The Tor Browser: mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/ExceptionUtils.java@fc2d59ddac77

     1 /*

     2  * ====================================================================

     3  * Licensed to the Apache Software Foundation (ASF) under one

     4  * or more contributor license agreements.  See the NOTICE file

     5  * distributed with this work for additional information

     6  * regarding copyright ownership.  The ASF licenses this file

     7  * to you under the Apache License, Version 2.0 (the

     8  * "License"); you may not use this file except in compliance

     9  * with the License.  You may obtain a copy of the License at

    10  *

    11  *   http://www.apache.org/licenses/LICENSE-2.0

    12  *

    13  * Unless required by applicable law or agreed to in writing,

    14  * software distributed under the License is distributed on an

    15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

    16  * KIND, either express or implied.  See the License for the

    17  * specific language governing permissions and limitations

    18  * under the License.

    19  * ====================================================================

    20  *

    21  * This software consists of voluntary contributions made by many

    22  * individuals on behalf of the Apache Software Foundation.  For more

    23  * information on the Apache Software Foundation, please see

    24  * <http://www.apache.org/>.

    25  *

    26  */

    27 package ch.boye.httpclientandroidlib.util;

    29 import java.lang.reflect.Method;

    31 /**

    32  * The home for utility methods that handle various exception-related tasks.

    33  *

    34  *

    35  * @since 4.0

    36  */

    37 public final class ExceptionUtils {

    39     /** A reference to Throwable's initCause method, or null if it's not there in this JVM */

    40     static private final Method INIT_CAUSE_METHOD = getInitCauseMethod();

    42     /**

    43      * Returns a <code>Method<code> allowing access to

    44      * {@link Throwable#initCause(Throwable) initCause} method of {@link Throwable},

    45      * or <code>null</code> if the method

    46      * does not exist.

    47      *

    48      * @return A <code>Method<code> for <code>Throwable.initCause</code>, or

    49      * <code>null</code> if unavailable.

    50      */

    51     static private Method getInitCauseMethod() {

    52         try {

    53             Class[] paramsClasses = new Class[] { Throwable.class };

    54             return Throwable.class.getMethod("initCause", paramsClasses);

    55         } catch (NoSuchMethodException e) {

    56             return null;

    57         }

    58     }

    60     /**

    61      * If we're running on JDK 1.4 or later, initialize the cause for the given throwable.

    62      *

    63      * @param  throwable The throwable.

    64      * @param  cause     The cause of the throwable.

    65      */

    66     public static void initCause(Throwable throwable, Throwable cause) {

    67         if (INIT_CAUSE_METHOD != null) {

    68             try {

    69                 INIT_CAUSE_METHOD.invoke(throwable, new Object[] { cause });

    70             } catch (Exception e) {

    71                 // Well, with no logging, the only option is to munch the exception

    72             }

    73         }

    74     }

    76     private ExceptionUtils() {

    77     }

    79 }

The Tor Browser / file revision