org.springframework.binding.convert

Interface ConversionService

All Known Implementing Classes:

DefaultConversionService, FacesConversionService, GenericConversionService

public interface ConversionService

A service interface for retrieving type conversion executors. The returned command objects are thread-safe and may be safely cached for use by client code. Type converters convert from one type to another.

Author:

Keith Donald

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	executeConversion(java.lang.Object source, java.lang.Class<?> targetClass) Execute a conversion of the source object provided to the specified targetClass
java.lang.Object	executeConversion(java.lang.String converterId, java.lang.Object source, java.lang.Class<?> targetClass) Execute a conversion using the custom converter with the provided id.
java.lang.Class<?>	getClassForAlias(java.lang.String alias) Lookup a class by its well-known alias.
ConversionExecutor	getConversionExecutor(java.lang.Class<?> sourceClass, java.lang.Class<?> targetClass) Return the default conversion executor capable of converting source objects of the specified sourceClass to instances of the targetClass.
ConversionExecutor	getConversionExecutor(java.lang.String id, java.lang.Class<?> sourceClass, java.lang.Class<?> targetClass) Return the custom conversion executor capable of converting source objects of the specified sourceClass to instances of the targetClass.
org.springframework.core.convert.ConversionService	getDelegateConversionService() Return the underlying Spring ConversionService.

Method Detail

executeConversion

java.lang.Object executeConversion(java.lang.Object source,
                                 java.lang.Class<?> targetClass)
                                   throws ConversionException

Execute a conversion of the source object provided to the specified targetClass

Parameters:

source - the source to convert from (may be null)

targetClass - the target class to convert to

Returns:

the converted object, an instance of the targetClass

Throws:

ConversionException - if an exception occurred during the conversion process

executeConversion

java.lang.Object executeConversion(java.lang.String converterId,
                                 java.lang.Object source,
                                 java.lang.Class<?> targetClass)

Execute a conversion using the custom converter with the provided id.

Parameters:

converterId - the id of the custom converter, which must be registered with this conversion service and capable of converting to the target class

source - the source to convert from (may be null)

targetClass - the target class to convert to

Returns:

the converted object, an instance of the targetClass

Throws:

ConversionException - if an exception occurred during the conversion process

getConversionExecutor

ConversionExecutor getConversionExecutor(java.lang.Class<?> sourceClass,
                                       java.lang.Class<?> targetClass)
                                         throws ConversionExecutorNotFoundException

Return the default conversion executor capable of converting source objects of the specified sourceClass to instances of the targetClass.

The returned ConversionExecutor is thread-safe and may safely be cached for use in client code.

Parameters:

sourceClass - the source class to convert from (required)

targetClass - the target class to convert to (required)

Returns:

the executor that can execute instance type conversion, never null

Throws:

ConversionExecutorNotFoundException - when no suitable conversion executor could be found

getConversionExecutor

ConversionExecutor getConversionExecutor(java.lang.String id,
                                       java.lang.Class<?> sourceClass,
                                       java.lang.Class<?> targetClass)
                                         throws ConversionExecutorNotFoundException

Return the custom conversion executor capable of converting source objects of the specified sourceClass to instances of the targetClass.

The returned ConversionExecutor is thread-safe and may safely be cached for use in client code.

Parameters:

id - the id of the custom conversion executor (required)

sourceClass - the source class to convert from (required)

targetClass - the target class to convert to (required)

Returns:

the executor that can execute instance type conversion, never null

Throws:

ConversionExecutorNotFoundException - when no suitable conversion executor could be found

getClassForAlias

java.lang.Class<?> getClassForAlias(java.lang.String alias)

Lookup a class by its well-known alias. For example, long for java.lang.Long

Parameters:

alias - the class alias

Returns:

the class, or null if no alias exists

getDelegateConversionService

org.springframework.core.convert.ConversionService getDelegateConversionService()

Return the underlying Spring ConversionService.

Returns:

the conversion service