javax.rmi.CORBA

Interface UtilDelegate

public interface UtilDelegate

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.

Method Summary
Object	copyObject(Object obj, ORB orb) Used by local stubs to create a copy of the object.
Object[]	copyObjects(Object[] obj, ORB orb) Used by local stubs to create a multiple copies of the object, preserving sharing accross the parameters if necessary.
ValueHandler	createValueHandler() Get the value handler that Serializes Java objects to and from CDR (GIOP) streams.
String	getCodebase(Class clz)
Tie	getTie(Remote target) Get the Tie that handles invocations on the given target.
boolean	isLocal(Stub stub) Checks if the given stub is local.
Class	loadClass(String className, String remoteCodebase, ClassLoader loader)
RemoteException	mapSystemException(SystemException ex) Converts CORBA {@link SystemException} into RMI {@link RemoteException}.
Object	readAny(InputStream input) Read Any from the input stream.
void	registerTarget(Tie tie, Remote target) Register the Tie-target pair.
void	unexportObject(Remote target) Deactivate the associated Tie, if it is found and is not connected to other registered targets.
RemoteException	wrapException(Throwable orig) 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.
void	writeAbstractObject(OutputStream output, Object object) Write abstract interface to the CORBA output stream.
void	writeAny(OutputStream output, Object object) Write the passed java object to the output stream in the form of the CORBA {@link Any}.
void	writeRemoteObject(OutputStream output, Object obj) Write the passed parameter to the output stream as CORBA object.

Method Detail

copyObject

public Object copyObject(Object obj, ORB orb)

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

copyObjects

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

Used by local stubs to create a multiple copies of the object, preserving sharing accross the parameters if necessary.

createValueHandler

public ValueHandler createValueHandler()

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

getCodebase

public String getCodebase(Class clz)

getTie

public Tie getTie(Remote target)

Get the Tie that handles invocations on the given target. The target/Tie pair must be previously registered using {@link #registerTarget}.

Returns: the Tie, or null if no such is known.

isLocal

public boolean isLocal(Stub stub)

Checks if the given stub is local.

loadClass

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

mapSystemException

public RemoteException mapSystemException(SystemException ex)

Converts CORBA {@link SystemException} into RMI {@link RemoteException}. The exception is converted as defined in the following table:

CORBA Exception	RMI Exception
{@link COMM_FAILURE}	{@link MarshalException}
{@link INV_OBJREF}	{@link NoSuchObjectException}
{@link NO_PERMISSION}	{@link AccessException}
{@link MARSHAL}	{@link MarshalException}
{@link BAD_PARAM} (all other cases)	{@link MarshalException}
{@link OBJECT_NOT_EXIST}	{@link NoSuchObjectException}
{@link TRANSACTION_REQUIRED}	{@link TransactionRequiredException}
{@link TRANSACTION_ROLLEDBACK}	{@link TransactionRolledbackException}
{@link INVALID_TRANSACTION}	{@link InvalidTransactionException}
Any other {@link SystemException}	{@link RemoteException}

The exception detailed message always consists of

the string "CORBA "
the CORBA name of the system exception
single space
the hexadecimal value of the system exception's minor code, preceeded by 0x (higher bits contain {@link OMGVMCID}).
single space
the {@link CompletionStatus} of the exception: "Yes", "No" or "Maybe".

The subsequent content is not part of the official RMI-IIOP standart and is added for compatibility with Sun's implementation:

the phrase "; nested exception is: (line feed)(tab)"
the full name of the mapped SystemException, as returned by Class.getName().
the ": ".
the value, returned by .getMessage() of the passed parameter.

For instance, if the Internet connection was refused:

CORBA COMM_FAILURE 0x535500C9 No

The original CORBA exception is set as the cause of the RemoteException being created.

readAny

public Object readAny(InputStream input)

Read Any from the input stream.

registerTarget

public void registerTarget(Tie tie, Remote target)

unexportObject

public void unexportObject(Remote target)

Deactivate the associated Tie, if it is found and is not connected to other registered targets.

wrapException

public RemoteException wrapException(Throwable orig)

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:

Exception to map (or subclass)	Maps into
{@link Error}	{@link ServerError}
{@link RemoteException}	{@link ServerException}
{@link SystemException}	wrapException({@link #mapSystemException})
{@link RuntimeException}	rethrows
Any other exception	{@link UnexpectedException}

Parameters: ex an exception that was thrown on a server side implementation.

Returns: the corresponding RemoteException unless it is a RuntimeException.

Throws: RuntimeException the passed exception if it is an instance of RuntimeException.

UNKNOWN: It is the same behavior, as in Suns implementations 1.4.0-1.5.0.

writeAbstractObject

public void writeAbstractObject(OutputStream output, Object object)

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)}.

Parameters: output a stream to write to, must be {@link org.omg.CORBA_2_3.portable.OutputStream}. object an object to write, must be CORBA object, Remote

writeAny

public void writeAny(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.

Parameters: output the object to write. object the java object that must be written in the form of the CORBA {@link Any}.

writeRemoteObject

public void writeRemoteObject(OutputStream output, Object obj)

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.

Parameters: output a stream to write to, must be org.omg.CORBA_2_3.portable.OutputStream object an object to write.