org.springframework.format.support
Class FormattingConversionServiceFactoryBean

java.lang.Object
  extended by org.springframework.format.support.FormattingConversionServiceFactoryBean
All Implemented Interfaces:
Aware, FactoryBean<FormattingConversionService>, InitializingBean, EmbeddedValueResolverAware

public class FormattingConversionServiceFactoryBean
extends Object
implements FactoryBean<FormattingConversionService>, EmbeddedValueResolverAware, InitializingBean

A factory providing convenient access to a FormattingConversionService configured with converters and formatters for common types such as numbers and datetimes.

Additional converters and formatters can be registered declaratively through setConverters(Set) and setFormatters(Set). Another option is to register converters and formatters in code by implementing the FormatterRegistrar interface. You can then configure provide the set of registrars to use through setFormatterRegistrars(Set).

A good example for registering converters and formatters in code is JodaTimeFormatterRegistrar, which registers a number of date-related formatters and converters. For a more detailed list of cases see setFormatterRegistrars(Set)

Like all FactoryBean implementations, this class is suitable for use when configuring a Spring application context using Spring <beans> XML. When configuring the container with @Configuration classes, simply instantiate, configure and return the appropriate FormattingConversionService object from a @Bean method.

Since:
3.0
Author:
Keith Donald, Juergen Hoeller, Rossen Stoyanchev, Chris Beams

Constructor Summary
FormattingConversionServiceFactoryBean()
           
 
Method Summary
 void afterPropertiesSet()
          Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
 FormattingConversionService getObject()
          Return an instance (possibly shared or independent) of the object managed by this factory.
 Class<? extends FormattingConversionService> getObjectType()
          Return the type of object that this FactoryBean creates, or null if not known in advance.
protected  void installFormatters(FormatterRegistry registry)
          Deprecated. since Spring 3.1 in favor of setFormatterRegistrars(Set)
 boolean isSingleton()
          Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?
 void setConverters(Set<?> converters)
          Configure the set of custom converter objects that should be added.
 void setEmbeddedValueResolver(StringValueResolver embeddedValueResolver)
          Set the StringValueResolver to use for resolving embedded definition values.
 void setFormatterRegistrars(Set<FormatterRegistrar> formatterRegistrars)
          Configure the set of FormatterRegistrars to invoke to register Converters and Formatters in addition to those added declaratively via setConverters(Set) and setFormatters(Set).
 void setFormatters(Set<?> formatters)
          Configure the set of custom formatter objects that should be added.
 void setRegisterDefaultFormatters(boolean registerDefaultFormatters)
          Indicates whether default formatters should be registered or not.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FormattingConversionServiceFactoryBean

public FormattingConversionServiceFactoryBean()
Method Detail

setConverters

public void setConverters(Set<?> converters)
Configure the set of custom converter objects that should be added.

Parameters:
converters - instances of any of the following: Converter, ConverterFactory, GenericConverter.

setFormatters

public void setFormatters(Set<?> formatters)
Configure the set of custom formatter objects that should be added.

Parameters:
formatters - instances of Formatter or AnnotationFormatterFactory.

setFormatterRegistrars

public void setFormatterRegistrars(Set<FormatterRegistrar> formatterRegistrars)

Configure the set of FormatterRegistrars to invoke to register Converters and Formatters in addition to those added declaratively via setConverters(Set) and setFormatters(Set).

FormatterRegistrars are useful when registering multiple related converters and formatters for a formatting category, such as Date formatting. All types related needed to support the formatting category can be registered from one place.

FormatterRegistrars can also be used to register Formatters indexed under a specific field type different from its own <T>, or when registering a Formatter from a Printer/Parser pair.

See Also:
FormatterRegistry.addFormatterForFieldType(Class, Formatter), FormatterRegistry.addFormatterForFieldType(Class, Printer, Parser)

setEmbeddedValueResolver

public void setEmbeddedValueResolver(StringValueResolver embeddedValueResolver)
Description copied from interface: EmbeddedValueResolverAware
Set the StringValueResolver to use for resolving embedded definition values.

Specified by:
setEmbeddedValueResolver in interface EmbeddedValueResolverAware

setRegisterDefaultFormatters

public void setRegisterDefaultFormatters(boolean registerDefaultFormatters)
Indicates whether default formatters should be registered or not. By default built-in formatters are registered. This flag can be used to turn that off and rely on explicitly registered formatters only.

See Also:
setFormatters(Set), setFormatterRegistrars(Set)

afterPropertiesSet

public void afterPropertiesSet()
Description copied from interface: InitializingBean
Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:
afterPropertiesSet in interface InitializingBean

getObject

public FormattingConversionService getObject()
Description copied from interface: FactoryBean
Return an instance (possibly shared or independent) of the object managed by this factory.

As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding FactoryBeanNotInitializedException.

As of Spring 2.0, FactoryBeans are allowed to return null objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.

Specified by:
getObject in interface FactoryBean<FormattingConversionService>
Returns:
an instance of the bean (can be null)
See Also:
FactoryBeanNotInitializedException

getObjectType

public Class<? extends FormattingConversionService> getObjectType()
Description copied from interface: FactoryBean
Return the type of object that this FactoryBean creates, or null if not known in advance.

This allows one to check for specific types of beans without instantiating objects, for example on autowiring.

In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:
getObjectType in interface FactoryBean<FormattingConversionService>
Returns:
the type of object that this FactoryBean creates, or null if not known at the time of the call
See Also:
ListableBeanFactory.getBeansOfType(java.lang.Class)

isSingleton

public boolean isSingleton()
Description copied from interface: FactoryBean
Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?

NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

Specified by:
isSingleton in interface FactoryBean<FormattingConversionService>
Returns:
whether the exposed object is a singleton
See Also:
FactoryBean.getObject(), SmartFactoryBean.isPrototype()

installFormatters

@Deprecated
protected void installFormatters(FormatterRegistry registry)
Deprecated. since Spring 3.1 in favor of setFormatterRegistrars(Set)

Subclasses may override this method to register formatters and/or converters. Starting with Spring 3.1 however the recommended way of doing that is to through FormatterRegistrars.

See Also:
setFormatters(Set), setFormatterRegistrars(Set)