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Java > Open Source Codes > org > jaxen > saxpath > Operator


1 /*
2  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/saxpath/Operator.java,v 1.3 2005/06/14 13:57:35 elharo Exp $
3  * $Revision: 1.3 $
4  * $Date: 2005/06/14 13:57:35 $
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 1.3 2005/06/14 13:57:35 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>&lt;</code>
93      */
94     final static int LESS_THAN = 3;
95     
96     /**
97      * The less-than-or-equal-to operator <code>&lt;=</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 }
149
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