/*
 * Copyright (C) 2010 Teleal GmbH, Switzerland
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.teleal.common.util;

/**
 * @author Christian Bauer
 */
public class Exceptions {

    public static Throwable unwrap(Throwable throwable) throws IllegalArgumentException {
        if (throwable == null) {
            throw new IllegalArgumentException("Cannot unwrap null throwable");
        }
        for (Throwable current = throwable; current != null; current = current.getCause()) {
            throwable = current;
        }
        return throwable;
    }
}
