1 package org.apache.maven.surefire.util.internal;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 /**
23 * Similar to Java 7 java.util.Objects.
24 *
25 * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
26 * @since 2.20
27 */
28 public final class ObjectUtils
29 {
30 private ObjectUtils()
31 {
32 throw new IllegalStateException( "no instantiable constructor" );
33 }
34
35 public static <T> T useNonNull( T target, T fallback )
36 {
37 return isNull( target ) ? fallback : target;
38 }
39
40 /*
41 * In JDK7 use java.util.Objects instead.
42 * todo
43 * */
44 public static boolean isNull( Object target )
45 {
46 return target == null;
47 }
48
49 /*
50 * In JDK7 use java.util.Objects instead.
51 * todo
52 * */
53 public static boolean nonNull( Object target )
54 {
55 return !isNull( target );
56 }
57
58 /*
59 * In JDK7 use java.util.Objects instead.
60 * todo
61 * */
62 public static <T> T requireNonNull( T obj, String message )
63 {
64 if ( isNull( obj ) )
65 {
66 throw new NullPointerException( message );
67 }
68 return obj;
69 }
70
71 /*
72 * In JDK7 use java.util.Objects instead.
73 * todo
74 * */
75 public static <T> T requireNonNull( T obj )
76 {
77 return requireNonNull( obj, null );
78 }
79 }