1 /*
   2  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.rngom.nc;
  27 
  28 import javax.xml.namespace.QName;
  29 
  30 final class NullNameClass extends NameClass {
  31     protected NullNameClass() {
  32     }
  33 
  34     public boolean contains(QName name) {
  35         return false;
  36     }
  37 
  38     public int containsSpecificity(QName name) {
  39         return SPECIFICITY_NONE;
  40     }
  41 
  42     public int hashCode() {
  43         return NullNameClass.class.hashCode();
  44     }
  45 
  46     public boolean equals(Object obj) {
  47         return this==obj;
  48     }
  49 
  50     public <V> V accept(NameClassVisitor<V> visitor) {
  51         return visitor.visitNull();
  52     }
  53 
  54     public boolean isOpen() {
  55         return false;
  56     }
  57 
  58     private Object readResolve() {
  59         return NameClass.NULL;
  60     }
  61 }