blob: 840f6ae8c0d7a0c682afad1cdd2d8c47a08ce87c (
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
93
94
95
96
|
/*
* Copyright 2000-2016 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.data.converter;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
/**
* A converter that converts from {@link String} to {@link BigInteger} and back.
* Uses the given locale and a {@link NumberFormat} instance for formatting and
* parsing.
* <p>
* Leading and trailing white spaces are ignored when converting from a String.
* </p>
* <p>
* Override and overwrite {@link #getFormat(Locale)} to use a different format.
* </p>
*
* @author Vaadin Ltd
* @since 8.0
*/
public class StringToBigIntegerConverter
extends AbstractStringToNumberConverter<BigInteger> {
/**
* Creates a new converter instance with the given error message. Empty
* strings are converted to <code>null</code>.
*
* @param errorMessage
* the error message to use if conversion fails
*/
public StringToBigIntegerConverter(String errorMessage) {
this(null, errorMessage);
}
/**
* Creates a new converter instance with the given empty string value and
* error message.
*
* @param emptyValue
* the presentation value to return when converting an empty
* string, may be <code>null</code>
* @param errorMessage
* the error message to use if conversion fails
*/
public StringToBigIntegerConverter(BigInteger emptyValue,
String errorMessage) {
super(emptyValue, errorMessage);
}
@Override
protected NumberFormat getFormat(Locale locale) {
NumberFormat numberFormat = super.getFormat(locale);
if (numberFormat instanceof DecimalFormat) {
((DecimalFormat) numberFormat).setParseBigDecimal(true);
}
return numberFormat;
}
@Override
public Result<BigInteger> convertToModel(String value,
ValueContext context) {
return convertToNumber(value, context.getLocale().orElse(null))
.map(number -> {
if (number == null) {
return null;
}
// Empty value will be a BigInteger
if (number instanceof BigInteger) {
return (BigInteger) number;
}
return ((BigDecimal) number).toBigInteger();
});
}
}
|
