com.vaadin.data.util.converter

Class ConverterUtil

java.lang.Object

com.vaadin.data.util.converter.ConverterUtil

All Implemented Interfaces:

Serializable

public class ConverterUtil
extends Object
implements Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ConverterUtil()

Method Summary

Modifier and Type	Method and Description
static boolean	canConverterHandle(Converter<?,?> converter, Class<?> presentationType, Class<?> modelType) Checks if the given converter can handle conversion between the given presentation and model type.
static boolean	canConverterPossiblyHandle(Converter<?,?> converter, Class<?> presentationType, Class<?> modelType) Checks if it possible that the given converter can handle conversion between the given presentation and model type somehow.
static <PRESENTATIONTYPE,MODELTYPE> PRESENTATIONTYPE	convertFromModel(MODELTYPE modelValue, Class<? extends PRESENTATIONTYPE> presentationType, Converter<PRESENTATIONTYPE,MODELTYPE> converter, Locale locale) Convert the given value from the data source type to the UI type.
static <MODELTYPE,PRESENTATIONTYPE> MODELTYPE	convertToModel(PRESENTATIONTYPE presentationValue, Class<MODELTYPE> modelType, Converter<PRESENTATIONTYPE,MODELTYPE> converter, Locale locale) Convert the given value from the presentation (UI) type to model (data source) type.
static <PRESENTATIONTYPE,MODELTYPE> Converter<PRESENTATIONTYPE,MODELTYPE>	getConverter(Class<PRESENTATIONTYPE> presentationType, Class<MODELTYPE> modelType, VaadinSession session) Finds a converter that can convert from the given presentation type to the given model type and back.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConverterUtil

public ConverterUtil()

Method Detail

getConverter

public static <PRESENTATIONTYPE,MODELTYPE> Converter<PRESENTATIONTYPE,MODELTYPE> getConverter(Class<PRESENTATIONTYPE> presentationType,
                                                                                              Class<MODELTYPE> modelType,
                                                                                              VaadinSession session)

Finds a converter that can convert from the given presentation type to the given model type and back. Uses the given application to find a ConverterFactory or, if application is null, uses the VaadinSession.getCurrent().

Type Parameters:

PRESENTATIONTYPE - the presentation type

MODELTYPE - the model type

Parameters:

presentationType - the presentation type

modelType - the model type

session - the session to use to find a ConverterFactory or null to use the current session

Returns:

a Converter capable of converting between the given types or null if no converter was found

convertFromModel

public static <PRESENTATIONTYPE,MODELTYPE> PRESENTATIONTYPE convertFromModel(MODELTYPE modelValue,
                                                                             Class<? extends PRESENTATIONTYPE> presentationType,
                                                                             Converter<PRESENTATIONTYPE,MODELTYPE> converter,
                                                                             Locale locale)
                                                                      throws Converter.ConversionException

Convert the given value from the data source type to the UI type.

Type Parameters:

PRESENTATIONTYPE - the presentation type

MODELTYPE - the model type

Parameters:

modelValue - the model value to convert

presentationType - the type of the presentation value

converter - the converter to use

locale - the locale to use for conversion

Returns:

the converted value, compatible with the presentation type, or the original value if its type is compatible and no converter is set.

Throws:

Converter.ConversionException - if there was a problem converting the value

convertToModel

public static <MODELTYPE,PRESENTATIONTYPE> MODELTYPE convertToModel(PRESENTATIONTYPE presentationValue,
                                                                    Class<MODELTYPE> modelType,
                                                                    Converter<PRESENTATIONTYPE,MODELTYPE> converter,
                                                                    Locale locale)
                                                             throws Converter.ConversionException

Convert the given value from the presentation (UI) type to model (data source) type.

Type Parameters:

PRESENTATIONTYPE - the presentation type

MODELTYPE - the model type

Parameters:

presentationValue - the presentation value to convert

modelType - the type of the model

converter - the converter to use

locale - the locale to use for conversion

Returns:

the converted value, compatible with the model type, or the original value if its type is compatible and no converter is set.

Throws:

Converter.ConversionException - if there was a problem converting the value

canConverterHandle

public static boolean canConverterHandle(Converter<?,?> converter,
                                         Class<?> presentationType,
                                         Class<?> modelType)

Checks if the given converter can handle conversion between the given presentation and model type. Does strict type checking and only returns true if the converter claims it can handle exactly the given types.

Parameters:

converter - The converter to check. If this is null the result is always false.

presentationType - The presentation type

modelType - The model type

Returns:

true if the converter supports conversion between the given presentation and model type, false otherwise

See Also:

canConverterPossiblyHandle(Converter, Class, Class)

canConverterPossiblyHandle

public static boolean canConverterPossiblyHandle(Converter<?,?> converter,
                                                 Class<?> presentationType,
                                                 Class<?> modelType)

Checks if it possible that the given converter can handle conversion between the given presentation and model type somehow.

Parameters:

converter - The converter to check. If this is null the result is always false.

presentationType - The presentation type

modelType - The model type

Returns:

true if the converter possibly support conversion between the given presentation and model type, false otherwise