001/*
002 * Copyright 2001-2004 The Apache Software Foundation.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.apache.commons.logging;
018
019/**
020 * <p>
021 * An exception that is thrown only if a suitable <code>LogFactory</code> or
022 * <code>Log</code> instance cannot be created by the corresponding factory
023 * methods.
024 * 
025 * 
026 * <p>
027 * In this version of JCL, this exception will never be thrown in practice.
028 * However, it is included here to ensure total compile time and run time
029 * compatibility with the original JCL 1.0.4.
030 * 
031 * @author Craig R. McClanahan
032 */
033
034public class LogConfigurationException extends RuntimeException {
035
036    private static final long serialVersionUID = 8486587136871052495L;
037
038    /**
039     * Construct a new exception with <code>null</code> as its detail message.
040     */
041    public LogConfigurationException() {
042        super();
043    }
044
045    /**
046     * Construct a new exception with the specified detail message.
047     * 
048     * @param message
049     *          The detail message
050     */
051    public LogConfigurationException(String message) {
052        super(message);
053    }
054
055    /**
056     * Construct a new exception with the specified cause and a derived detail
057     * message.
058     * 
059     * @param cause
060     *          The underlying cause
061     */
062    public LogConfigurationException(Throwable cause) {
063
064        this((cause == null) ? null : cause.toString(), cause);
065
066    }
067
068    /**
069     * Construct a new exception with the specified detail message and cause.
070     * 
071     * @param message
072     *          The detail message
073     * @param cause
074     *          The underlying cause
075     */
076    public LogConfigurationException(String message, Throwable cause) {
077        super(message + " (Caused by " + cause + ")");
078        this.cause = cause; // Two-argument version requires JDK 1.4 or later
079    }
080
081    /**
082     * The underlying cause of this exception.
083     */
084    protected Throwable cause = null;
085
086    /**
087     * Return the underlying cause of this exception (if any).
088     */
089    public Throwable getCause() {
090        return (this.cause);
091    }
092
093}