001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     * 
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     * 
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */ 
017    
018    package org.apache.commons.logging;
019    
020    
021    /**
022     * <p>An exception that is thrown only if a suitable <code>LogFactory</code>
023     * or <code>Log</code> instance cannot be created by the corresponding
024     * factory methods.</p>
025     *
026     * @author Craig R. McClanahan
027     * @version $Revision: 424107 $ $Date: 2006-07-21 01:15:42 +0200 (fr, 21 jul 2006) $
028     */
029    
030    public class LogConfigurationException extends RuntimeException {
031    
032    
033        /**
034         * Construct a new exception with <code>null</code> as its detail message.
035         */
036        public LogConfigurationException() {
037    
038            super();
039    
040        }
041    
042    
043        /**
044         * Construct a new exception with the specified detail message.
045         *
046         * @param message The detail message
047         */
048        public LogConfigurationException(String message) {
049    
050            super(message);
051    
052        }
053    
054    
055        /**
056         * Construct a new exception with the specified cause and a derived
057         * detail message.
058         *
059         * @param cause The underlying cause
060         */
061        public LogConfigurationException(Throwable cause) {
062    
063            this((cause == null) ? null : cause.toString(), cause);
064    
065        }
066    
067    
068        /**
069         * Construct a new exception with the specified detail message and cause.
070         *
071         * @param message The detail message
072         * @param cause The underlying cause
073         */
074        public LogConfigurationException(String message, Throwable cause) {
075    
076            super(message + " (Caused by " + cause + ")");
077            this.cause = cause; // Two-argument version requires JDK 1.4 or later
078    
079        }
080    
081    
082        /**
083         * The underlying cause of this exception.
084         */
085        protected Throwable cause = null;
086    
087    
088        /**
089         * Return the underlying cause of this exception (if any).
090         */
091        public Throwable getCause() {
092    
093            return (this.cause);
094    
095        }
096    
097    
098    }