Initial revision

From-SVN: r102074
2005-07-16 00:30:23 +00:00
parent 6f4434b39b
commit f911ba985a
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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.
+   */
+  private final TreeMap map;
+
+  /**
+   * Creates an instance of the naming map, intialising the comparator
+   * to the {@link cmpNameComparator}.
+   */
+  public NamingMap()
+  {
+    map = new TreeMap(cmpNameComponent.singleton);
+  }
+
+  /**
+   * Put the given CORBA 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("Tha object has another name");
+      }
+  }
+
+  /**
+   * 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 CORBA 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();
+  }
+}