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1   /*
2    * $Header$
3    * $Revision: 1154 $
4    * $Date: 2006-06-01 06:19:30 -0700 (Thu, 01 Jun 2006) $
5    *
6    * ====================================================================
7    *
8    * Copyright 2000-2002 bob mcwhirter & James Strachan.
9    * All rights reserved.
10   *
11   * Redistribution and use in source and binary forms, with or without
12   * modification, are permitted provided that the following conditions are
13   * met:
14   * 
15   *   * Redistributions of source code must retain the above copyright
16   *     notice, this list of conditions and the following disclaimer.
17   * 
18   *   * Redistributions in binary form must reproduce the above copyright
19   *     notice, this list of conditions and the following disclaimer in the
20   *     documentation and/or other materials provided with the distribution.
21   * 
22   *   * Neither the name of the Jaxen Project nor the names of its
23   *     contributors may be used to endorse or promote products derived 
24   *     from this software without specific prior written permission.
25   * 
26   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
30   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37   *
38   * ====================================================================
39   * This software consists of voluntary contributions made by many 
40   * individuals on behalf of the Jaxen Project and was originally 
41   * created by bob mcwhirter <bob@werken.com> and 
42   * James Strachan <jstrachan@apache.org>.  For more information on the 
43   * Jaxen Project, please see <http://www.jaxen.org/>.
44   * 
45   * $Id: QualifiedName.java 1154 2006-06-01 13:19:30Z elharo $
46   */
47  
48  package org.jaxen;
49  
50  import java.io.Serializable;
51  
52  /** A local name (that matches the XML NCName production) and a namespace URI
53   *  with which the local name is qualified.
54   *
55   *  @author Erwin Bolwidt ( ejb@klomp.org )
56   */
57  class QualifiedName implements Serializable
58  {
59  
60      private static final long serialVersionUID = 2734958615642751535L;
61      
62      private String namespaceURI;
63      private String localName;
64  
65      /** Constructs a QualifiedName object.
66       *
67       *  @param namespaceURI namespace URI that qualifies the name, or
68       *                      <code>null</code> for default namespace
69       *  @param localName    local name that is qualified by the namespace uri;
70       *                      must not be <code>null</code>
71       */
72      QualifiedName( String namespaceURI, String localName )
73      {
74          if (namespaceURI == null) namespaceURI = "";
75          this.namespaceURI = namespaceURI;
76          this.localName = localName;
77      }
78  
79      public int hashCode()
80      {
81          return ( localName.hashCode() ^ namespaceURI.hashCode() );
82      }
83  
84      public boolean equals( Object o )
85      {
86          // Because this class is package protected and used in only
87          // two other classes, it's never actually compared to anything 
88          // other than another QualifiedName. No instanceof test is
89          // necessary here.
90          QualifiedName other = (QualifiedName) o;
91          return ( namespaceURI.equals(other.namespaceURI) &&
92                   other.localName.equals(localName) );
93      }
94      
95      /**
96       * @return James Clark's namespace form
97       */
98      String getClarkForm() {
99          if ("".equals(namespaceURI)) return localName;
100         else return "{" + namespaceURI + "}" + ":" + localName;
101     }
102     
103 }
104