pkiexception.java

一个完整的XACML工程,学习XACML技术的好例子!

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package issrg.pba.rbac;

/**
 * This class represents a PKI exception condition. It is thrown by the PKI
 * routines when they are used by the PBA API, and are simply propagated to the
 * caller.
 *
 * <p>Example:
 * <br><code>try{
 * <br>...
 * <br>}catch(PbaException pe){
 * <br>...
 * <br>}</code>
 *
 * <p>in this example the caller does not care if it was an error caused by
 * the PKI or not. It just performs some simple routine error-handling.
 *
 * <p>Example:
 * <br><code>try{
 * <br>...
 * <br>}catch(PkiException pe){
 * <br>... // PKI-specific error-handling here
 * <br>}catch(PbaException pe){
 * <br>...
 * <br>}</code>
 *
 * <p>however, in this example the caller distinguishes between PKI errors
 * and the other kinds of errors. It now can handle the PKI errors in a
 * different way.
 *
 * @author A Otenko
 * @author E Ball
 * @author D W Chadwick
 * @version 0.2
 */

public class PkiException extends issrg.pba.PbaException {
  /**
   * The default constructor builds an exception with no explanation
   * message and no embedded exception.
   */
  public PkiException(){
    super();
  }

  /**
   * This constructor builds an exception with a message but no
   * embedded exception.
   *
   * @param msg is the String message explaining the error; can be null
   */
  public PkiException(String msg){
    super(msg);
  }

  /**
   * This constructor builds an exception with a message and an
   * embedded exception to be returned by getEmbedded method.
   *
   * @param msg is the String explanation of the error; can be null
   * @param th is the Throwable object to be believed the cause of
   *    the error; can be null, if there is no embedded exception
   *
   * @see issrg.utils.EmbeddedException#getEmbedded()
   */
  public PkiException(String msg, Throwable th){
    super(msg, th);
  }
}