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/*
 * 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.commons.logging;

/**
 * An exception that is thrown only if a suitable LogFactory
 * or Log instance cannot be created by the corresponding
 * factory methods.
 *
 * @version $Id: LogConfigurationException.java 1432663 2013-01-13 17:24:18Z tn $
 */
public class LogConfigurationException extends RuntimeException {

    /** Serializable version identifier. */
    private static final long serialVersionUID = 8486587136871052495L;

    /**
     * Construct a new exception with null as its detail message.
     */
    public LogConfigurationException() {
        super();
    }

    /**
     * Construct a new exception with the specified detail message.
     *
     * @param message The detail message
     */
    public LogConfigurationException(String message) {
        super(message);
    }

    /**
     * Construct a new exception with the specified cause and a derived
     * detail message.
     *
     * @param cause The underlying cause
     */
    public LogConfigurationException(Throwable cause) {
        this(cause == null ? null : cause.toString(), cause);
    }

    /**
     * Construct a new exception with the specified detail message and cause.
     *
     * @param message The detail message
     * @param cause The underlying cause
     */
    public LogConfigurationException(String message, Throwable cause) {
        super(message + " (Caused by " + cause + ")");
        this.cause = cause; // Two-argument version requires JDK 1.4 or later
    }

    /**
     * The underlying cause of this exception.
     */
    protected Throwable cause = null;

    /**
     * Return the underlying cause of this exception (if any).
     */
    public Throwable getCause() {
        return this.cause;
    }
}