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diff --git a/libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java b/libjava/classpath/gnu/CORBA/NamingService/NameComponentComparator.java
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+/* NameComponentComparator.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.CORBA.BAD_PARAM;
+import org.omg.CosNaming.NameComponent;
+
+import java.util.Comparator;
+
+/**
+ * This class implements the name component comparator, needed to
+ * sort and compare the name components in maps and sorted sets.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public final class NameComponentComparator
+  implements Comparator
+{
+  /**
+   * The singleton instance of the name comparator.
+   */
+  public static final NameComponentComparator singleton = new NameComponentComparator();
+
+  /**
+   * It is enough to have a singleton.
+   */
+  private NameComponentComparator()
+  {
+  }
+
+  /**
+   * Compare the two names components.
+   *
+   * @param nc_a the first name component.
+   * @param nc_b the second name component.
+   *
+   * @return 0 if the name components are equal, non zero value
+   * as result of comparison otherwise.
+   *
+   * @throws BAD_PARAM if one of the components is empty or
+   * has {@link NameComponent#id} or {@link NameComponent#kind}
+   * field intialised to null.
+   */
+  public final int compare(Object nc_a, Object nc_b)
+  {
+    NameComponent a = (NameComponent) nc_a;
+    NameComponent b = (NameComponent) nc_b;
+
+    int cn = a.id.compareTo(b.id);
+    if (cn != 0)
+      return cn;
+    return a.kind.compareTo(b.kind);
+  }
+
+  /**
+   * All instances of this class are equal.
+   */
+  public boolean equals(Object x)
+  {
+    return x instanceof NameComponentComparator;
+  }
+}