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+/* CollocatedOrbs.java -- Handles collocations
+ Copyright (C) 2006 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 gnu.CORBA;
+
+import gnu.CORBA.Poa.gnuServantObject;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+
+/**
+ * This class provides support for the direct method invocations without
+ * involving the network in the case when both ORBs run on the same java
+ * virtual machine. Special attention is only needed when call is made
+ * between two independent ORBs, instantiated via ORB.init. The call to the
+ * object, obtained via IOR reference from the ORB where it was locally
+ * connected is always local anyway.
+ *
+ * For security reasons it may be sensible to keep this class and all support
+ * package private.
+ *
+ * @author Audrius Meskauskas
+ */
+class CollocatedOrbs
+{
+ /**
+ * This field is used in automated Classpath specific testing to disable
+ * the direct calls.
+ */
+ static boolean DIRECT_CALLS_ALLOWED = true;
+
+ /**
+ * Containts the references of the all running GNU Classpath ORBs in the
+ * local virtual machine. GNU Classpath ORBs register themselves here when
+ * created and unregister when either ORB.destroy is called or in the
+ * finalizer.
+ */
+ private static ArrayList orbs = new ArrayList();
+
+ /**
+ * The address of the local host.
+ */
+ static String localHost;
+
+ static
+ {
+ try
+ {
+ localHost = InetAddress.getLocalHost().getHostAddress();
+ }
+ catch (UnknownHostException ex)
+ {
+ throw new InternalError("Local host is not accessible:" + ex);
+ }
+ }
+
+ /**
+ * Register the new ORB
+ *
+ * @param orb the orb to register
+ */
+ static void registerOrb(OrbFunctional orb)
+ {
+ if (DIRECT_CALLS_ALLOWED)
+ synchronized (orbs)
+ {
+ assert ! orbs.contains(orb);
+ orbs.add(orb);
+ }
+ }
+
+ /**
+ * Unregister the ORB. The ORB will no longer be reacheable locally but may
+ * be reacheable via network as if it would be remote.
+ *
+ * @param orb the orb to unregister
+ */
+ static void unregisterOrb(OrbFunctional orb)
+ {
+ if (DIRECT_CALLS_ALLOWED)
+ synchronized (orbs)
+ {
+ assert orbs.contains(orb);
+ orbs.remove(orb);
+ }
+ }
+
+ /**
+ * Search the possibly local object. If the IOR is not local or none of the
+ * found ORBs of this virtual machine knows about it, null is returned.
+ *
+ * @param ior the IOR to search
+ * @return the found local CORBA object or null in not found.
+ */
+ static org.omg.CORBA.Object searchLocalObject(IOR ior)
+ {
+ if (! DIRECT_CALLS_ALLOWED && ! ior.Internet.host.equals(localHost))
+ return null;
+
+ synchronized (orbs)
+ {
+ OrbFunctional orb;
+ org.omg.CORBA.Object object;
+ for (int i = 0; i < orbs.size(); i++)
+ {
+ orb = (OrbFunctional) orbs.get(i);
+ object = orb.find_connected_object(ior.key, ior.Internet.port);
+ if (object != null)
+ {
+ if (object instanceof SafeForDirectCalls)
+ {
+ return object;
+ }
+ else if (object instanceof gnuServantObject)
+ {
+ return object;
+ }
+ }
+ }
+ }
+ return null;
+ }
+
+}