1 /**
2 * Copyright 2008 Atlassian Pty Ltd
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 com.atlassian.util.concurrent;
18
19 /**
20 * Design by contract assertions.
21 */
22 public class Assertions {
23 public static <T> T notNull(final String name, final T notNull) throws IllegalArgumentException {
24 if (notNull == null) {
25 throw new NullArgumentException(name);
26 }
27 return notNull;
28 }
29
30 public static void isTrue(final String name, final boolean check) throws IllegalArgumentException {
31 if (!check) {
32 throw new IllegalArgumentException(name);
33 }
34 }
35
36 private Assertions() {}
37
38 static class NullArgumentException extends IllegalArgumentException {
39 private static final long serialVersionUID = 6178592463723624585L;
40
41 NullArgumentException(final String name) {
42 super(name + " should not be null!");
43 }
44 }
45 }