libjava/classpath/gnu/javax/crypto/key/KeyAgreementException.java

   1 /* KeyAgreementException.java --
   2    Copyright (C) 2003, 2006 Free Software Foundation, Inc.
   3
   4 This file is a part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or (at
   9 your option) any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
  19 USA
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version.  */
  37
  38
  39 package gnu.javax.crypto.key;
  40
  41 import gnu.java.lang.CPStringBuilder;
  42
  43 import java.io.PrintStream;
  44 import java.io.PrintWriter;
  45 import java.io.Serializable;
  46 import java.security.KeyManagementException;
  47
  48 /**
  49  * A generic exception indicating that an unexpected condition has been detected
  50  * during the setup and/or processing of a key agreement protocol exchange.
  51  */
  52 public class KeyAgreementException
  53     extends KeyManagementException
  54     implements Serializable
  55 {
  56   /** @serial The possibly <code>null</code> <i>root</i> cause exception. */
  57   private Throwable cause = null;
  58
  59   /**
  60    * Constructs a new instance of <code>KeyAgreementException</code>. The
  61    * root exception and the detailed message are <code>null</code>.
  62    */
  63   public KeyAgreementException()
  64   {
  65     super();
  66   }
  67
  68   /**
  69    * Constructs a new instance of <code>KeyAgreementException</code> with a
  70    * detailed message. The <i>root</i> exception is <code>null</code>.
  71    *
  72    * @param detail a possibly <code>null</code> string containing details of
  73    *          the exception.
  74    * @see Throwable#getMessage()
  75    */
  76   public KeyAgreementException(String detail)
  77   {
  78     super(detail);
  79   }
  80
  81   /**
  82    * Constructs a new instance of <code>KeyAgreementException</code> with a
  83    * detailed message and a <i>root</i> exception.
  84    *
  85    * @param detail a possibly <code>null</code> string containing details of
  86    *          the exception.
  87    * @param cause a possibly <code>null</code> root exception that caused this
  88    *          exception.
  89    * @see Throwable#getMessage()
  90    * @see #getCause()
  91    */
  92   public KeyAgreementException(String detail, Throwable cause)
  93   {
  94     super(detail);
  95     this.cause = cause;
  96   }
  97
  98   /**
  99    * Returns the cause of this throwable or <code>null</code> if the cause is
 100    * nonexistent or unknown. The <i>cause</i> is the throwable that caused this
 101    * exception to be thrown.
 102    *
 103    * @return the possibly <code>null</code> exception that caused this one.
 104    */
 105   public Throwable getCause()
 106   {
 107     return cause;
 108   }
 109
 110   /**
 111    * Prints this exception's stack trace to <code>System.err</code>. If this
 112    * exception has a <i>root</i> exception; the stack trace of the <i>root</i>
 113    * exception is also printed to <code>System.err</code>.
 114    */
 115   public void printStackTrace()
 116   {
 117     super.printStackTrace();
 118     if (cause != null)
 119       cause.printStackTrace();
 120   }
 121
 122   /**
 123    * Prints this exception's stack trace to a print stream. If this exception
 124    * has a <i>root</i> exception; the stack trace of the <i>root</i> exception
 125    * is also printed to the print stream.
 126    *
 127    * @param ps the non-null print stream to which to print.
 128    */
 129   public void printStackTrace(PrintStream ps)
 130   {
 131     super.printStackTrace(ps);
 132     if (cause != null)
 133       cause.printStackTrace(ps);
 134   }
 135
 136   /**
 137    * Prints this exception's stack trace to a print writer. If this exception
 138    * has a <i>root</i> exception; the stack trace of the <i>root</i> exception
 139    * is also printed to the print writer.
 140    *
 141    * @param pw the non-null print writer to use for output.
 142    */
 143   public void printStackTrace(PrintWriter pw)
 144   {
 145     super.printStackTrace(pw);
 146     if (cause != null)
 147       cause.printStackTrace(pw);
 148   }
 149
 150   /**
 151    * Returns the string representation of this exception. The string
 152    * representation contains this exception's class name, its detailed messsage,
 153    * and if it has a <i>root</i> exception, the string representation of the
 154    * root exception. This string representation is meant for debugging and is
 155    * not meant to be interpreted programmatically.
 156    *
 157    * @return the non-null string representation of this exception.
 158    * @see Throwable#getMessage()
 159    */
 160   public String toString()
 161   {
 162     CPStringBuilder sb = new CPStringBuilder(this.getClass().getName()).append(": ")
 163         .append(super.toString());
 164     if (cause != null)
 165       sb.append("; caused by: ").append(cause.toString());
 166     return sb.toString();
 167   }
 168 }