utildelegateimpl.java

gcc的组建

    String p_useCodebaseOnly = System.getProperty("java.rmi.server.useCodebaseOnly");

    boolean useCodebaseOnly = p_useCodebaseOnly != null
      && p_useCodebaseOnly.trim().equalsIgnoreCase("true");

    try
      {
        if (remoteCodebase != null && !useCodebaseOnly)
          return RMIClassLoader.loadClass(remoteCodebase, className);
      }
    catch (Exception e)
      {
        // This failed but try others.
      }

    try
      {
        if (remoteCodebase == null || useCodebaseOnly)
          return RMIClassLoader.loadClass(remoteCodebase, className);
      }
    catch (Exception e)
      {
        // This failed but try others.
      }

    if (loader != null)
      return Class.forName(className, true, loader);

    throw new ClassNotFoundException(className + " at " + remoteCodebase);
  }

  /**
   * Converts CORBA {@link SystemException} into RMI {@link RemoteException}.
   * The exception is converted as defined in the following table:
   * <p>
   * <table border = "1">
   * <tr>
   * <th>CORBA Exception</th>
   * <th>RMI Exception</th>
   * </tr>
   * <tr>
   * <td>{@link COMM_FAILURE}</td>
   * <td>{@link MarshalException}</td>
   * </tr>
   * <tr>
   * <td>{@link INV_OBJREF}</td>
   * <td>{@link  NoSuchObjectException}</td>
   * </tr>
   * <tr>
   * <td>{@link NO_PERMISSION}</td>
   * <td>{@link  AccessException}</td>
   * </tr>
   * <tr>
   * <td>{@link MARSHAL}</td>
   * <td>{@link  MarshalException}</td>
   * </tr>
   * <tr>
   * <td>{@link BAD_PARAM} (all other cases)</td>
   * <td>{@link  MarshalException}</td>
   * </tr>
   * <tr>
   * <td>{@link OBJECT_NOT_EXIST}</td>
   * <td>{@link  NoSuchObjectException}</td>
   * </tr>
   * <tr>
   * <td>{@link TRANSACTION_REQUIRED}</td>
   * <td>{@link  TransactionRequiredException}</td>
   * </tr>
   * <tr>
   * <td>{@link TRANSACTION_ROLLEDBACK}</td>
   * <td>{@link  TransactionRolledbackException}</td>
   * </tr>
   * <tr>
   * <td>{@link INVALID_TRANSACTION}</td>
   * <td>{@link  InvalidTransactionException}</td>
   * </tr>
   * <tr>
   * <td bgcolor="lightgray">Any other {@link SystemException}</td>
   * <td bgcolor="lightgray">{@link RemoteException}</td>
   * </tr>
   * </table>
   * </p>
   * <p>
   * The exception detailed message always consists of
   * <ol>
   * <li>the string "CORBA "</li>
   * <li>the CORBA name of the system exception</li>
   * <li>single space</li>
   * <li>the hexadecimal value of the system exception's minor code, preceeded
   * by 0x (higher bits contain {@link OMGVMCID}).</li>
   * <li>single space</li>
   * <li>the {@link CompletionStatus} of the exception: "Yes", "No" or "Maybe".</li>
   * </ol>
   * <p>
   * For instance, if the Internet connection was refused:
   * </p>
   * <p>
   * <pre>
   * <code>CORBA COMM_FAILURE 0x535500C9 No</code>
   * </p>
   * <p>
   * The original CORBA exception is set as the cause of the RemoteException
   * being created.
   * </p>
   */
  public RemoteException mapSystemException(SystemException ex)
  {
    RemoteException rex;

    String status;

    switch (ex.completed.value())
      {
        case CompletionStatus._COMPLETED_MAYBE:
          status = "Maybe";
          break;

        case CompletionStatus._COMPLETED_NO:
          status = "No";
          break;

        case CompletionStatus._COMPLETED_YES:
          status = "Yes";
          break;

        default:
          status = "Unexpected completion status " + ex.completed.value();
      }

    String name = ex.getClass().getName();

    if (name.startsWith(m_StandardPackage))
      name = name.substring(m_StandardPackage.length());

    String message = "CORBA " + name + " 0x" + Integer.toHexString(ex.minor)
      + " " + status;

    if (ex instanceof COMM_FAILURE)
      rex = new MarshalException(message, ex);
    else if (ex instanceof INV_OBJREF)
      {
        rex = new NoSuchObjectException(message);
        rex.detail = ex;
      }
    else if (ex instanceof NO_PERMISSION)
      rex = new AccessException(message, ex);
    else if (ex instanceof MARSHAL)
      rex = new MarshalException(message, ex);
    else if (ex instanceof BAD_PARAM)
      rex = new MarshalException(message, ex);
    else if (ex instanceof OBJECT_NOT_EXIST)
      {
        rex = new NoSuchObjectException(message);
        rex.detail = ex;
      }
    else if (ex instanceof TRANSACTION_REQUIRED)
      {
        rex = new TransactionRequiredException(message);
        rex.detail = ex;
      }
    else if (ex instanceof TRANSACTION_ROLLEDBACK)
      {
        rex = new TransactionRolledbackException(message);
        rex.detail = ex;
      }
    else if (ex instanceof INVALID_TRANSACTION)
      {
        rex = new InvalidTransactionException(message);
        rex.detail = ex;
      }
    else if (ex instanceof UNKNOWN)
      rex = wrapException(ex.getCause());
    else
      rex = new RemoteException(message, ex);

    return rex;
  }

  /**
   * Converts the exception that was thrown by the implementation method on a
   * server side into RemoteException that can be transferred and re-thrown on a
   * client side. The method converts exceptions as defined in the following
   * table: <table border = "1">
   * <tr>
   * <th>Exception to map (or subclass)</th>
   * <th>Maps into</th>
   * </tr>
   * <tr>
   * <td>{@link Error}</td>
   * <td>{@link ServerError}</td>
   * </tr>
   * <tr>
   * <td>{@link RemoteException}</td>
   * <td>{@link ServerException}</td>
   * </tr>
   * <tr>
   * <td>{@link SystemException}</td>
   * <td>wrapException({@link #mapSystemException})</td>
   * </tr>
   * <tr>
   * <td>{@link RuntimeException}</td>
   * <td><b>rethrows</b></td>
   * </tr>
   * <tr>
   * <td>Any other exception</td>
   * <td>{@link UnexpectedException}</td>
   * </tr>
   * </table>
   * 
   * @param ex an exception that was thrown on a server side implementation.
   * 
   * @return the corresponding RemoteException unless it is a RuntimeException.
   * 
   * @throws RuntimeException the passed exception if it is an instance of
   * RuntimeException.
   * 
   * @specnote It is the same behavior, as in Suns implementations 1.4.0-1.5.0.
   */
  public RemoteException wrapException(Throwable ex)
    throws RuntimeException
  {
    if (ex instanceof RuntimeException)
      throw (RuntimeException) ex;
    else if (ex instanceof Error)
      return new ServerError(ex.getMessage(), (Error) ex);
    else if (ex instanceof RemoteException)
      return new ServerException(ex.getMessage(), (Exception) ex);
    else if (ex instanceof SystemException)
      return wrapException(mapSystemException((SystemException) ex));
    else
      return new UnexpectedException("Unexpected", (Exception) ex);
  }

  /**
   * Write abstract interface to the CORBA output stream. The write format is
   * matching CORBA abstract interface. Remotes and CORBA objects are written as
   * objects, other classes are supposed to be value types and are written as
   * such. {@link Remote}s are processed as defined in
   * {@link #writeRemoteObject}. The written data contains discriminator,
   * defining, that was written. Another method that writes the same content is
   * {@link org.omg.CORBA_2_3.portable.OutputStream#write_abstract_interface(java.lang.Object)}.
   * 
   * @param output a stream to write to, must be
   * {@link org.omg.CORBA_2_3.portable.OutputStream}.
   * 
   * @param object an object to write, must be CORBA object, Remote
   */
  public void writeAbstractObject(OutputStream output, Object object)
  {
    ((org.omg.CORBA_2_3.portable.OutputStream) output).write_abstract_interface(object);
  }

  /**
   * Write the passed java object to the output stream in the form of the CORBA
   * {@link Any}. This includes creating an writing the object {@link TypeCode}
   * first. Such Any can be later read by a non-RMI-IIOP CORBA implementation
   * and manipulated, for instance, by means, provided in
   * {@link org.omg.DynamicAny.DynAny}. Depending from the passed value, this
   * method writes CORBA object, value type or value box. For value types Null
   * is written with the abstract interface, its typecode having repository id
   * "IDL:omg.org/CORBA/AbstractBase:1.0" and the empty string name.
   * 
   * @param output the object to write.
   * @param object the java object that must be written in the form of the CORBA
   * {@link Any}.
   */
  public void writeAny(OutputStream output, Object object)
  {
    Any any = output.orb().create_any();
    if (object == null)
      {
        GeneralTypeCode t = new GeneralTypeCode(TCKind.tk_abstract_interface);
        t.setId("IDL:omg.org/CORBA/AbstractBase:1.0");
        t.setName("");
        any.type(t);
        output.write_any(any);
        return;
      }
    else if (object instanceof org.omg.CORBA.Object
      && !(object instanceof Remote))
      {
        // Write as value type.
        boolean inserted = ObjectCreator.insertWithHelper(any, object);
        if (inserted)
          {
            output.write_any(any);
            return;
          }
      }

    if (object instanceof org.omg.CORBA.Object)
      writeAnyAsRemote(output, object);
    else if (object instanceof Serializable)
      {
        any.insert_Value((Serializable) object);
        output.write_any(any);
      }
    else
      {
        MARSHAL m = new MARSHAL(object.getClass().getName()
          + " must be CORBA Object, Remote or Serializable");
        m.minor = Minor.NonSerializable;
        throw m;
      }
  }

  /**
   * Write Any as for remote object.
   */
  void writeAnyAsRemote(OutputStream output, Object object)
  {
    GeneralTypeCode t = new GeneralTypeCode(TCKind.tk_objref);
    t.setId(m_ValueHandler.getRMIRepositoryID(object.getClass()));
    t.setName(object.getClass().getName());

    // Writing Any (typecode, followed by value).
    output.write_TypeCode(t);
    writeRemoteObject(output, object);
  }

  /**
   * Get the class name excluding the package name.
   */
  String getName(String n)
  {
    int p = n.lastIndexOf('.');
    if (p < 0)
      return n;
    else
      return n.substring(p + 1);
  }

  /**
   * Read Any from the input stream.
   */
  public Object readAny(InputStream input)
  {
    return input.read_any();
  }

  /**
   * Write the passed parameter to the output stream as CORBA object. If the
   * parameter is an instance of Remote and not an instance of Stub, the method
   * instantiates a suitable Tie, connects the parameter to this Tie and then
   * connects that Tie to the ORB that is requested from the output stream. Then
   * the object reference is written to the stream, making remote invocations
   * possible. This method is used in write_value(..) method group in
   * {@link org.omg.CORBA_2_3.portable.OutputStream} and also may be called
   * directly from generated Stubs and Ties.
   * 
   * @param output a stream to write to, must be
   * org.omg.CORBA_2_3.portable.OutputStream
   * @param object an object to write.
   */
  public void writeRemoteObject(OutputStream an_output, Object object)
  {
    org.omg.CORBA_2_3.portable.OutputStream output = (org.omg.CORBA_2_3.portable.OutputStream) an_output;
    if (object == null)
      an_output.write_Object(null);
    else if (isTieRequired(object))
      {
        // Find the interface that is implemented by the object and extends
        // Remote.
        Class fc = getExportedInterface(object);
        exportTie(output, object, fc);
      }
    else if (object instanceof org.omg.CORBA.Object)
      {
        ensureOrbRunning(output);
        an_output.write_Object((org.omg.CORBA.Object) object);
      }
    else if (object != null && object instanceof Serializable)
      writeFields(an_output, (Serializable) object);
  }

}