/* 
    P/P   *  Method: net.sourceforge.pebble.util.ExceptionUtils__static_init
          */
     1  /*
     2   * Copyright (c) 2003-2006, Simon Brown
     3   * All rights reserved.
     4   *
     5   * Redistribution and use in source and binary forms, with or without
     6   * modification, are permitted provided that the following conditions are met:
     7   *
     8   *   - Redistributions of source code must retain the above copyright
     9   *     notice, this list of conditions and the following disclaimer.
    10   *
    11   *   - Redistributions in binary form must reproduce the above copyright
    12   *     notice, this list of conditions and the following disclaimer in
    13   *     the documentation and/or other materials provided with the
    14   *     distribution.
    15   *
    16   *   - Neither the name of Pebble nor the names of its contributors may
    17   *     be used to endorse or promote products derived from this software
    18   *     without specific prior written permission.
    19   *
    20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    30   * POSSIBILITY OF SUCH DAMAGE.
    31   */
    32  package net.sourceforge.pebble.util;
    33  
    34  import java.io.PrintWriter;
    35  import java.io.StringWriter;
    36  
    37  /**
    38   * A collection of utility methods for manipulating exceptions.
    39   *
    40   * @author    Simon Brown
    41   */
         /* 
    P/P   *  Method: void net.sourceforge.pebble.util.ExceptionUtils()
          */
    42  public final class ExceptionUtils {
    43  
    44    /**
    45     * Given a Throwable, this method returns a String representation of the
    46     * complete stack trace.
    47     *
    48     * @param t   the Throwable from which to extract the stack trace
    49     * @return  a String representation of the stack trace
    50     */
    51    public static String getStackTraceAsString(Throwable t) {
    52  
             /* 
    P/P       *  Method: String getStackTraceAsString(Throwable)
              * 
              *  Presumptions:
              *    java.io.StringWriter:getBuffer(...)@57 != null
              * 
              *  Postconditions:
              *    return_value != null
              * 
              *  Test Vectors:
              *    t: Addr_Set{null}, Inverse{null}
              */
    53      if (t != null) {
    54        StringWriter sw = new StringWriter();
    55        PrintWriter writer = new PrintWriter(sw);
    56        t.printStackTrace(writer);
    57        return sw.getBuffer().toString();
    58      } else {
    59        return "";
    60      }
    61    }
    62  
    63  }