Class 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.

Keith Donald, Juergen Hoeller, Rossen Stoyanchev, Chris Beams
  • Constructor Details

    • FormattingConversionServiceFactoryBean

      public FormattingConversionServiceFactoryBean()
  • Method Details

    • setConverters

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

      public void setRegisterDefaultFormatters(boolean registerDefaultFormatters)
      Indicate 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:
    • 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
    • afterPropertiesSet

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

      This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

      Specified by:
      afterPropertiesSet in interface InitializingBean
    • 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>
      an instance of the bean (can be null)
      See Also:
    • 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>
      the type of object that this FactoryBean creates, or null if not known at the time of the call
      See Also:
    • 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.

      The default implementation returns true, since a FactoryBean typically manages a singleton instance.

      Specified by:
      isSingleton in interface FactoryBean<FormattingConversionService>
      whether the exposed object is a singleton
      See Also: