blob: 551d88c776a0d9d1f6399d7d841265511f3725b0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.data.validator;
import com.vaadin.data.Validator;
/**
* This validator is used for validating properties that do or do not allow null
* values. By default, nulls are not allowed.
*
* @author Vaadin Ltd.
* @version
* @VERSION@
* @since 3.0
*/
@SuppressWarnings("serial")
public class NullValidator implements Validator {
private boolean onlyNullAllowed;
private String errorMessage;
/**
* Creates a new NullValidator.
*
* @param errorMessage
* the error message to display on invalidation.
* @param onlyNullAllowed
* Are only nulls allowed?
*/
public NullValidator(String errorMessage, boolean onlyNullAllowed) {
setErrorMessage(errorMessage);
setNullAllowed(onlyNullAllowed);
}
/**
* Validates the data given in value.
*
* @param value
* the value to validate.
* @throws Validator.InvalidValueException
* if the value was invalid.
*/
@Override
public void validate(Object value) throws Validator.InvalidValueException {
if ((onlyNullAllowed && value != null)
|| (!onlyNullAllowed && value == null)) {
throw new Validator.InvalidValueException(errorMessage);
}
}
/**
* Returns <code>true</code> if nulls are allowed otherwise
* <code>false</code>.
*/
public final boolean isNullAllowed() {
return onlyNullAllowed;
}
/**
* Sets if nulls (and only nulls) are to be allowed.
*
* @param onlyNullAllowed
* If true, only nulls are allowed. If false only non-nulls are
* allowed. Do we allow nulls?
*/
public void setNullAllowed(boolean onlyNullAllowed) {
this.onlyNullAllowed = onlyNullAllowed;
}
/**
* Gets the error message that is displayed in case the value is invalid.
*
* @return the Error Message.
*/
public String getErrorMessage() {
return errorMessage;
}
/**
* Sets the error message to be displayed on invalid value.
*
* @param errorMessage
* the Error Message to set.
*/
public void setErrorMessage(String errorMessage) {
this.errorMessage = errorMessage;
}
}
|
