Moving IllegalClassException to backcompat

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@796067 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Henri Yandell 2009-07-20 23:41:01 +00:00
parent 13ad49b575
commit 4af0d359b4
1 changed files with 0 additions and 103 deletions

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/*
* 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 when an object is an instance of an unexpected type (a class or interface).
* This exception supplements the standard <code>IllegalArgumentException</code>
* by providing a more semantically rich description of the problem.</p>
*
* <p><code>IllegalClassException</code> represents the case where a method takes
* in a genericly typed parameter like Object (typically because it has to due to some
* other interface it implements), but this implementation only actually accepts a specific
* type, for example String. This exception would be used in place of
* <code>IllegalArgumentException</code>, yet it still extends it.</p>
*
* <pre>
* public void foo(Object obj) {
* if (obj instanceof String == false) {
* throw new IllegalClassException(String.class, obj);
* }
* // do something with the string
* }
* </pre>
*
* @author Matthew Hawthorne
* @author Gary Gregory
* @author Stephen Colebourne
* @since 2.0
* @version $Id$
*/
public class IllegalClassException extends IllegalArgumentException {
/**
* Required for serialization support.
*
* @see java.io.Serializable
*/
private static final long serialVersionUID = 8063272569377254819L;
/**
* <p>Instantiates with the expected type, and actual object.</p>
*
* @param expected the expected type
* @param actual the actual object
* @since 2.1
*/
public IllegalClassException(Class<?> expected, Object actual) {
super(
"Expected: "
+ safeGetClassName(expected)
+ ", actual: "
+ (actual == null ? "null" : actual.getClass().getName()));
}
/**
* <p>Instantiates with the expected and actual types.</p>
*
* @param expected the expected type
* @param actual the actual type
*/
public IllegalClassException(Class<?> expected, Class<?> actual) {
super(
"Expected: "
+ safeGetClassName(expected)
+ ", actual: "
+ safeGetClassName(actual));
}
/**
* <p>Instantiates with the specified message.</p>
*
* @param message the exception message
*/
public IllegalClassException(String message) {
super(message);
}
/**
* <p>Returns the class name or <code>null</code> if the class is
* <code>null</code>.</p>
*
* @param cls a <code>Class</code>
* @return the name of <code>cls</code>, or <code>null</code> if if <code>cls</code> is <code>null</code>.
*/
private static final String safeGetClassName(Class<?> cls) {
return cls == null ? null : cls.getName();
}
}