org.springframework.context
Interface MessageSource

All Known Subinterfaces:

ApplicationContext, ConfigurableApplicationContext, ConfigurableWebApplicationContext, NestingMessageSource, WebApplicationContext

public interface MessageSource

Interface to be implemented by objects that can resolve messages. This enables parameterization and internationalization of messages.

Spring provides two out-of-the-box implementations for production:

• ResourceBundleMessageSource, built on standard java.util.ResourceBundle
• ReloadableResourceBundleMessageSource, being able to reload message definitions without restarting the VM

Author:

Rod Johnson

See Also: ResourceBundleMessageSource, ReloadableResourceBundleMessageSource

public String getMessage(String code, Object[] args, String defaultMessage, Locale locale)

Try to resolve the message. Return default message if no message was found.

Parameters:

code - code to lookup up, such as 'calculator.noRateSet'. Users of this class are encouraged to base message names on the relevant fully qualified class name, thus avoiding conflict and ensuring maximum clarity.

args - array of arguments that will be filled in for params within the message (params look like "{0}", "{1,date}", "{2,time}" within a message), or null if none.

locale - the Locale in which to do lookup

defaultMessage - String to return if the lookup fails

Returns: the resolved message if the lookup is successful; otherwise the default message passed as a parameter

See Also:

java.text.MessageFormat

public String getMessage(String code, Object[] args, Locale locale)
                   throws NoSuchMessageException

Try to resolve the message. Treat as an error if the message can't be found.

Parameters:

code - code to lookup up, such as 'calculator.noRateSet'

args - Array of arguments that will be filled in for params within the message (params look like "{0}", "{1,date}", "{2,time}" within a message), or null if none.

locale - Locale in which to do lookup

Returns: the resolved message

Throws:

NoSuchMessageException - if not found in any locale

See Also:

java.text.MessageFormat

public String getMessage(MessageSourceResolvable resolvable, Locale locale)
                   throws NoSuchMessageException

Try to resolve the message using all the attributes contained within the MessageSourceResolvable argument that was passed in.

NOTE: We must throw a NoSuchMessageException on this method since at the time of calling this method we aren't able to determine if the defaultMessage property of the resolvable is null or not.

Parameters:

resolvable - value object storing attributes required to properly resolve a message

locale - Locale to be used as the "driver" to figuring out what message to return

Returns: the resolved message

Throws:

NoSuchMessageException - if not found in any locale

See Also:

java.text.MessageFormat