1 /*
2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/saxpath/Operator.java,v 1.4 2005/06/28 13:44:46 elharo Exp $
3 * $Revision: 1.4 $
4 * $Date: 2005/06/28 13:44:46 $
5 *
6 * ====================================================================
7 *
8 * Copyright (C) 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
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer.
17 *
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions, and the disclaimer that follows
20 * these conditions in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * 3. The name "Jaxen" must not be used to endorse or promote products
24 * derived from this software without prior written permission. For
25 * written permission, please contact license@jaxen.org.
26 *
27 * 4. Products derived from this software may not be called "Jaxen", nor
28 * may "Jaxen" appear in their name, without prior written permission
29 * from the Jaxen Project Management (pm@jaxen.org).
30 *
31 * In addition, we request (but do not require) that you include in the
32 * end-user documentation provided with the redistribution and/or in the
33 * software itself an acknowledgement equivalent to the following:
34 * "This product includes software developed by the
35 * Jaxen Project <http://www.jaxen.org/>."
36 * Alternatively, the acknowledgment may be graphical using the logos
37 * available at http://www.jaxen.org/
38 *
39 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42 * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
43 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * ====================================================================
53 * This software consists of voluntary contributions made by many
54 * individuals on behalf of the Jaxen Project and was originally
55 * created by bob mcwhirter <bob@werken.com> and
56 * James Strachan <jstrachan@apache.org>. For more information on the
57 * Jaxen Project, please see <http://www.jaxen.org/>.
58 *
59 * $Id: Operator.java,v 1.4 2005/06/28 13:44:46 elharo Exp $
60 */
61
62 package org.jaxen.saxpath;
63
64 /***
65 * Constants used to represent XPath operators.
66 */
67 public interface Operator
68 {
69 /***
70 * Indicates that we're passing through a grammar production without
71 * actually activating it. For example in the expression
72 * <code>1</code> is matches AdditiveExpr and MultiplicativeExpr in
73 * the XPath grammar, even though it has neither a plus,
74 * minus, multiplication, or other sign.
75 */
76 final static int NO_OP = 0;
77
78 // Equality
79 /***
80 * The equal to operator <code>=</code>. This is equivalent to <code>==</code>
81 * in Java. This is a comparison operator, not an assignment operator.
82 */
83 final static int EQUALS = 1;
84
85 /***
86 * The not equal to operator <code>!=</code>
87 */
88 final static int NOT_EQUALS = 2;
89
90 // Relational
91 /***
92 * The less-than operator <code><</code>
93 */
94 final static int LESS_THAN = 3;
95
96 /***
97 * The less-than-or-equal-to operator <code><=</code>
98 */
99 final static int LESS_THAN_EQUALS = 4;
100
101 /***
102 * The greater-than operator <code>></code>
103 */
104 final static int GREATER_THAN = 5;
105
106 /***
107 * The greater-than or equals operator <code>>=</code>
108 */
109 final static int GREATER_THAN_EQUALS = 6;
110
111 // Additive
112
113 /***
114 * The addition operator <code>+</code>
115 */
116 final static int ADD = 7;
117
118 /***
119 * The subtraction operator <code>-</code>
120 */
121 final static int SUBTRACT = 8;
122
123 // Multiplicative
124
125 /***
126 * The multiplication operator <code>*</code>
127 */
128 final static int MULTIPLY = 9;
129
130 /***
131 * The remainder operator <code>mod</code>. This is equivalent to
132 * <code>%</code> in Java.
133 */
134 final static int MOD = 10;
135
136 /***
137 * The floating point division operator <code>div</code>. This is equivalent to
138 * <code>/</code> in Java.
139 */
140 final static int DIV = 11;
141
142 // Unary
143
144 /***
145 * Unary <code>-</code>
146 */
147 final static int NEGATIVE = 12;
148 }