Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.util;
020
021/**
022 * Utility class to deal with Exceptions.
023 */
024public final class Exceptions {
025  private Exceptions() {
026  }
027
028  /**
029   * Walks the .getCause() chain till it hits the leaf node.
030   *
031   * @param throwable a throwable object
032   * @return the most inner cause
033   */
034  public static Throwable getUltimateCause(final Throwable throwable) {
035    if (throwable.getCause() == null) {
036      return throwable;
037    } else {
038      return getUltimateCause(throwable.getCause());
039    }
040  }
041
042}