javax.rmi.CORBA
Class Util

java.lang.Object
  |
  +--javax.rmi.CORBA.Util

public class Util

extends Object

Provides utility methods that can be used by stubs and ties to perform common operations.

Method Summary

static Object	copyObject(Object obj, ORB orb) Copies or connects an object.
static Object[]	copyObjects(Object[] obj, ORB orb) Copies or connects an array of objects.
static ValueHandler	createValueHandler() Returns a singleton instance of a class that implements the ValueHandler interface.
static String	getCodebase(Class clz) Returns the codebase, if any, for the given class.
static Tie	getTie(Remote target) Returns the tie (if any) for a given target object.
static boolean	isLocal(Stub stub) Returns true if the stub is in the same ORB instance as is the servant.
static Class	loadClass(String className, String remoteCodebase, ClassLoader loader) Returns a class instance for the specified class.
static RemoteException	mapSystemException(SystemException ex) Maps a SystemException to a RemoteException.
static Object	readAny(InputStream in) Reads a java.lang.Object as a CORBA any.
static void	registerTarget(Tie tie, Remote target) Registers a target for a tie.
static void	unexportObject(Remote target) Removes the associated tie from an internal table and calls Tie.deactivate() to deactivate the object.
static RemoteException	wrapException(Throwable orig) Wraps an exception thrown by an implementation method.
static void	writeAbstractObject(OutputStream out, Object obj) Writes a java.lang.Object as either a value or a CORBA Object.
static void	writeAny(OutputStream out, Object obj) Writes any java.lang.Object as a CORBA any.
static void	writeRemoteObject(OutputStream out, Object obj) Writes a java.lang.Object as a CORBA Object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

mapSystemException

public static RemoteException mapSystemException(SystemException ex)

Maps a SystemException to a RemoteException.

Parameters:

ex - the SystemException to map.

Returns:

the mapped exception.

writeAny

public static void writeAny(OutputStream out,
                            Object obj)

Writes any java.lang.Object as a CORBA any.

Parameters:

out - the stream in which to write the any.

obj - the object to write as an any.

readAny

public static Object readAny(InputStream in)

Reads a java.lang.Object as a CORBA any.

Parameters:

in - the stream from which to read the any.

Returns:

the object read from the stream.

writeRemoteObject

public static void writeRemoteObject(OutputStream out,
                                     Object obj)

Writes a java.lang.Object as a CORBA Object. If obj is an exported RMI-IIOP server object, the tie is found and wired to obj, then written to out.write_Object(org.omg.CORBA.Object). If obj is a CORBA Object, it is written to out.write_Object(org.omg.CORBA.Object).

Parameters:

out - the stream in which to write the object.

obj - the object to write.

writeAbstractObject

public static void writeAbstractObject(OutputStream out,
                                       Object obj)

Writes a java.lang.Object as either a value or a CORBA Object. If obj is a value object or a stub object, it is written to out.write_abstract_interface(java.lang.Object). If obj is an exported RMI-IIOP server object, the tie is found and wired to obj, then written to out.write_abstract_interface(java.lang.Object).

Parameters:

out - the stream in which to write the object.

obj - the object to write.

registerTarget

public static void registerTarget(Tie tie,
                                  Remote target)

Registers a target for a tie. Adds the tie to an internal table and calls Tie.setTarget(java.rmi.Remote) on the tie object.

Parameters:

tie - the tie to register.

target - the target for the tie.

unexportObject

public static void unexportObject(Remote target)

Removes the associated tie from an internal table and calls Tie.deactivate() to deactivate the object.

Parameters:

target - the object to unexport.

getTie

public static Tie getTie(Remote target)

Returns the tie (if any) for a given target object.

Returns:

the tie or null if no tie is registered for the given target.

createValueHandler

public static ValueHandler createValueHandler()

Returns a singleton instance of a class that implements the ValueHandler interface.

Returns:

a class which implements the ValueHandler interface.

getCodebase

public static String getCodebase(Class clz)

Returns the codebase, if any, for the given class.

Parameters:

clz - the class to get a codebase for.

Returns:

a space-separated list of URLs, or null.

loadClass

public static Class loadClass(String className,
                              String remoteCodebase,
                              ClassLoader loader)
                       throws ClassNotFoundException

Returns a class instance for the specified class.

Parameters:

className - the name of the class.

remoteCodebase - a space-separated list of URLs at which the class might be found. May be null.

loadingContext - a class whose ClassLoader may be used to load the class if all other methods fail.

Returns:

the Class object representing the loaded class.

Throws:

ClassNotFoundException - if class cannot be loaded.

isLocal

public static boolean isLocal(Stub stub)
                       throws RemoteException

Returns true if the stub is in the same ORB instance as is the servant. This method is equivalent to ObjectImpl._is_local() except that it throws a RemoteException instead of a SystemException.

Parameters:

stub - the stub to test.

Returns:

true if local, false if not.

Throws:

RemoteException - if stub has not been connected to an ORB.

wrapException

public static RemoteException wrapException(Throwable orig)

Wraps an exception thrown by an implementation method. It returns the corresponding client-side exception.

Parameters:

orig - the exception to wrap.

Returns:

the wrapped exception.

copyObjects

public static Object[] copyObjects(Object[] obj,
                                   ORB orb)
                            throws RemoteException

Copies or connects an array of objects. Used by local stubs to copy any number of actual parameters, preserving sharing across parameters as necessary to support RMI semantics.

Parameters:

obj - the objects to copy or connect.

orb - the ORB.

Returns:

the copied or connected objects.

Throws:

RemoteException - if any object could not be copied or connected.

copyObject

public static Object copyObject(Object obj,
                                ORB orb)
                         throws RemoteException

Copies or connects an object. Used by local stubs to copy an actual parameter, result object, or exception.

Parameters:

obj - the object to copy.

orb - the ORB.

Returns:

the copy or connected object.

Throws:

RemoteException - if the object could not be copied or connected.