    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
    028        /**
    029         * The root cause.
    030         */
    031        protected Throwable rootCause;
    032
    033        /**
    034         * Construct the exception with the given message.
    035         *
    036         * @param msg The message
    037         */
    038        public PropertySetterException(final String msg) {
    039            super(msg);
    040        }
    041
    042        /**
    043         * Construct the exception with the given root cause.
    044         *
    045         * @param rootCause The root cause
    046         */
    047        public PropertySetterException(final Throwable rootCause) {
    048            super();
    049            this.rootCause = rootCause;
    050        }
    051
    052        /**
    053         * Returns descriptive text on the cause of this exception.
    054         *
    055         * @return the descriptive text.
    056         */
    057        @Override
    058        public String getMessage() {
    059            String msg = super.getMessage();
    060            if (msg == null && rootCause != null) {
    061                msg = rootCause.getMessage();
    062            }
    063            return msg;
    064        }
    065    }