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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/rmi/CORBA/PortableRemoteObjectDelegate.java
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+/* PortableRemoteObjectDelegate.java -- Interface supporting PortableRemoteObject
+ Copyright (C) 2002, 2004, 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
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+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
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.rmi.CORBA;
+
+import java.rmi.NoSuchObjectException;
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+
+/**
+ * A delegate, implementing the functionality, provided by the
+ * {@link PortableRemoteObject}.
+ *
+ * The default delegate can be altered by setting the system property
+ * "javax.rmi.CORBA.PortableRemoteObjectClass" to the name of the alternative
+ * class that must implement {@link PortableRemoteObjectDelegate}.
+ *
+ * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
+ */
+public interface PortableRemoteObjectDelegate
+{
+ /**
+ * <p>
+ * Makes the remote object <code>target</code> ready for remote
+ * communication using the same communications runtime as for the passed
+ * <code>source</code> parameter. Connection normally happens implicitly
+ * when the object is sent or received as an argument on a remote method call.
+ * </p>
+ * <p>
+ * The target object is connected to the same ORB as source by calling the
+ * {@link Stub#connect} if it is a stub or by associating its tie with an ORB
+ * if it is an implementation object.
+ * </p>
+ *
+ * @param target the target object that may be either an RMI/IDL stub or an
+ * exported RMI/IDL implementation object
+ * @param source the source object may also be either an RMI/IDL stub or an
+ * exported RMI/IDL implementation object.
+ *
+ * @throws RemoteException if the target is already connected to another ORB.
+ */
+ void connect(Remote target, Remote source)
+ throws RemoteException;
+
+ /**
+ * Register the passed object with the ORB runtimes, making it remotely
+ * accessible. When called on jre with no objects exported, creates a
+ * non-daemon thread that prevents jre from terminating until all objects are
+ * unexported. Also, such object cannot be collected by garbage collector.
+ * This is usually impemented via {@link Util#unexportObject}
+ *
+ * @param obj the object to export.
+ *
+ * @throws RemoteException
+ */
+ void exportObject(Remote obj)
+ throws RemoteException;
+
+ /**
+ * Narrows the passed object to conform to the given interface or IDL type.
+ * This method may return different instance and cannot be replaced by the
+ * direct cast.
+ *
+ * @param narrowFrom an object to narrow.
+ * @param narrowTo a type to that the object must be narrowed.
+ *
+ * @return On success, an object of type narrowTo or null, if narrowFrom =
+ * null.
+ *
+ * @throws ClassCastException if no narrowing is possible.
+ */
+ Object narrow(Object narrowFrom, Class narrowTo)
+ throws ClassCastException;
+
+ /**
+ * Takes a server implementation object and returns a stub object that can be
+ * used to access that server object (target). If the target is connected, the
+ * returned stub is also connected to the same ORB. If the target is
+ * unconnected, the returned stub is unconnected.
+ *
+ * @param obj a server side object.
+ * @return a stub object that can be used to access that server object.
+ *
+ * @throws NoSuchObjectException if a stub cannot be located for the given
+ * target.
+ */
+ Remote toStub(Remote obj)
+ throws NoSuchObjectException;
+
+ /**
+ * Deregister a currently exported server object from the ORB runtimes. The
+ * object to becomes available for garbage collection. This is usually
+ * impemented via {@link Util#unexportObject}
+ *
+ * @param obj the object to unexport.
+ *
+ * @throws NoSuchObjectException if the passed object is not currently
+ * exported.
+ */
+ void unexportObject(Remote obj)
+ throws NoSuchObjectException;
+}