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/* UtilDelegate.java --

   Copyright (C) 2002, 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

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02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

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permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

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package javax.rmi.CORBA;

import org.omg.CORBA.Any;

import org.omg.CORBA.BAD_PARAM;

import org.omg.CORBA.COMM_FAILURE;

import org.omg.CORBA.CompletionStatus;

import org.omg.CORBA.INVALID_TRANSACTION;

import org.omg.CORBA.INV_OBJREF;

import org.omg.CORBA.MARSHAL;

import org.omg.CORBA.NO_PERMISSION;

import org.omg.CORBA.OBJECT_NOT_EXIST;

import org.omg.CORBA.OMGVMCID;

import org.omg.CORBA.ORB;

import org.omg.CORBA.SystemException;

import org.omg.CORBA.TRANSACTION_REQUIRED;

import org.omg.CORBA.TRANSACTION_ROLLEDBACK;

import org.omg.CORBA.TypeCode;

import org.omg.CORBA.portable.InputStream;

import org.omg.CORBA.portable.OutputStream;

import java.rmi.AccessException;

import java.rmi.MarshalException;

import java.rmi.NoSuchObjectException;

import java.rmi.Remote;

import java.rmi.RemoteException;

import java.rmi.ServerError;

import java.rmi.ServerException;

import java.rmi.UnexpectedException;

import javax.transaction.InvalidTransactionException;

import javax.transaction.TransactionRequiredException;

import javax.transaction.TransactionRolledbackException;

/**

 * A delegate, implementing the functionality, provided by the {@link Util}.

 *

 * The default delegate can be altered by setting the system property

 * "javax.rmi.CORBA.UtilClass" to the name of the alternative class that must

 * implement this interface.

 *

 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)

 */

public interface UtilDelegate

{

  /**

   * Used by local stubs to create a copy of the object.

   */

  Object copyObject(Object obj, ORB orb)

    throws RemoteException;

  /**

   * Used by local stubs to create a multiple copies of the object, preserving

   * sharing accross the parameters if necessary.

   */

  Object[] copyObjects(Object[] obj, ORB orb)

    throws RemoteException;

  /**

   * Get the value handler that Serializes Java objects to and from CDR (GIOP)

   * streams.

   */

  ValueHandler createValueHandler();

  String getCodebase(Class clz);

  /**

   * Checks if the given stub is local.

   */

  boolean isLocal(Stub stub)

    throws RemoteException;

  Class loadClass(String className, String remoteCodebase, ClassLoader loader)

    throws ClassNotFoundException;

  /**

   * 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>

   * The subsequent content is not part of the official RMI-IIOP standart and is

   * added for compatibility with Sun's implementation:

   * <ol>

   * <li>the phrase "<code>; nested exception is: <i>(line feed)(tab)</i></code>"</li>

   * <li>the full name of the mapped SystemException, as returned by

   * Class.getName().</li>

   * <li>the ": ".

   * <li>the value, returned by .getMessage() of the passed parameter.</li>

   * </ol>

   * <p>

   * For instance, if the Internet connection was refused:

   * </p><p>

   * <code>CORBA COMM_FAILURE 0x535500C9 No</code>

   * </p><p>

   * The original CORBA exception is set as the cause of the RemoteException

   * being created.

   * </p>

   */

  RemoteException mapSystemException(SystemException ex);

  /**

   * Get the Tie that handles invocations on the given target. The target/Tie

   * pair must be previously registered using {@link #registerTarget}.

   *

   * @return the Tie, or null if no such is known.

   */

  Tie getTie(Remote target);

  /**

   * Register the Tie-target pair.

   */

  void registerTarget(Tie tie, Remote target);

  /**

   * Deactivate the associated Tie, if it is found and is not connected to other

   * registered targets.

   */

  void unexportObject(Remote target)

    throws NoSuchObjectException;

  /**

   * 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 e 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.

   */

  RemoteException wrapException(Throwable orig);

  /**

   * 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 obj an object to write.

   */

  void writeRemoteObject(OutputStream output, Object obj);

  /**

   * 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

   */

  void writeAbstractObject(OutputStream output, Object 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}.

   */

  void writeAny(OutputStream output, Object object);

  /**

   * Read Any from the input stream.

   */

  Object readAny(InputStream input);

}