org.springframework.binding.convert.service

Class GenericConversionService

java.lang.Object

org.springframework.binding.convert.service.GenericConversionService

All Implemented Interfaces:

ConversionService

Direct Known Subclasses:

DefaultConversionService

public class GenericConversionService
extends java.lang.Object
implements ConversionService

Base implementation of a conversion service. Initially empty, e.g. no converters are registered by default.

Author:

Keith Donald

Constructor Summary

Constructors

Constructor and Description
GenericConversionService() Default constructor.
GenericConversionService(org.springframework.core.convert.ConversionService delegateConversionService) Constructor accepting a specific instance of a Spring ConversionService to delegate to.

Method Summary

Modifier and Type	Method and Description
void	addAlias(java.lang.String alias, java.lang.Class<?> targetType) Add an alias for given target type.
void	addConverter(Converter converter) Registers the given converter with the underlying Spring ConversionService with the help of an adapter.
void	addConverter(java.lang.String id, Converter converter) Add given custom converter to this conversion service.
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 name) 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.
ConversionService	getParent() Returns the parent of this conversion service.
void	setParent(ConversionService parent) Set the parent of this conversion service.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericConversionService

public GenericConversionService()

Default constructor.

GenericConversionService

public GenericConversionService(org.springframework.core.convert.ConversionService delegateConversionService)

Constructor accepting a specific instance of a Spring ConversionService to delegate to.

Parameters:

delegateConversionService - the conversion service

Method Detail

getParent

public ConversionService getParent()

Returns the parent of this conversion service. Could be null.

setParent

public void setParent(ConversionService parent)

Set the parent of this conversion service. This is optional.

getDelegateConversionService

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

Description copied from interface: ConversionService

Return the underlying Spring ConversionService.

Specified by:

getDelegateConversionService in interface ConversionService

Returns:

the Spring ConverterRegistry

addConverter

public void addConverter(Converter converter)

Registers the given converter with the underlying Spring ConversionService with the help of an adapter. The adapter allows an existing Spring Binding converter to be invoked within Spring's type conversion system.

Parameters:

converter - the converter

See Also:

ConverterRegistry, ConversionService, SpringBindingConverterAdapter

addConverter

public void addConverter(java.lang.String id,
                         Converter converter)

Add given custom converter to this conversion service. Note: Converters registered through this method will not be involve the Spring type conversion system, which is now used the default type conversion mechanism. Spring's type conversion does not support named converters. This method is provided for backwards compatibility.

Parameters:

id - the id of the custom converter instance

converter - the converter

addAlias

public void addAlias(java.lang.String alias,
                     java.lang.Class<?> targetType)

Add an alias for given target type.

getConversionExecutor

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

Description copied from interface: ConversionService

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.

Specified by:

getConversionExecutor in interface ConversionService

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

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

Description copied from interface: ConversionService

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.

Specified by:

getConversionExecutor in interface ConversionService

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

executeConversion

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

Description copied from interface: ConversionService

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

Specified by:

executeConversion in interface ConversionService

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

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

Description copied from interface: ConversionService

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

Specified by:

executeConversion in interface ConversionService

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

getClassForAlias

public java.lang.Class<?> getClassForAlias(java.lang.String name)
                                    throws java.lang.IllegalArgumentException

Description copied from interface: ConversionService

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

Specified by:

getClassForAlias in interface ConversionService

Parameters:

name - the class alias

Returns:

the class, or null if no alias exists

Throws:

java.lang.IllegalArgumentException