/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.log4j.config;

/**
 * Thrown when an error is encountered whilst attempting to set a property using
 * the {@link PropertySetter} utility class.
 * 
 * @author Anders Kristensen
 * @since 1.1
 */
public class PropertySetterException extends Exception {
    private static final long serialVersionUID = -1352613734254235861L;
    protected Throwable rootCause;

    public PropertySetterException(String msg) {
	super(msg);
    }

    public PropertySetterException(Throwable rootCause) {
	super();
	this.rootCause = rootCause;
    }

    /**
     * Returns descriptive text on the cause of this exception.
     */
    public String getMessage() {
	String msg = super.getMessage();
	if (msg == null && rootCause != null) {
	    msg = rootCause.getMessage();
	}
	return msg;
    }
}
