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1   /*
2    * $Header$
3    * $Revision: 1334 $
4    * $Date: 2008-11-29 09:58:48 -0800 (Sat, 29 Nov 2008) $
5    *
6    * ====================================================================
7    *
8    * Copyright 2000-2004 bob mcwhirter & James Strachan.
9    * All rights reserved.
10   *
11   *
12   * Redistribution and use in source and binary forms, with or without
13   * modification, are permitted provided that the following conditions are
14   * met:
15   * 
16   *   * Redistributions of source code must retain the above copyright
17   *     notice, this list of conditions and the following disclaimer.
18   * 
19   *   * Redistributions in binary form must reproduce the above copyright
20   *     notice, this list of conditions and the following disclaimer in the
21   *     documentation and/or other materials provided with the distribution.
22   * 
23   *   * Neither the name of the Jaxen Project nor the names of its
24   *     contributors may be used to endorse or promote products derived 
25   *     from this software without specific prior written permission.
26   * 
27   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
28   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
30   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
31   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
32   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
33   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
34   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
35   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
36   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
37   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38   *
39   * ====================================================================
40   * This software consists of voluntary contributions made by many
41   * individuals on behalf of the Jaxen Project and was originally
42   * created by bob mcwhirter <bob@werken.com> and
43   * James Strachan <jstrachan@apache.org>.  For more information on the
44   * Jaxen Project, please see <http://www.jaxen.org/>.
45   *
46   * $Id: TokenTypes.java 1334 2008-11-29 17:58:48Z elharo $
47   */
48  
49  package org.jaxen.saxpath.base;
50  
51  
52  class TokenTypes
53  {
54      static final int EOF   = -1;
55      static final int SKIP  = -2;
56      static final int ERROR = -3;
57  
58      static final int EQUALS = 1;
59      static final int NOT_EQUALS = 2;
60      
61      static final int LESS_THAN_SIGN = 3;
62      static final int LESS_THAN_OR_EQUALS_SIGN = 4;
63      static final int GREATER_THAN_SIGN = 5;
64      static final int GREATER_THAN_OR_EQUALS_SIGN = 6;  
65      
66      static final int PLUS  = 7;
67      static final int MINUS = 8;
68      static final int STAR  = 9;
69      static final int MOD   = 10;
70      static final int DIV   = 11;
71      
72      static final int SLASH = 12;
73      static final int DOUBLE_SLASH = 13;
74      static final int DOT = 14;
75      static final int DOT_DOT = 15;
76  
77      static final int IDENTIFIER = 16;
78  
79      static final int AT = 17;
80      static final int PIPE = 18;
81      static final int COLON = 19;
82      static final int DOUBLE_COLON = 20;
83      
84      static final int LEFT_BRACKET = 21;
85      static final int RIGHT_BRACKET = 22;    
86      static final int LEFT_PAREN = 23;
87      static final int RIGHT_PAREN = 24;
88  
89      // 25 was NOT but there is no such token in XPath
90      static final int DOLLAR = 25;
91      static final int LITERAL = 26;
92      static final int AND = 27;
93      static final int OR = 28;
94  
95      // No need for an integer token type. All numbers
96      // in XPath are doubles.
97      static final int DOUBLE = 29;
98      static final int COMMA = 30;
99      // split star into two token types
100     static final int STAR_OPERATOR = 31;
101 
102     static String getTokenText( int tokenType )
103     {
104         switch( tokenType )
105         {
106             case ERROR:
107                 return "(error)";
108             case SKIP:
109                 return "(skip)";
110             case EOF:
111                 return "(eof)";
112             case 0:
113                 return "Unrecognized token type: 0";
114             case EQUALS:
115                 return "=";
116             case NOT_EQUALS:
117                 return "!=";
118             case LESS_THAN_SIGN:
119                 return "<";
120             case LESS_THAN_OR_EQUALS_SIGN:
121                 return "<=";
122             case GREATER_THAN_SIGN:
123                 return ">";
124             case GREATER_THAN_OR_EQUALS_SIGN:
125                 return ">=";
126             case PLUS:
127                 return "+";
128             case MINUS:
129                 return "-";
130             case STAR:
131                 return "*";
132             case STAR_OPERATOR:
133                     return "*";
134             case DIV:
135                 return "div";
136             case MOD:
137                 return "mod";
138             case SLASH:
139                 return "/";
140             case DOUBLE_SLASH:
141                 return "//";
142             case DOT:
143                 return ".";
144             case DOT_DOT:
145                 return "..";
146             case IDENTIFIER:
147                 return "(identifier)";
148             case AT:
149                 return "@";
150             case PIPE:
151                 return "|";
152             case COLON:
153                 return ":";
154             case DOUBLE_COLON:
155                 return "::";
156             case LEFT_BRACKET:
157                 return "[";
158             case RIGHT_BRACKET:
159                 return "]";
160             case LEFT_PAREN:
161                 return "(";
162             case RIGHT_PAREN:
163                 return ")";
164             case DOLLAR:
165                 return "$";
166             case LITERAL:
167                 return "(literal)";
168             case AND:
169                 return "and";
170             case OR:
171                 return "or";
172             case DOUBLE:
173                 return "(double)";
174             case COMMA:
175                 return ",";
176             default:
177                 // This method is only called from an error handler, and only
178                 // to provide an exception message. In other words, the string
179                 // returned by this method is only used in an exception message.
180                 // Something has already gone wrong, and is being reported.
181                 // Thus there's no real reason to throw another exception here.
182                 // Just return a string and this message will be reported in an
183                 // exception anyway.
184                 return("Unrecognized token type: " + tokenType);
185         }
186     }
187 }