Package com.vaadin.data.util.converter

Class ReverseConverter<PRESENTATION,MODEL>

java.lang.Object

com.vaadin.data.util.converter.ReverseConverter<PRESENTATION,MODEL>

Type Parameters:

MODEL - The source type

PRESENTATION - The target type

All Implemented Interfaces:

Converter<PRESENTATION,MODEL>, Serializable

public class ReverseConverter<PRESENTATION,MODEL>
extends Object
implements Converter<PRESENTATION,MODEL>

A converter that wraps another Converter and reverses source and target types.

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

Constructors

Constructor	Description
ReverseConverter(Converter<MODEL,PRESENTATION> converter)	Creates a converter from source to target based on a converter that converts from target to source.

Method Summary

Modifier and Type	Method	Description
MODEL	convertToModel(PRESENTATION value, Class<? extends MODEL> targetType, Locale locale)	Converts the given value from target type to source type.
PRESENTATION	convertToPresentation(MODEL value, Class<? extends PRESENTATION> targetType, Locale locale)	Converts the given value from source type to target type.
Class<MODEL>	getModelType()	The source type of the converter.
Class<PRESENTATION>	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

ReverseConverter

public ReverseConverter(Converter<MODEL,PRESENTATION> converter)

Creates a converter from source to target based on a converter that converts from target to source.

Parameters:

converter - The converter to use in a reverse fashion

Method Detail

convertToModel

public MODEL convertToModel(PRESENTATION value,
                            Class<? extends MODEL> targetType,
                            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, Class, Locale) and Converter.convertToModel(Object, Class, Locale) should return the original value.

Specified by:

convertToModel in interface Converter<PRESENTATION,MODEL>

Parameters:

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

targetType - The requested type of the return value

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 PRESENTATION convertToPresentation(MODEL value,
                                          Class<? extends PRESENTATION> targetType,
                                          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, Class, Locale) and Converter.convertToModel(Object, Class, Locale) should return the original value.

Specified by:

convertToPresentation in interface Converter<PRESENTATION,MODEL>

Parameters:

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

targetType - The requested type of the return value

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 Class<MODEL> getModelType()

Description copied from interface: Converter

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

Specified by:

getModelType in interface Converter<PRESENTATION,MODEL>

Returns:

The source type

getPresentationType

public Class<PRESENTATION> getPresentationType()

Description copied from interface: Converter

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

Specified by:

getPresentationType in interface Converter<PRESENTATION,MODEL>

Returns:

The target type