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    1   package org.apache.turbine.util;
    2
    3
    4   /*
    5    * Licensed to the Apache Software Foundation (ASF) under one
    6    * or more contributor license agreements.  See the NOTICE file
    7    * distributed with this work for additional information
    8    * regarding copyright ownership.  The ASF licenses this file
    9    * to you under the Apache License, Version 2.0 (the
    10   * "License"); you may not use this file except in compliance
    11   * with the License.  You may obtain a copy of the License at
    12   *
    13   *   http://www.apache.org/licenses/LICENSE-2.0
    14   *
    15   * Unless required by applicable law or agreed to in writing,
    16   * software distributed under the License is distributed on an
    17   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    18   * KIND, either express or implied.  See the License for the
    19   * specific language governing permissions and limitations
    20   * under the License.
    21   */
    22
    23
    24  /**
    25   * The base class of all exceptions thrown by Turbine.
    26   *
    27   * It is intended to ease the debugging by carrying on the information
    28   * about the exception which was caught and provoked throwing the
    29   * current exception. Catching and rethrowing may occur multiple
    30   * times, and provided that all exceptions except the first one
    31   * are descendands of <code>TurbineException</code>, when the
    32   * exception is finally printed out using any of the <code>
    33   * printStackTrace()</code> methods, the stacktrace will contain
    34   * the information about all exceptions thrown and caught on
    35   * the way.
    36   * <p> Running the following program
    37   * <p><pre>
    38   *  1 import org.apache.turbine.util.TurbineException;
    39   *  2
    40   *  3 public class Test {
    41   *  4     public static void main( String[] args ) {
    42   *  5         try {
    43   *  6             a();
    44   *  7         } catch(Exception e) {
    45   *  8             e.printStackTrace();
    46   *  9         }
    47   * 10      }
    48   * 11
    49   * 12      public static void a() throws TurbineException {
    50   * 13          try {
    51   * 14              b();
    52   * 15          } catch(Exception e) {
    53   * 16              throw new TurbineException("foo", e);
    54   * 17          }
    55   * 18      }
    56   * 19
    57   * 20      public static void b() throws TurbineException {
    58   * 21          try {
    59   * 22              c();
    60   * 23          } catch(Exception e) {
    61   * 24              throw new TurbineException("bar", e);
    62   * 25          }
    63   * 26      }
    64   * 27
    65   * 28      public static void c() throws TurbineException {
    66   * 29          throw new Exception("baz");
    67   * 30      }
    68   * 31 }
    69   * </pre>
    70   * <p>Yields the following stacktrace:
    71   * <p><pre>
    72   * java.lang.Exception: baz: bar: foo
    73   *    at Test.c(Test.java:29)
    74   *    at Test.b(Test.java:22)
    75   * rethrown as TurbineException: bar
    76   *    at Test.b(Test.java:24)
    77   *    at Test.a(Test.java:14)
    78   * rethrown as TurbineException: foo
    79   *    at Test.a(Test.java:16)
    80   *    at Test.main(Test.java:6)
    81   * </pre><br>
    82   *
    83   * @author <a href="mailto:Rafal.Krzewski@e-point.pl">Rafal Krzewski</a>
    84   * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
    85   * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
    86   */
    87  public class TurbineException extends Exception
    88  {
    89      /** Serial version */
    90      private static final long serialVersionUID = 6287570348053189763L;
    91
    92      /**
    93       * Constructs a new <code>TurbineException</code> without specified
    94       * detail message.
    95       */
    96      public TurbineException()
    97      {
    98          super();
    99      }
    100
    101     /**
    102      * Constructs a new <code>TurbineException</code> with specified
    103      * detail message.
    104      *
    105      * @param msg The error message.
    106      */
    107     public TurbineException(String msg)
    108     {
    109         super(msg);
    110     }
    111
    112     /**
    113      * Constructs a new <code>TurbineException</code> with specified
    114      * nested <code>Throwable</code>.
    115      *
    116      * @param nested The exception or error that caused this exception
    117      *               to be thrown.
    118      */
    119     public TurbineException(Throwable nested)
    120     {
    121         super(nested);
    122     }
    123
    124     /**
    125      * Constructs a new <code>TurbineException</code> with specified
    126      * detail message and nested <code>Throwable</code>.
    127      *
    128      * @param msg    The error message.
    129      * @param nested The exception or error that caused this exception
    130      *               to be thrown.
    131      */
    132     public TurbineException(String msg, Throwable nested)
    133     {
    134         super(msg, nested);
    135     }
    136 }