org.springframework.expression.spel.support

Class StandardTypeConverter

java.lang.Object

org.springframework.expression.spel.support.StandardTypeConverter

All Implemented Interfaces:

TypeConverter

public class StandardTypeConverter
extends Object
implements TypeConverter

Default implementation of the TypeConverter interface, delegating to a core Spring ConversionService.

Since:

3.0

Author:

Juergen Hoeller, Andy Clement

See Also:

ConversionService

Constructor Summary

Constructors

Constructor and Description
StandardTypeConverter() Create a StandardTypeConverter for the default ConversionService.
StandardTypeConverter(ConversionService conversionService) Create a StandardTypeConverter for the given ConversionService.

Method Summary

Modifier and Type	Method and Description
boolean	canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) Return true if the type converter can convert the specified type to the desired target type.
Object	convertValue(Object value, TypeDescriptor sourceType, TypeDescriptor targetType) Convert (or coerce) a value from one type to another, for example from a boolean to a String.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardTypeConverter

public StandardTypeConverter()

Create a StandardTypeConverter for the default ConversionService.

See Also:

DefaultConversionService.getSharedInstance()

StandardTypeConverter

public StandardTypeConverter(ConversionService conversionService)

Create a StandardTypeConverter for the given ConversionService.

Parameters:

conversionService - the ConversionService to delegate to

Method Detail

canConvert

public boolean canConvert(@Nullable
                          TypeDescriptor sourceType,
                          TypeDescriptor targetType)

Description copied from interface: TypeConverter

Return true if the type converter can convert the specified type to the desired target type.

Specified by:

canConvert in interface TypeConverter

Parameters:

sourceType - a type descriptor that describes the source type

targetType - a type descriptor that describes the requested result type

Returns:

true if that conversion can be performed

convertValue

@Nullable
public Object convertValue(@Nullable
                                     Object value,
                                     @Nullable
                                     TypeDescriptor sourceType,
                                     TypeDescriptor targetType)

Description copied from interface: TypeConverter

Convert (or coerce) a value from one type to another, for example from a boolean to a String.

The TypeDescriptor parameters enable support for typed collections: A caller may prefer a List<Integer>, for example, rather than simply any List.

Specified by:

convertValue in interface TypeConverter

Parameters:

value - the value to be converted

sourceType - a type descriptor that supplies extra information about the source object

targetType - a type descriptor that supplies extra information about the requested result type

Returns:

the converted value