TokenPipe


1   /*
2    *  (c) Copyright 2001, 2002, 2003, 2004, 2005 Hewlett-Packard Development Company, LP
3    *  All rights reserved.
4    *
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions
7    * are met:
8    * 1. Redistributions of source code must retain the above copyright
9    *    notice, this list of conditions and the following disclaimer.
10   * 2. Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in the
12   *    documentation and/or other materials provided with the distribution.
13   * 3. The name of the author may not be used to endorse or promote products
14   *    derived from this software without specific prior written permission.
15  
16   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26   
27   * * $Id: TokenPipe.java,v 1.11 2005/02/21 12:09:17 andy_seaborne Exp $
28     
29     AUTHOR:  Jeremy J. Carroll
30  */
31  /*
32   * TokenPipe.java
33   *
34   * Created on June 22, 2001, 12:32 AM
35   */
36  
37  package com.hp.hpl.jena.rdf.arp;
38  import org.xml.sax.Locator  ;
39  import org.xml.sax.SAXParseException  ;
40  
41  
42  /**
43   *
44   * @author  jjc
45   
46   */
47  abstract class TokenPipe implements TokenManager {
48  
49      //final List pipe = createPipe();
50      private Token last;
51      /** Creates new TokenPipe */
52      TokenPipe() {
53      }
54  
55      //abstract List createPipe();
56      abstract void putNextToken(Token t) throws SAXParseException  ;
57      abstract public Token  getNextToken();
58      void setLast(Token t) {
59          last = t;
60      }
61  
62      Locator   getLocator() {
63          //if ( pipe.size() > 0 ) {
64          //    return ((Token)pipe.get(getPosition()-1)).location;
65          //} else 
66          if ( last != null )
67            return  last.location;
68          else 
69            return null;
70      }
71  
72  
73      /**
74       * @return Returns the position.
75       */
76      //abstract int getPosition();
77  }
78
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