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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.csv;
19  
20  import java.util.Objects;
21  
22  /**
23   * Utility class for input parameter validation.
24   *
25   * TODO Replace usage with {@link Objects} when we switch to Java 7.
26   */
27  final class Assertions {
28  
29      private Assertions() {
30          // can not be instantiated
31      }
32  
33      public static void notNull(final Object parameter, final String parameterName) {
34          if (parameter == null) {
35              throw new IllegalArgumentException("Parameter '" + parameterName + "' must not be null!");
36          }
37      }
38  }