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Java > Open Source Codes > org > jboss > deployers > spi > OrderedDeployer


1 /*
2  * JBoss, Home of Professional Open Source
3  * Copyright 2006, Red Hat Middleware LLC, and individual contributors
4  * by the @authors tag. See the copyright.txt in the distribution for a
5  * full listing of individual contributors.
6  *
7  * This is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU Lesser General Public License as
9  * published by the Free Software Foundation; either version 2.1 of
10  * the License, or (at your option) any later version.
11  *
12  * This software is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
19  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22 package org.jboss.deployers.spi;
23
24 import java.util.Comparator JavaDoc;
25
26 /**
27  * A base interface for deployers that defines the ordering contract
28  * and comparator.
29  *
30  * @author Scott.Stark@jboss.org
31  * @version $Revision:$
32  */
33 public interface OrderedDeployer
34 {
35    /**
36     * Get the relative order
37     *
38     * @return the relative order
39     */
40    int getRelativeOrder();
41    /**
42     * Set the deployer relative order.
43     * @param order - the order of the deployer in a deployer chain.
44     */
45    public void setRelativeOrder(int order);
46
47    /** The comparator for relative ordering of deployers */
48    Comparator JavaDoc<OrderedDeployer> COMPARATOR = new DeployerComparator();
49    
50    /**
51     * The comparator for relative ordering of deployers
52     */
53    public class DeployerComparator implements Comparator JavaDoc<OrderedDeployer>
54    {
55       public int compare(OrderedDeployer o1, OrderedDeployer o2)
56       {
57          int relative = o1.getRelativeOrder() - o2.getRelativeOrder();
58          if (relative != 0)
59             return relative;
60          return o1.toString().compareTo(o2.toString());
61       }
62    }
63
64 }
65
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