com.vaadin.data.util.converter
Class StringToDoubleConverter

java.lang.Object
  com.vaadin.data.util.converter.StringToDoubleConverter

All Implemented Interfaces:

Converter<java.lang.String,java.lang.Double>, java.io.Serializable

public class StringToDoubleConverter
extends java.lang.Object
implements Converter<java.lang.String,java.lang.Double>

A converter that converts from String to Double and back. Uses the given locale and a NumberFormat instance for formatting and parsing.

Leading and trailing white spaces are ignored when converting from a String.

Override and overwrite getFormat(Locale) to use a different format.

Since:

7.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.data.util.converter.Converter

Converter.ConversionException

Constructor Summary

StringToDoubleConverter()

Method Summary

java.lang.Double	convertToModel(java.lang.String value, java.util.Locale locale) Converts the given value from target type to source type.
java.lang.String	convertToPresentation(java.lang.Double value, java.util.Locale locale) Converts the given value from source type to target type.
protected java.text.NumberFormat	getFormat(java.util.Locale locale) Returns the format used by convertToPresentation(Double, Locale) and convertToModel(String, Locale).
java.lang.Class<java.lang.Double>	getModelType() The source type of the converter.
java.lang.Class<java.lang.String>	getPresentationType() The target type of the converter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StringToDoubleConverter

public StringToDoubleConverter()

Method Detail

getFormat

protected java.text.NumberFormat getFormat(java.util.Locale locale)

Returns the format used by convertToPresentation(Double, Locale) and convertToModel(String, Locale).

Parameters:

locale - The locale to use

Returns:

A NumberFormat instance

convertToModel

public java.lang.Double convertToModel(java.lang.String value,
                                       java.util.Locale locale)
                                throws Converter.ConversionException

Description copied from interface: Converter

Converts the given value from target type to source type.

A converter can optionally use locale to do the conversion.

A converter should in most cases be symmetric so chaining Converter.convertToPresentation(Object, Locale) and Converter.convertToModel(Object, Locale) should return the original value.

Specified by:

convertToModel in interface Converter<java.lang.String,java.lang.Double>

Parameters:

value - The value to convert, compatible with the target type. Can be null

locale - The locale to use for conversion. Can be null.

Returns:

The converted value compatible with the source type

Throws:

Converter.ConversionException - If the value could not be converted

convertToPresentation

public java.lang.String convertToPresentation(java.lang.Double value,
                                              java.util.Locale locale)
                                       throws Converter.ConversionException

Description copied from interface: Converter

Converts the given value from source type to target type.

A converter can optionally use locale to do the conversion.

A converter should in most cases be symmetric so chaining Converter.convertToPresentation(Object, Locale) and Converter.convertToModel(Object, Locale) should return the original value.

Specified by:

convertToPresentation in interface Converter<java.lang.String,java.lang.Double>

Parameters:

value - The value to convert, compatible with the target type. Can be null

locale - The locale to use for conversion. Can be null.

Returns:

The converted value compatible with the source type

Throws:

Converter.ConversionException - If the value could not be converted

getModelType

public java.lang.Class<java.lang.Double> getModelType()

Description copied from interface: Converter

The source type of the converter. Values of this type can be passed to Converter.convertToPresentation(Object, Locale).

Specified by:

getModelType in interface Converter<java.lang.String,java.lang.Double>

Returns:

The source type

getPresentationType

public java.lang.Class<java.lang.String> getPresentationType()

Description copied from interface: Converter

The target type of the converter. Values of this type can be passed to Converter.convertToModel(Object, Locale).

Specified by:

getPresentationType in interface Converter<java.lang.String,java.lang.Double>

Returns:

The target type