1 /*
2 * Copyright 2014 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * You may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.codehaus.gmavenplus.util;
18
19 import java.security.Permission;
20
21
22 /**
23 * Custom security manager to {@link System#exit} (and related) from being used.
24 *
25 * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
26 * @since 1.2
27 */
28 public class NoExitSecurityManager extends SecurityManager {
29
30 /**
31 * The parent SecurityManager.
32 */
33 private final SecurityManager parent;
34
35 /**
36 * Construct a new NoExitSecurityManager from the parent.
37 *
38 * @param newParent the parent to set
39 */
40 public NoExitSecurityManager(final SecurityManager newParent) {
41 parent = newParent;
42 }
43
44 /**
45 * Construct a new NoExitSecurityManager, using the System SecurityManager as the parent.
46 */
47 public NoExitSecurityManager() {
48 this(System.getSecurityManager());
49 }
50
51 /**
52 * Check the given Permission.
53 *
54 * @param permission the Permission to check
55 */
56 public void checkPermission(final Permission permission) {
57 if (parent != null) {
58 parent.checkPermission(permission);
59 }
60 }
61
62 /**
63 * Always throws {@link SecurityException}.
64 *
65 * @param code the exit code that is completely ignored
66 */
67 public void checkExit(final int code) {
68 throw new SecurityException("Use of System.exit() is forbidden!");
69 }
70
71 }