| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.lang; |
| |
| /** |
| * <p>Thrown to indicate that an argument was <code>null</code> and should |
| * not have been. |
| * This exception supplements the standard <code>IllegalArgumentException</code> |
| * by providing a more semantically rich description of the problem.</p> |
| * |
| * <p><code>NullArgumentException</code> represents the case where a method takes |
| * in a parameter that must not be <code>null</code>. |
| * Some coding standards would use <code>NullPointerException</code> for this case, |
| * others will use <code>IllegalArgumentException</code>. |
| * Thus this exception would be used in place of |
| * <code>IllegalArgumentException</code>, yet it still extends it.</p> |
| * |
| * <pre> |
| * public void foo(String str) { |
| * if (str == null) { |
| * throw new NullArgumentException("str"); |
| * } |
| * // do something with the string |
| * } |
| * </pre> |
| * |
| * @author Apache Software Foundation |
| * @author Matthew Hawthorne |
| * @since 2.0 |
| * @version $Id$ |
| */ |
| public class NullArgumentException extends IllegalArgumentException { |
| |
| /** |
| * Required for serialization support. |
| * |
| * @see java.io.Serializable |
| */ |
| private static final long serialVersionUID = 1174360235354917591L; |
| |
| /** |
| * <p>Instantiates with the given argument name.</p> |
| * |
| * @param argName the name of the argument that was <code>null</code>. |
| */ |
| public NullArgumentException(String argName) { |
| super((argName == null ? "Argument" : argName) + " must not be null."); |
| } |
| |
| } |