Java tutorial
// Copyright 2008 The Apache Software Foundation // // Licensed 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. /** * Contains static methods useful for manipulating exceptions. */ public class ExceptionUtils { /** * Locates a particular type of exception, working its way via the cause property of each exception in the exception * stack. * * @param t the outermost exception * @param type the type of exception to search for * @return the first exception of the given type, if found, or null */ public static <T extends Throwable> T findCause(Throwable t, Class<T> type) { Throwable current = t; while (current != null) { if (type.isInstance(current)) return type.cast(current); // Not a match, work down. current = current.getCause(); } return null; } }