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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.poi.hpsf;

/**
 * This exception is the superclass of all other checked exceptions thrown
 * in this package. It supports a nested "reason" throwable, i.e. an exception
 * that caused this one to be thrown.
 */
public class HPSFException extends Exception
{

    /**
     * The underlying reason for this exception - may be
     * null.
     * */
    private Throwable reason;



    /**
     * Creates an {@link HPSFException}.
     */
    public HPSFException()
    {
        super();
    }



    /**
     * Creates an {@link HPSFException} with a message string.
     *
     * @param msg The message string.
     */
    public HPSFException(final String msg)
    {
        super(msg);
    }



    /**
     * Creates a new {@link HPSFException} with a reason.
     *
     * @param reason The reason, i.e. a throwable that indirectly
     * caused this exception.
     */
    public HPSFException(final Throwable reason)
    {
        super();
        this.reason = reason;
    }



    /**
     * Creates an {@link HPSFException} with a message string and a
     * reason.
     *
     * @param msg The message string.
     * @param reason The reason, i.e. a throwable that indirectly
     * caused this exception.
     */
    public HPSFException(final String msg, final Throwable reason)
    {
        super(msg);
        this.reason = reason;
    }



    /**
     * Returns the {@link Throwable} that caused this exception to
     * be thrown or null if there was no such {@link
     * Throwable}.
     *
     * @return The reason
     */
    public Throwable getReason()
    {
        return reason;
    }

}