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Java > Open Source Codes > org > apache > tapestry > form > validator > MinDate


1 // Copyright 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.form.validator;
16
17 import java.util.Date JavaDoc;
18
19 import org.apache.tapestry.form.IFormComponent;
20 import org.apache.tapestry.form.ValidationMessages;
21 import org.apache.tapestry.valid.ValidationConstraint;
22 import org.apache.tapestry.valid.ValidationStrings;
23 import org.apache.tapestry.valid.ValidatorException;
24
25 /**
26  * Expects the value to be a {@link Date}, and constrains the date to follow a particular date.
27  *
28  * @author Howard M. Lewis Ship
29  * @since 4.0
30  */
31
32 public class MinDate extends BaseValidator
33 {
34     private Date JavaDoc _minDate;
35
36     public MinDate()
37     {
38     }
39
40     public MinDate(String JavaDoc initializer)
41     {
42         super(initializer);
43     }
44
45     public void setMinDate(Date JavaDoc minDate)
46     {
47         _minDate = minDate;
48     }
49
50     public void validate(IFormComponent field, ValidationMessages messages, Object JavaDoc object)
51             throws ValidatorException
52     {
53         Date JavaDoc date = (Date JavaDoc) object;
54
55         if (date.before(_minDate))
56             throw new ValidatorException(buildMessage(messages, field),
57                     ValidationConstraint.TOO_SMALL);
58     }
59
60     private String JavaDoc buildMessage(ValidationMessages messages, IFormComponent field)
61     {
62         return messages.formatValidationMessage(
63                 getMessage(),
64                 ValidationStrings.DATE_TOO_EARLY,
65                 new Object JavaDoc[]
66                 { field.getDisplayName(), _minDate });
67     }
68
69 }
70
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