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+/* gnuPoaCurrent.java --
+ Copyright (C) 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 gnu.CORBA.Poa;
+
+import org.omg.CORBA.CurrentHelper;
+import org.omg.CORBA.portable.ObjectImpl;
+import org.omg.PortableServer.Current;
+import org.omg.PortableServer.CurrentOperations;
+import org.omg.PortableServer.CurrentPackage.NoContext;
+import org.omg.PortableServer.POA;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.TreeMap;
+
+/**
+ * Supports the "Poa current" concept, providing the id and poa of
+ * the object currently being served. There is only one instance
+ * of this class per ORB. It maintains a thread to information map.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public class gnuPoaCurrent
+ extends ObjectImpl
+ implements Current
+{
+ /**
+ * The table, mapping threads to records.
+ */
+ private TreeMap threads = new TreeMap();
+
+ /**
+ * Get the array of POA current repository ids.
+ *
+ * @return a single member array, containing value, returned
+ * by the {@link CurrentHelper#id}, normally
+ * "IDL:omg.org/PortableServer/Current:2.3".
+ */
+ public String[] _ids()
+ {
+ return new String[] { CurrentHelper.id() };
+ }
+
+ /**
+ * Get the object id, associated with the thread currently being served.
+ *
+ * @throws NoContext if the current thread is not associated with any
+ * object.
+ */
+ public byte[] get_object_id()
+ throws NoContext
+ {
+ CurrentOperations r;
+ synchronized (threads)
+ {
+ r = (CurrentOperations) threads.get(Thread.currentThread().getName());
+ }
+ if (r != null)
+ return r.get_object_id();
+ else
+ throw new NoContext(Thread.currentThread().getName());
+ }
+
+ /**
+ * Get the object POA, associated with the thread currently being served.
+ *
+ * @throws NoContext if the current thread is not associated with any
+ * object.
+ */
+ public POA get_POA()
+ throws NoContext
+ {
+ CurrentOperations r;
+ synchronized (threads)
+ {
+ r = (CurrentOperations) threads.get(Thread.currentThread().getName());
+ }
+ if (r != null)
+ return r.get_POA();
+ else
+ throw new NoContext(Thread.currentThread().getName());
+ }
+
+ /**
+ * Add the entry to the map.
+ */
+ public void put(Thread t, CurrentOperations record)
+ {
+ synchronized (threads)
+ {
+ threads.put(t.getName(), record);
+ }
+ }
+
+ /**
+ * Check if this Poa has some running threads.
+ */
+ public boolean has(POA poa)
+ {
+ synchronized (threads)
+ {
+ Iterator iter = threads.entrySet().iterator();
+ while (iter.hasNext())
+ {
+ Map.Entry item = (Map.Entry) iter.next();
+ try
+ {
+ if (((CurrentOperations) item.getValue()).get_POA() == poa)
+ {
+ return true;
+ }
+ }
+ catch (NoContext ex)
+ {
+ throw new InternalError();
+ }
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Check if this thread is registered.
+ */
+ public boolean has(Thread t)
+ {
+ synchronized (threads)
+ {
+ return threads.containsKey(t.getName());
+ }
+ }
+
+ /**
+ * Remove the entry from the map.
+ */
+ public void remove(Thread t)
+ {
+ synchronized (threads)
+ {
+ threads.remove(t.getName());
+ }
+ }
+}