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Java > Open Source Codes > org > apache > tapestry > valid > ValidationConstraint


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.valid;
16
17 import java.io.Serializable JavaDoc;
18
19 /**
20  * Defines an enumeration of different types of validation constraints that may be violated.
21  *
22  * @author Howard Lewis Ship
23  */
24
25 public class ValidationConstraint implements Serializable JavaDoc
26 {
27     private static final long serialVersionUID = 371593028205311930L;
28
29     /**
30      * Indicates that no value (or a value consisting only of white space) was provided for a field
31      * that requires a non-null value.
32      */
33
34     public static final ValidationConstraint REQUIRED = new ValidationConstraint("REQUIRED");
35
36     /**
37      * Indicates that a non-null value was provided, but that (after removing leading and trailing
38      * whitespace), the value was not long enough.
39      */
40
41     public static final ValidationConstraint MINIMUM_WIDTH = new ValidationConstraint(
42             "MINIMUM_WIDTH");
43
44     /**
45      * Indicates that a non-null value was provided, but that (after removing leading and trailing
46      * whitespace), the value was too long.
47      */
48
49     public static final ValidationConstraint MAXIMUM_WIDTH = new ValidationConstraint(
50             "MAXIMUM_WIDTH");
51
52     /**
53      * Indicates a general error in converting a String into a Date.
54      */
55
56     public static final ValidationConstraint DATE_FORMAT = new ValidationConstraint("DATE_FORMAT");
57
58     /**
59      * Indicates a general error in the format of a string that is to be interpreted as a email.
60      */
61
62     public static final ValidationConstraint EMAIL_FORMAT = new ValidationConstraint("EMAIL_FORMAT");
63
64     /**
65      * Indicates a general error in the format of a string that is to be interpreted as a number.
66      */
67
68     public static final ValidationConstraint NUMBER_FORMAT = new ValidationConstraint(
69             "NUMBER_FORMAT");
70
71     /**
72      * Indicates that the value was too small (for a Date, too early).
73      */
74
75     public static final ValidationConstraint TOO_SMALL = new ValidationConstraint("TOO_SMALL");
76
77     /**
78      * Indicates that the value was too large (for a Date, too late).
79      */
80
81     public static final ValidationConstraint TOO_LARGE = new ValidationConstraint("TOO_LARGE");
82
83     /**
84      * Indicates an error in a string that does not fulfill a pattern.
85      *
86      * @since 3.0
87      */
88
89     public static final ValidationConstraint PATTERN_MISMATCH = new ValidationConstraint(
90             "PATTERN_MISMATCH");
91
92     /**
93      * Indicates a consistency error, usually between too different fields.
94      *
95      * @since 3.0
96      */
97
98     public static final ValidationConstraint CONSISTENCY = new ValidationConstraint("CONSISTENCY");
99
100     /**
101      * Indicates that a URL is not of the correct format
102      *
103      * @since 3.0
104      */
105
106     public static final ValidationConstraint URL_FORMAT = new ValidationConstraint("URL_FORMAT");
107
108     /**
109      * Indicates that the URL does not use one of the specified protocols
110      *
111      * @since 3.0
112      */
113
114     public static final ValidationConstraint DISALLOWED_PROTOCOL = new ValidationConstraint(
115             "DISALLOWED_PROTOCOL");
116
117     private final String JavaDoc _name;
118
119     /**
120      * Protected constructor, which allows new constraints to be created as subclasses.
121      */
122
123     protected ValidationConstraint(String JavaDoc name)
124     {
125         _name = name;
126     }
127
128     public String JavaDoc toString()
129     {
130         return "ValidationConstraint[" + _name + "]";
131     }
132 }
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