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    package org.apache.log4j.config;
018    
019    /**
020     * Thrown when an error is encountered whilst attempting to set a property
021     * using the {@link PropertySetter} utility class.
022     *
023     * @since 1.1
024     */
025    public class PropertySetterException extends Exception {
026        private static final long serialVersionUID = -1352613734254235861L;
027        protected Throwable rootCause;
028    
029        public PropertySetterException(String msg) {
030            super(msg);
031        }
032    
033        public PropertySetterException(Throwable rootCause) {
034            super();
035            this.rootCause = rootCause;
036        }
037    
038        /**
039         * Returns descriptive text on the cause of this exception.
040         */
041        public String getMessage() {
042            String msg = super.getMessage();
043            if (msg == null && rootCause != null) {
044                msg = rootCause.getMessage();
045            }
046            return msg;
047        }
048    }