content: /*
   * $Header$
   * $Revision$
   * $Date$
   *
   * ====================================================================
   *
   * Copyright 2000-2002 bob mcwhirter & James Strachan.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   * 
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   * 
   *   * Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   * 
   *   * Neither the name of the Jaxen Project nor the names of its
   *     contributors may be used to endorse or promote products derived 
   *     from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * ====================================================================
   * This software consists of voluntary contributions made by many 
   * individuals on behalf of the Jaxen Project and was originally 
   * created by bob mcwhirter <bob@werken.com> and 
   * James Strachan <jstrachan@apache.org>.  For more information on the 
   * Jaxen Project, please see <http://www.jaxen.org/>.
   * 
   * $Id$
   */
  
  package org.jaxen;
  
  import java.io.Serializable;
  
  /** A local name (that matches the XML NCName production) and a namespace URI
   *  with which the local name is qualified.
   *
   *  @author Erwin Bolwidt ( ejb@klomp.org )
   */
  class QualifiedName implements Serializable
  {
  
      private static final long serialVersionUID = 2734958615642751535L;
      
      private String namespaceURI;
      private String localName;
  
      /** Constructs a QualifiedName object.
       *
       *  @param namespaceURI namespace URI that qualifies the name, or
       *                      <code>null</code> for default namespace
       *  @param localName    local name that is qualified by the namespace uri;
       *                      must not be <code>null</code>
       */
      QualifiedName( String namespaceURI, String localName )
      {
          if (namespaceURI == null) namespaceURI = "";
          this.namespaceURI = namespaceURI;
          this.localName = localName;
      }
  
      public int hashCode()
      {
          return ( localName.hashCode() ^ namespaceURI.hashCode() );
      }
  
      public boolean equals( Object o )
      {
          // Because this class is package protected and used in only
          // two other classes, it's never actually compared to anything 
          // other than another QualifiedName. No instanceof test is
          // necessary here.
          QualifiedName other = (QualifiedName) o;
          return ( namespaceURI.equals(other.namespaceURI) &&
                   other.localName.equals(localName) );
      }
      
      /**
       * @return James Clark's namespace form
       */
      String getClarkForm() {
          if ("".equals(namespaceURI)) return localName;
          else return "{" + namespaceURI + "}" + ":" + localName;
      }
      
  }
  
  