/* * Copyright 2001-2004 The Apache Software Foundation. *  * Licensed 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.logging;/** * <p>An exception that is thrown only if a suitable <code>LogFactory</code> * or <code>Log</code> instance cannot be created by the corresponding * factory methods.</p> * * @author Craig R. McClanahan * @version $Revision: 1.6 $ $Date: 2004/02/28 21:46:45 $ */public class LogConfigurationException extends RuntimeException {    /**     * Construct a new exception with <code>null</code> as its detail message.     */    public LogConfigurationException() {        super();    }    /**     * Construct a new exception with the specified detail message.     *     * @param message The detail message     */    public LogConfigurationException(String message) {        super(message);    }    /**     * Construct a new exception with the specified cause and a derived     * detail message.     *     * @param cause The underlying cause     */    public LogConfigurationException(Throwable cause) {        this((cause == null) ? null : cause.toString(), cause);    }    /**     * Construct a new exception with the specified detail message and cause.     *     * @param message The detail message     * @param cause The underlying cause     */    public LogConfigurationException(String message, Throwable cause) {        super(message + " (Caused by " + cause + ")");        this.cause = cause; // Two-argument version requires JDK 1.4 or later    }    /**     * The underlying cause of this exception.     */    protected Throwable cause = null;    /**     * Return the underlying cause of this exception (if any).     */    public Throwable getCause() {        return (this.cause);    }}