01: /*
02: *
03: *
04: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: */
26:
27: package com.sun.midp.services;
28:
29: import com.sun.midp.main.MIDletSuiteUtils;
30: import com.sun.midp.security.SecurityToken;
31: import com.sun.midp.security.Permissions;
32:
33: /**
34: * Keeps track of available services.
35: */
36: public abstract class SystemServiceManager {
37: private static SystemServiceManager instance = null;
38:
39: /**
40: * Gets class instance.
41: *
42: * @return SystemServiceManage class instance
43: */
44: synchronized public static SystemServiceManager getInstance(
45: SecurityToken token) {
46:
47: token.checkIfPermissionAllowed(Permissions.MIDP);
48:
49: if (instance == null) {
50: if (MIDletSuiteUtils.isAmsIsolate()) {
51: instance = new SystemServiceManagerImpl();
52: }
53: }
54:
55: return instance;
56: }
57:
58: /**
59: * Registers service.
60: *
61: * @param service service to register
62: */
63: abstract public void registerService(SystemService service);
64:
65: /**
66: * Gets registered service.
67: *
68: * @param serviceID unique service ID
69: * @return service corresponding to specified ID
70: */
71: abstract public SystemService getService(String serviceID);
72:
73: /**
74: * Shutdowns service manager
75: */
76: abstract public void shutdown();
77: }
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