1 /*
2 * XNap - A P2P framework and client.
3 *
4 * See the file AUTHORS for copyright information.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 package org.xnap.commons.pkg;
21
22 import java.util.Iterator;
23 import java.util.NoSuchElementException;
24
25 /***
26 */
27 public class UnsatisfiedDependencyNode extends AbstractDependencyNode
28 {
29
30 //--- Data Field(s) ---
31
32 //--- Constructor(s) ---
33
34 public UnsatisfiedDependencyNode(String token)
35 {
36 super(token);
37 }
38
39 //--- Method(s) ---
40
41 public void checkDepends(boolean requireInstalled)
42 throws UnsatisfiedDependenciesException
43 {
44 throw new UnsatisfiedDependenciesException(getID().toString());
45 }
46
47 public Iterator children()
48 {
49 return new EmptyIterator();
50 }
51
52 //--- Inner Class(es) ---
53
54 private class EmptyIterator implements Iterator
55 {
56 public EmptyIterator()
57 {
58 }
59
60 public boolean hasNext()
61 {
62 return false;
63 }
64
65 public Object next()
66 {
67 throw new NoSuchElementException();
68 }
69
70 public void remove()
71 {
72 throw new UnsupportedOperationException();
73 }
74
75 }
76
77 }
78