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DelegatingMessageSource (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.context.support
Class DelegatingMessageSource

java.lang.Object
  org.springframework.context.support.DelegatingMessageSource

All Implemented Interfaces:

HierarchicalMessageSource, MessageSource

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public class DelegatingMessageSource
extends Object
implements HierarchicalMessageSource

Empty MessageSource that delegates all calls to the parent MessageSource. If no parent is available, it simply won't resolve any message.

Used as placeholder by AbstractApplicationContext, if the context doesn't define its own MessageSource. Not intended for direct use in applications.

Since:

1.1.5

Author:

Juergen Hoeller

See Also:

AbstractApplicationContext

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Constructor Summary
DelegatingMessageSource()

 

Method Summary
String	getMessage(MessageSourceResolvable resolvable, Locale locale)           Try to resolve the message using all the attributes contained within the MessageSourceResolvable argument that was passed in.
String	getMessage(String code, Object[] args, Locale locale)           Try to resolve the message.
String	getMessage(String code, Object[] args, String defaultMessage, Locale locale)           Try to resolve the message.
MessageSource	getParentMessageSource()           Return the parent of this MessageSource, or null if none.
void	setParentMessageSource(MessageSource parent)           Set the parent that will be used to try to resolve messages that this object can't resolve.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

DelegatingMessageSource

public DelegatingMessageSource()

Method Detail

setParentMessageSource

public void setParentMessageSource(MessageSource parent)

Description copied from interface: HierarchicalMessageSource

Set the parent that will be used to try to resolve messages that this object can't resolve.

Specified by:

setParentMessageSource in interface HierarchicalMessageSource

Parameters:

parent - the parent MessageSource that will be used to resolve messages that this object can't resolve. May be null, in which case no further resolution is possible.

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getParentMessageSource

public MessageSource getParentMessageSource()

Description copied from interface: HierarchicalMessageSource

Return the parent of this MessageSource, or null if none.

Specified by:

getParentMessageSource in interface HierarchicalMessageSource

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getMessage

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

Description copied from interface: MessageSource

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

Specified by:

getMessage in interface MessageSource

Parameters:

code - the 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.

defaultMessage - String to return if the lookup fails

locale - the Locale in which to do the lookup

Returns:

the resolved message if the lookup was successful; otherwise the default message passed as a parameter

See Also:

MessageFormat

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getMessage

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

Description copied from interface: MessageSource

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

Specified by:

getMessage in interface MessageSource

Parameters:

code - the 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 - the Locale in which to do the lookup

Returns:

the resolved message

Throws:

NoSuchMessageException - if the message wasn't found

See Also:

MessageFormat

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getMessage

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

Description copied from interface: MessageSource

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.

Specified by:

getMessage in interface MessageSource

Parameters:

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

locale - the Locale in which to do the lookup

Returns:

the resolved message

Throws:

NoSuchMessageException - if the message wasn't found

See Also:

MessageFormat

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