diff -r 000000000000 -r 6474c204b198 mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/ExceptionUtils.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/ExceptionUtils.java Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,79 @@ +/* + * ==================================================================== + * 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. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * . + * + */ +package ch.boye.httpclientandroidlib.util; + +import java.lang.reflect.Method; + +/** + * The home for utility methods that handle various exception-related tasks. + * + * + * @since 4.0 + */ +public final class ExceptionUtils { + + /** A reference to Throwable's initCause method, or null if it's not there in this JVM */ + static private final Method INIT_CAUSE_METHOD = getInitCauseMethod(); + + /** + * Returns a Method allowing access to + * {@link Throwable#initCause(Throwable) initCause} method of {@link Throwable}, + * or null if the method + * does not exist. + * + * @return A Method for Throwable.initCause, or + * null if unavailable. + */ + static private Method getInitCauseMethod() { + try { + Class[] paramsClasses = new Class[] { Throwable.class }; + return Throwable.class.getMethod("initCause", paramsClasses); + } catch (NoSuchMethodException e) { + return null; + } + } + + /** + * If we're running on JDK 1.4 or later, initialize the cause for the given throwable. + * + * @param throwable The throwable. + * @param cause The cause of the throwable. + */ + public static void initCause(Throwable throwable, Throwable cause) { + if (INIT_CAUSE_METHOD != null) { + try { + INIT_CAUSE_METHOD.invoke(throwable, new Object[] { cause }); + } catch (Exception e) { + // Well, with no logging, the only option is to munch the exception + } + } + } + + private ExceptionUtils() { + } + +}