1 | /* |
2 | * $Id: ComClassPathBuilder.java,v 1.3 2006/02/01 18:54:35 adamp Exp $ |
3 | * |
4 | * (c) Copyright, Moebius Solutions, Inc., 2004 |
5 | * |
6 | * All Rights Reserved |
7 | * |
8 | * This material may be reproduced by or for the U. S. Government |
9 | * pursuant to the copyright license under the clause at |
10 | * DFARS 252.227-7014 (OCT 2001). |
11 | */ |
12 | package com.moesol.bindings.platform_sdk.component_services; |
13 | |
14 | import java.io.File; |
15 | import java.net.MalformedURLException; |
16 | import java.net.URL; |
17 | import java.util.SortedMap; |
18 | import java.util.TreeMap; |
19 | import java.util.logging.Level; |
20 | import java.util.logging.Logger; |
21 | import java.util.prefs.BackingStoreException; |
22 | import java.util.prefs.Preferences; |
23 | |
24 | /** |
25 | * Build a class path array suitable for URLClassLoader from the system |
26 | * preferences and user preferences. If a component is installed only for the |
27 | * current user then these classpath values will only be in the user |
28 | * preferences, otherwise they will be in the system preferences. Here, we |
29 | * search both. |
30 | * |
31 | * @author Hastings |
32 | */ |
33 | public class ComClassPathBuilder { |
34 | private final Preferences m_sys; |
35 | private final Preferences m_user; |
36 | |
37 | private static Logger s_logger = Logger.getLogger(ComClassPathBuilder.class.getName()); |
38 | |
39 | public ComClassPathBuilder(String group_name) { |
40 | m_sys = systemNodeForGroup(group_name); |
41 | m_user = userNodeForGroup(group_name); |
42 | } |
43 | |
44 | public static Preferences systemNodeForGroup(String group_name) { |
45 | Preferences sys = Preferences.systemNodeForPackage(COM.class); |
46 | return findNode(sys, group_name); |
47 | } |
48 | |
49 | public static Preferences userNodeForGroup(String group_name) { |
50 | Preferences sys = Preferences.userNodeForPackage(COM.class); |
51 | return findNode(sys, group_name); |
52 | } |
53 | |
54 | private static Preferences findNode(Preferences pkg_root, String group_name) { |
55 | Preferences in_proc = pkg_root.node("com_inproc_groups"); |
56 | Preferences group = in_proc.node(group_name); |
57 | Preferences classpath = group.node("classpath"); |
58 | return classpath; |
59 | } |
60 | |
61 | public URL[] buildClassPath() throws BackingStoreException, MalformedURLException { |
62 | SortedMap map = new TreeMap(); |
63 | addPaths(map, m_sys); |
64 | addPaths(map, m_user); |
65 | return (URL[])map.values().toArray(new URL[0]); |
66 | } |
67 | |
68 | private void addPaths(SortedMap map, Preferences node) throws BackingStoreException, MalformedURLException { |
69 | String[] keys = node.keys(); |
70 | for (int i = 0; i < keys.length; i++) { |
71 | if (s_logger.isLoggable(Level.FINE)) { |
72 | s_logger.log(Level.FINE, "Adding Path: " + keys[i] + " value: " + node.get(keys[i], null)); |
73 | } |
74 | File f = new File(node.get(keys[i], null)); |
75 | URL url = f.toURL(); |
76 | map.put(keys[i], url); |
77 | } |
78 | } |
79 | } |