Package 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	Description
StandardTypeConverter()	Create a StandardTypeConverter for the default ConversionService.
StandardTypeConverter(Supplier<ConversionService> conversionService)	Create a StandardTypeConverter for the given ConversionService.
StandardTypeConverter(ConversionService conversionService)	Create a StandardTypeConverter for the given ConversionService.

Method Summary

Modifier and Type	Method	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 Details

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

StandardTypeConverter

public StandardTypeConverter(Supplier<ConversionService> conversionService)

Create a StandardTypeConverter for the given ConversionService.

Parameters:

conversionService - a Supplier for the ConversionService to delegate to

Since:

5.3.11

Method Details

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