DependencyItem


1   /*
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4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
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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.dependency.spi;
23  
24  /**
25   * Information about a single dependency.
26   * 
27   * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
28   * @version $Revision: 37459 $
29   */
30  public interface DependencyItem 
31  {
32     /**
33      * Get the object name i depend on
34      * 
35      * @return the name
36      */
37     Object   getIDependOn();
38  
39     /**
40      * Get my object name
41      * 
42      * @return the name
43      */
44     Object   getName();
45  
46     /**
47      * Get when the dependency is required
48      * 
49      * @return the state when required
50      */
51     ControllerState getWhenRequired();
52  
53     /**
54      * Get the dependent's state
55      * 
56      * @return the state of the required of the dependent
57      */
58     ControllerState getDependentState();
59     
60     /**
61      * Whether we are resolved
62      * 
63      * @return true for resolved, false otherwise
64      */
65     boolean isResolved();
66  
67     /**
68      * Try to resolve
69      * 
70      * @param controller the controller
71      * @return true for resolved, false otherwise
72      */
73     boolean resolve(Controller controller);
74     
75     /**
76      * Mark the dependency as unresolved
77      * 
78      * @param controller the controller
79      */
80     void unresolved(Controller controller);
81  }
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