreeNode) obj1;
	    obj1 = node.getUserObject();
	}

	if (obj2 instanceof DefaultMutableTreeNode) {
	    DefaultMutableTreeNode node = (DefaultMutableTreeNode) obj2;
	    obj2 = node.getUserObject();
	}

	if (obj1 == null) {
	    if (obj2 == null)
		return 0;
	    return -1;
	} else if (obj2 == null) {
	    return 1;
	}

        String typeName = obj1.getClass().getName();
        String typeName1 = obj2.getClass().getName();

        // all diagram types treated equally, see issue 2260
	// if (typeName.indexOf("Diagram") != -1
	//     && typeName1.indexOf("Diagram") != -1)
	//     return compareUserObjects(obj1, obj2);

        int typeNameOrder = typeName.compareTo(typeName1);
        if (typeNameOrder == 0)
            return compareUserObjects(obj1, obj2);

        if (typeName.indexOf("Diagram") == -1
	    && typeName1.indexOf("Diagram") != -1)
            return 1;

        if (typeName.indexOf("Diagram") != -1
	    && typeName1.indexOf("Diagram") == -1)
            return -1;

        if (typeName.indexOf("Package") == -1
	    && typeName1.indexOf("Package") != -1)
            return 1;

        if (typeName.indexOf("Package") != -1
	    && typeName1.indexOf("Package") == -1)
            return -1;

        return typeNameOrder;
    }
    
    /**
     * @see java.lang.Object#toString()
     */
    public String toString() {
        return "Order By Type, Name";
    }
}
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