com.vaadin.flow.data.converter.

java.lang.Object
- com.vaadin.flow.data.converter.AbstractStringToNumberConverter<T>

Type Parameters:

T - the converter number type

All Implemented Interfaces:

Converter<String,T>, Serializable

Direct Known Subclasses:

StringToBigDecimalConverter, StringToBigIntegerConverter, StringToDoubleConverter, StringToFloatConverter, StringToIntegerConverter, StringToLongConverter
```
public abstract class AbstractStringToNumberConverter<T extends Number>
extends Object
implements Converter<String,T>
```
A converter that converts from the number type T to String and back. Uses the given locale and NumberFormat for formatting and parsing. Automatically trims the input string, removing any leading and trailing white space.
Override and overwrite getFormat(Locale) to use a different format.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`AbstractStringToNumberConverter(T emptyValue, ErrorMessageProvider errorMessageProvider)`	Creates a new converter instance with the given presentation value for empty string and error message provider.
`protected`	`AbstractStringToNumberConverter(T emptyValue, String errorMessage)`	Creates a new converter instance with the given presentation value for empty string and error message.

Method Summary

All Methods
Modifier and Type	Method	Description
`protected Result<Number>`	`convertToNumber(String value, ValueContext context)`	Convert the value to a Number using the given locale and `getFormat(Locale)`.
`String`	`convertToPresentation(T value, ValueContext context)`	Converts the given value from model type to presentation type.
`protected String`	`getErrorMessage(ValueContext context)`	Gets the error message to use when conversion fails.
`protected NumberFormat`	`getFormat(Locale locale)`	Returns the format used by `Converter.convertToPresentation(Object, ValueContext)` and `Converter.convertToModel(Object, ValueContext)`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.flow.data.converter.Converter
chain, convertToModel

- Constructor Detail
  - AbstractStringToNumberConverter
```
protected AbstractStringToNumberConverter(T emptyValue,
                                          ErrorMessageProvider errorMessageProvider)
```
    Creates a new converter instance with the given presentation value for empty string and error message provider.
    
    Parameters:
    
    emptyValue - the presentation value to return when converting an empty string, may be null
    
    errorMessageProvider - the error message provider to use if conversion fails
  - AbstractStringToNumberConverter
```
protected AbstractStringToNumberConverter(T emptyValue,
                                          String errorMessage)
```
    Creates a new converter instance with the given presentation value for empty string and error message.
    
    Parameters:
    
    emptyValue - the presentation value to return when converting an empty string, may be null
    
    errorMessage - the error message to use if conversion fails
- Method Detail
  - getFormat
```
protected NumberFormat getFormat(Locale locale)
```
    Returns the format used by Converter.convertToPresentation(Object, ValueContext) and Converter.convertToModel(Object, ValueContext).
    
    Parameters:
    
    locale - The locale to use
    
    Returns:
    
    A NumberFormat instance
  - convertToNumber
```
protected Result<Number> convertToNumber(String value,
                                         ValueContext context)
```
    Convert the value to a Number using the given locale and getFormat(Locale).
    
    Parameters:
    
    value - The value to convert
    
    context - The value context for conversion
    
    Returns:
    
    The converted value
  - getErrorMessage
```
protected String getErrorMessage(ValueContext context)
```
    Gets the error message to use when conversion fails.
    
    Parameters:
    
    context - The value context for generating the error message
    
    Returns:
    
    the error message
  - convertToPresentation
```
public String convertToPresentation(T value,
                                    ValueContext context)
```
    Description copied from interface: Converter
    
    Converts the given value from model type to presentation type.
    A converter can optionally use locale to do the conversion.
    
    Specified by:
    
    convertToPresentation in interface Converter<String,T extends Number>
    
    Parameters:
    
    value - The value to convert. Can be null
    
    context - The value context for the conversion.
    
    Returns:
    
    The converted value compatible with the source type

com.vaadin.flow.data.converter.

Class AbstractStringToNumberConverter<T extends Number>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface com.vaadin.flow.data.converter.Converter

Constructor Detail

AbstractStringToNumberConverter

AbstractStringToNumberConverter

Method Detail

getFormat

convertToNumber

getErrorMessage

convertToPresentation