1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.onami.factoryannotation;
20
21 import java.security.AccessController;
22 import java.security.PrivilegedAction;
23
24 class PrivilegedHelper<T>
25 implements PrivilegedAction<T>
26 {
27
28 private final Class<T> clazz;
29
30 private final PrivilegedHelperCallback<T> callback;
31
32 public PrivilegedHelper( final Class<T> clazz, final PrivilegedHelperCallback<T> callback )
33 {
34
35 this.clazz = clazz;
36 this.callback = callback;
37 }
38
39 public T run()
40 {
41 return callback.execute( clazz );
42 }
43
44 public static final <T> T executePrivileged( final Class<T> clazz, final PrivilegedHelperCallback<T> callback )
45 {
46
47 return AccessController.doPrivileged( new PrivilegedHelper<T>( clazz, callback ) );
48 }
49
50 static interface PrivilegedHelperCallback<T>
51 {
52
53 T execute( Class<T> clazz );
54
55 }
56
57 }