You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
267 lines
9.5 KiB
267 lines
9.5 KiB
/*
|
|
* Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
|
|
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
package org.omg.PortableServer;
|
|
|
|
import org.omg.CORBA.ORB;
|
|
import org.omg.PortableServer.portable.Delegate;
|
|
|
|
/**
|
|
* Defines the native <code>Servant</code> type. In Java, the
|
|
* <code>Servant</code> type is mapped to the Java
|
|
* <code>org.omg.PortableServer.Servant</code> class.
|
|
* It serves as the base class for all POA servant
|
|
* implementations and provides a number of methods that may
|
|
* be invoked by the application programmer, as well as methods
|
|
* which are invoked by the POA itself and may be overridden by
|
|
* the user to control aspects of servant behavior.
|
|
* Based on IDL to Java spec. (CORBA V2.3.1) ptc/00-01-08.pdf.
|
|
*/
|
|
|
|
abstract public class Servant {
|
|
|
|
private transient Delegate _delegate = null;
|
|
/**
|
|
* Gets the ORB vendor-specific implementation of
|
|
* <code>PortableServer::Servant</code>.
|
|
* @return <code>_delegate</code> the ORB vendor-specific
|
|
* implementation of <code>PortableServer::Servant</code>.
|
|
*/
|
|
final public Delegate _get_delegate() {
|
|
if (_delegate == null) {
|
|
throw
|
|
new
|
|
org.omg.CORBA.BAD_INV_ORDER
|
|
("The Servant has not been associated with an ORB instance");
|
|
}
|
|
return _delegate;
|
|
}
|
|
|
|
/**
|
|
* Supports the Java ORB portability
|
|
* interfaces by providing a method for classes that support
|
|
* ORB portability through delegation to set their delegate.
|
|
* @param delegate ORB vendor-specific implementation of
|
|
* the <code>PortableServer::Servant</code>.
|
|
*/
|
|
final public void _set_delegate(Delegate delegate) {
|
|
_delegate = delegate;
|
|
}
|
|
|
|
/**
|
|
* Allows the servant to obtain the object reference for
|
|
* the target CORBA object it is incarnating for that request.
|
|
* @return <code>this_object</code> <code>Object</code> reference
|
|
* associated with the request.
|
|
*/
|
|
final public org.omg.CORBA.Object _this_object() {
|
|
return _get_delegate().this_object(this);
|
|
}
|
|
|
|
/**
|
|
* Allows the servant to obtain the object reference for
|
|
* the target CORBA Object it is incarnating for that request.
|
|
* @param orb ORB with which the servant is associated.
|
|
* @return <code>_this_object</code> reference associated with the request.
|
|
*/
|
|
final public org.omg.CORBA.Object _this_object(ORB orb) {
|
|
try {
|
|
((org.omg.CORBA_2_3.ORB)orb).set_delegate(this);
|
|
}
|
|
catch(ClassCastException e) {
|
|
throw
|
|
new
|
|
org.omg.CORBA.BAD_PARAM
|
|
("POA Servant requires an instance of org.omg.CORBA_2_3.ORB");
|
|
}
|
|
return _this_object();
|
|
}
|
|
|
|
/**
|
|
* Returns the instance of the ORB
|
|
* currently associated with the <code>Servant</code> (convenience method).
|
|
* @return <code>orb</code> the instance of the ORB currently
|
|
* associated with the <code>Servant</code>.
|
|
*/
|
|
final public ORB _orb() {
|
|
return _get_delegate().orb(this);
|
|
}
|
|
|
|
/**
|
|
* Allows easy execution of common methods, equivalent to
|
|
* <code>PortableServer::Current:get_POA</code>.
|
|
* @return <code>poa</code> POA associated with the servant.
|
|
*/
|
|
final public POA _poa() {
|
|
return _get_delegate().poa(this);
|
|
}
|
|
|
|
/**
|
|
* Allows easy execution of
|
|
* common methods, equivalent
|
|
* to calling <code>PortableServer::Current::get_object_id</code>.
|
|
* @return <code>object_id</code> the <code>Object</code> ID associated
|
|
* with this servant.
|
|
*/
|
|
final public byte[] _object_id() {
|
|
return _get_delegate().object_id(this);
|
|
}
|
|
|
|
/**
|
|
* Returns the
|
|
* root POA from the ORB instance associated with the servant.
|
|
* Subclasses may override this method to return a different POA.
|
|
* @return <code>default_POA</code> the POA associated with the
|
|
* <code>Servant</code>.
|
|
*/
|
|
public POA _default_POA() {
|
|
return _get_delegate().default_POA(this);
|
|
}
|
|
|
|
/**
|
|
* Checks to see if the specified <code>repository_id</code> is present
|
|
* on the list returned by <code>_all_interfaces()</code> or is the
|
|
* <code>repository_id</code> for the generic CORBA Object.
|
|
* @param repository_id the <code>repository_id</code>
|
|
* to be checked in the repository list or against the id
|
|
* of generic CORBA objects.
|
|
* @return <code>is_a</code> boolean indicating whether the specified
|
|
* <code>repository_id</code> is
|
|
* in the repository list or is same as a generic CORBA
|
|
* object.
|
|
*/
|
|
public boolean _is_a(String repository_id) {
|
|
return _get_delegate().is_a(this, repository_id);
|
|
}
|
|
|
|
/**
|
|
* Checks for the existence of an
|
|
* <code>Object</code>.
|
|
* The <code>Servant</code> provides a default implementation of
|
|
* <code>_non_existent()</code> that can be overridden by derived servants.
|
|
* @return <code>non_existent</code> <code>true</code> if that object does
|
|
* not exist, <code>false</code> otherwise.
|
|
*/
|
|
public boolean _non_existent() {
|
|
return _get_delegate().non_existent(this);
|
|
}
|
|
|
|
// Ken and Simon will ask about editorial changes
|
|
// needed in IDL to Java mapping to the following
|
|
// signature.
|
|
/**
|
|
* Returns an object in the Interface Repository
|
|
* which provides type information that may be useful to a program.
|
|
* <code>Servant</code> provides a default implementation of
|
|
* <code>_get_interface()</code>
|
|
* that can be overridden by derived servants if the default
|
|
* behavior is not adequate.
|
|
* @return <code>get_interface</code> type information that corresponds to this servant.
|
|
*/
|
|
/*
|
|
public org.omg.CORBA.Object _get_interface() {
|
|
return _get_delegate().get_interface(this);
|
|
}
|
|
*/
|
|
|
|
// _get_interface_def() replaces the _get_interface() method
|
|
|
|
/**
|
|
* Returns an <code>InterfaceDef</code> object as a
|
|
* <code>CORBA::Object</code> that defines the runtime type of the
|
|
* <code>CORBA::Object</code> implemented by the <code>Servant</code>.
|
|
* The invoker of <code>_get_interface_def</code>
|
|
* must narrow the result to an <code>InterfaceDef</code> in order
|
|
* to use it.
|
|
* <P>This default implementation of <code>_get_interface_def()</code>
|
|
* can be overridden
|
|
* by derived servants if the default behavior is not adequate.
|
|
* As defined in the CORBA 2.3.1 specification, section 11.3.1, the
|
|
* default behavior of <code>_get_interface_def()</code> is to use
|
|
* the most derived
|
|
* interface of a static servant or the most derived interface retrieved
|
|
* from a dynamic servant to obtain the <code>InterfaceDef</code>.
|
|
* This behavior must
|
|
* be supported by the <code>Delegate</code> that implements the
|
|
* <code>Servant</code>.
|
|
* @return <code>get_interface_def</code> an <code>InterfaceDef</code>
|
|
* object as a
|
|
* <code>CORBA::Object</code> that defines the runtime type of the
|
|
* <code>CORBA::Object</code> implemented by the <code>Servant</code>.
|
|
*/
|
|
public org.omg.CORBA.Object _get_interface_def()
|
|
{
|
|
// First try to call the delegate implementation class's
|
|
// "Object get_interface_def(..)" method (will work for ORBs
|
|
// whose delegates implement this method).
|
|
// Else call the delegate implementation class's
|
|
// "InterfaceDef get_interface(..)" method using reflection
|
|
// (will work for ORBs that were built using an older version
|
|
// of the Delegate interface with a get_interface method
|
|
// but not a get_interface_def method).
|
|
|
|
org.omg.PortableServer.portable.Delegate delegate = _get_delegate();
|
|
try {
|
|
// If the ORB's delegate class does not implement
|
|
// "Object get_interface_def(..)", this will throw
|
|
// an AbstractMethodError.
|
|
return delegate.get_interface_def(this);
|
|
} catch( AbstractMethodError aex ) {
|
|
// Call "InterfaceDef get_interface(..)" method using reflection.
|
|
try {
|
|
Class[] argc = { org.omg.PortableServer.Servant.class };
|
|
java.lang.reflect.Method meth =
|
|
delegate.getClass().getMethod("get_interface", argc);
|
|
Object[] argx = { this };
|
|
return (org.omg.CORBA.Object)meth.invoke(delegate, argx);
|
|
} catch( java.lang.reflect.InvocationTargetException exs ) {
|
|
Throwable t = exs.getTargetException();
|
|
if (t instanceof Error) {
|
|
throw (Error) t;
|
|
} else if (t instanceof RuntimeException) {
|
|
throw (RuntimeException) t;
|
|
} else {
|
|
throw new org.omg.CORBA.NO_IMPLEMENT();
|
|
}
|
|
} catch( RuntimeException rex ) {
|
|
throw rex;
|
|
} catch( Exception exr ) {
|
|
throw new org.omg.CORBA.NO_IMPLEMENT();
|
|
}
|
|
}
|
|
}
|
|
|
|
// methods for which the user must provide an
|
|
// implementation
|
|
/**
|
|
* Used by the ORB to obtain complete type
|
|
* information from the servant.
|
|
* @param poa POA with which the servant is associated.
|
|
* @param objectId is the id corresponding to the object
|
|
* associated with this servant.
|
|
* @return list of type information for the object.
|
|
*/
|
|
abstract public String[] _all_interfaces( POA poa, byte[] objectId);
|
|
}
|