awips2/edexOsgi/com.raytheon.uf.common.util/src/com/raytheon/uf/common/util/ExceptionUtil.java

/**
 * This software was developed and / or modified by Raytheon Company,
 * pursuant to Contract DG133W-05-CQ-1067 with the US Government.
 * 
 * U.S. EXPORT CONTROLLED TECHNICAL DATA
 * This software product contains export-restricted data whose
 * export/transfer/disclosure is restricted by U.S. law. Dissemination
 * to non-U.S. persons whether in the United States or abroad requires
 * an export license or other authorization.
 * 
 * Contractor Name:        Raytheon Company
 * Contractor Address:     6825 Pine Street, Suite 340
 *                         Mail Stop B8
 *                         Omaha, NE 68106
 *                         402.291.0100
 * 
 * See the AWIPS II Master Rights File ("Master Rights File.pdf") for
 * further licensing information.
 **/
package com.raytheon.uf.common.util;

/**
 * Utilities for working with {@link Exception}s.
 * 
 * <pre>
 * 
 * SOFTWARE HISTORY
 * 
 * Date         Ticket#    Engineer    Description
 * ------------ ---------- ----------- --------------------------
 * Jul 5, 2012  740        djohnson     Initial creation
 * 
 * </pre>
 * 
 * @author djohnson
 * @version 1.0
 */

public final class ExceptionUtil {

    private ExceptionUtil() {
    }

    /**
     * Retrieve the root cause of a {@link Throwable} chain.
     * 
     * @param t
     *            the throwable
     * @return the root cause
     */
    public static Throwable getRootCause(Throwable t) {
        Throwable result = t;

        while (result.getCause() != null) {
            result = result.getCause();
        }

        return result;
    }

}