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mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/ExceptionUtils.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/ExceptionUtils.java

Wed, 31 Dec 2014 07:22:50 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 07:22:50 +0100

branch

TOR_BUG_3246

changeset 4

fc2d59ddac77

permissions

-rw-r--r--

Correct previous dual key logic pending first delivery installment.

michael@0	1	/*
michael@0	2	* ====================================================================
michael@0	3	* Licensed to the Apache Software Foundation (ASF) under one
michael@0	4	* or more contributor license agreements. See the NOTICE file
michael@0	5	* distributed with this work for additional information
michael@0	6	* regarding copyright ownership. The ASF licenses this file
michael@0	7	* to you under the Apache License, Version 2.0 (the
michael@0	8	* "License"); you may not use this file except in compliance
michael@0	9	* with the License. You may obtain a copy of the License at
michael@0	10	*
michael@0	11	* http://www.apache.org/licenses/LICENSE-2.0
michael@0	12	*
michael@0	13	* Unless required by applicable law or agreed to in writing,
michael@0	14	* software distributed under the License is distributed on an
michael@0	15	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
michael@0	16	* KIND, either express or implied. See the License for the
michael@0	17	* specific language governing permissions and limitations
michael@0	18	* under the License.
michael@0	19	* ====================================================================
michael@0	20	*
michael@0	21	* This software consists of voluntary contributions made by many
michael@0	22	* individuals on behalf of the Apache Software Foundation. For more
michael@0	23	* information on the Apache Software Foundation, please see
michael@0	24	* <http://www.apache.org/>.
michael@0	25	*
michael@0	26	*/
michael@0	27	package ch.boye.httpclientandroidlib.util;
michael@0	28
michael@0	29	import java.lang.reflect.Method;
michael@0	30
michael@0	31	/**
michael@0	32	* The home for utility methods that handle various exception-related tasks.
michael@0	33	*
michael@0	34	*
michael@0	35	* @since 4.0
michael@0	36	*/
michael@0	37	public final class ExceptionUtils {
michael@0	38
michael@0	39	/** A reference to Throwable's initCause method, or null if it's not there in this JVM */
michael@0	40	static private final Method INIT_CAUSE_METHOD = getInitCauseMethod();
michael@0	41
michael@0	42	/**
michael@0	43	* Returns a <code>Method<code> allowing access to
michael@0	44	* {@link Throwable#initCause(Throwable) initCause} method of {@link Throwable},
michael@0	45	* or <code>null</code> if the method
michael@0	46	* does not exist.
michael@0	47	*
michael@0	48	* @return A <code>Method<code> for <code>Throwable.initCause</code>, or
michael@0	49	* <code>null</code> if unavailable.
michael@0	50	*/
michael@0	51	static private Method getInitCauseMethod() {
michael@0	52	try {
michael@0	53	Class[] paramsClasses = new Class[] { Throwable.class };
michael@0	54	return Throwable.class.getMethod("initCause", paramsClasses);
michael@0	55	} catch (NoSuchMethodException e) {
michael@0	56	return null;
michael@0	57	}
michael@0	58	}
michael@0	59
michael@0	60	/**
michael@0	61	* If we're running on JDK 1.4 or later, initialize the cause for the given throwable.
michael@0	62	*
michael@0	63	* @param throwable The throwable.
michael@0	64	* @param cause The cause of the throwable.
michael@0	65	*/
michael@0	66	public static void initCause(Throwable throwable, Throwable cause) {
michael@0	67	if (INIT_CAUSE_METHOD != null) {
michael@0	68	try {
michael@0	69	INIT_CAUSE_METHOD.invoke(throwable, new Object[] { cause });
michael@0	70	} catch (Exception e) {
michael@0	71	// Well, with no logging, the only option is to munch the exception
michael@0	72	}
michael@0	73	}
michael@0	74	}
michael@0	75
michael@0	76	private ExceptionUtils() {
michael@0	77	}
michael@0	78
michael@0	79	}