com.vaadin.ui.declarative.converters

Class DesignToStringConverter<TYPE>

java.lang.Object

com.vaadin.ui.declarative.converters.DesignToStringConverter<TYPE>

Type Parameters:

TYPE - Type of the data being converted.

All Implemented Interfaces:

Converter<String,TYPE>, Serializable

public class DesignToStringConverter<TYPE>
extends Object
implements Converter<String,TYPE>

Utility class for DesignAttributeHandler that deals with converting various types to string.

Since:

7.4

Author:

Vaadin Ltd

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	NULL_VALUE_REPRESENTATION A string that corresponds to how a null value is stored.

Constructor Summary

Constructors

Constructor and Description
DesignToStringConverter(Class<? extends TYPE> type) Constructs the converter for a given type.
DesignToStringConverter(Class<? extends TYPE> type, String staticMethodName) Constructs the converter for a given type, giving the name of the public static method that does the conversion from String.

Method Summary

Modifier and Type	Method and Description
Result<TYPE>	convertToModel(String value, ValueContext context) Converts the given value from model type to presentation type.
String	convertToPresentation(TYPE value, ValueContext context) Converts the given value from presentation type to model type.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.vaadin.data.Converter

chain, from, from, identity

Field Detail

NULL_VALUE_REPRESENTATION

public static final String NULL_VALUE_REPRESENTATION

A string that corresponds to how a null value is stored.

See Also:

Constant Field Values

Constructor Detail

DesignToStringConverter

public DesignToStringConverter(Class<? extends TYPE> type)

Constructs the converter for a given type. Implicitly requires that a static method valueOf(String) is present in the type to do the conversion.

Parameters:

type - Type of values to convert.

DesignToStringConverter

public DesignToStringConverter(Class<? extends TYPE> type,
                               String staticMethodName)

Constructs the converter for a given type, giving the name of the public static method that does the conversion from String.

Parameters:

type - Type to convert.

staticMethodName - Method to call when converting from String to this type. This must be public and static method that returns an object of passed type.

Method Detail

convertToModel

public Result<TYPE> convertToModel(String 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:

convertToModel in interface Converter<String,TYPE>

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

convertToPresentation

public String convertToPresentation(TYPE value,
                                    ValueContext context)

Description copied from interface: Converter

Converts the given value from presentation type to model type.

A converter can optionally use locale to do the conversion.

Specified by:

convertToPresentation in interface Converter<String,TYPE>

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