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+/* NamingMap.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.NamingService;
+
+import org.omg.CosNaming.NameComponent;
+import org.omg.CosNaming.NamingContextPackage.AlreadyBound;
+import org.omg.CosNaming.NamingContextPackage.InvalidName;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+
+/**
+ * The Naming Map maps the single names components into associated objects or
+ * naming contexts.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public class NamingMap
+{
+ /**
+ * The actual map.
+ */
+ protected final TreeMap map;
+
+ /**
+ * Creates an instance of the naming map, intialising the comparator
+ * to the {@link NameComponentComparator}.
+ */
+ public NamingMap()
+ {
+ map = new TreeMap(NameComponentComparator.singleton);
+ }
+
+ /**
+ * Put the given GIOP object, specifying the given name as a key.
+ * If the entry with the given name already exists, or if the given
+ * object is already mapped under another name, the
+ * {@link AlreadyBound} exception will be thrown.
+ *
+ * @param name the name
+ * @param object the object
+ */
+ public void bind(NameComponent name, org.omg.CORBA.Object object)
+ throws AlreadyBound, InvalidName
+ {
+ if (containsKey(name))
+ {
+ Object x = get(name);
+
+ // Do not throw an exception if the same object is named by
+ // the same name.
+ if (x.equals(object))
+ throw new AlreadyBound("The name is in use for another object");
+ }
+ else
+ {
+ if (containsValue(object))
+ throw new AlreadyBound("The object has another name");
+ }
+
+ // There are no restrictions in binding the object.
+ rebind(name, object);
+ }
+
+ /**
+ * Checks if this map contains the definition of the given name.
+ *
+ * @param key the name to check.
+ */
+ public boolean containsKey(NameComponent key)
+ {
+ return map.containsKey(key);
+ }
+
+ /**
+ * Checks if this map contains the definition of the given object.
+ *
+ * @param object the object to check.
+ */
+ public boolean containsValue(org.omg.CORBA.Object object)
+ {
+ return map.containsValue(object);
+ }
+
+ /**
+ * Returns the map entry set.
+ *
+ * @return the map entry set, containing the instances of the
+ * Map.Entry.
+ */
+ public Set entries()
+ {
+ return map.entrySet();
+ }
+
+ /**
+ * Get the CORBA object, associated with the given name.
+ *
+ * @param name the name.
+ *
+ * @return the associated object, null if none.
+ */
+ public org.omg.CORBA.Object get(NameComponent name)
+ {
+ return (org.omg.CORBA.Object) map.get(name);
+ }
+
+ /**
+ * Put the given GIOP object, specifying the given name as a key.
+ * Remove all pre - existing mappings for the given name and object.
+ *
+ * @param name the name.
+ * @param object
+ */
+ public void rebind(NameComponent name, org.omg.CORBA.Object object)
+ throws InvalidName
+ {
+ // Remove the existing mapping for the given name, if present.
+ remove(name);
+
+ Iterator iter = entries().iterator();
+ Map.Entry item;
+
+ // Remove the existing mapping for the given object, if present.
+ while (iter.hasNext())
+ {
+ item = (Map.Entry) iter.next();
+ if (item.getValue().equals(object))
+ iter.remove();
+ }
+
+ map.put(name, object);
+ }
+
+ /**
+ * Removes the given name, if present.
+ *
+ * @param name a name to remove.
+ */
+ public void remove(NameComponent name)
+ {
+ map.remove(name);
+ }
+
+ /**
+ * Get the size of the map.
+ */
+ public int size()
+ {
+ return map.size();
+ }
+}