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.maven.internal.impl;
20
21 class Utils {
22 static <T> T nonNull(T t) {
23 if (t == null) {
24 throw new IllegalArgumentException();
25 }
26 return t;
27 }
28
29 static <T> T nonNull(T t, String message) {
30 if (t == null) {
31 throw new IllegalArgumentException(message);
32 }
33 return t;
34 }
35
36 static <T> T cast(Class<T> clazz, Object o, String message) {
37 if (!clazz.isInstance(o)) {
38 throw new IllegalArgumentException(message);
39 }
40 return clazz.cast(o);
41 }
42 }