org.springframework.messaging.handler.annotation.support

Class MessageMethodArgumentResolver

java.lang.Object

org.springframework.messaging.handler.annotation.support.MessageMethodArgumentResolver

All Implemented Interfaces:

HandlerMethodArgumentResolver

public class MessageMethodArgumentResolver
extends java.lang.Object
implements HandlerMethodArgumentResolver

A HandlerMethodArgumentResolver for Message parameters. Validates that the generic type of the payload matches with the message value.

Since:

4.0

Author:

Rossen Stoyanchev, Stephane Nicoll

Constructor Summary

Constructors

Constructor and Description
MessageMethodArgumentResolver()

Method Summary

Modifier and Type	Method and Description
private java.lang.Class<?>	getPayloadType(MethodParameter parameter)
java.lang.Object	resolveArgument(MethodParameter parameter, Message<?> message) Resolves a method parameter into an argument value from a given message.
boolean	supportsParameter(MethodParameter parameter) Whether the given method parameter is supported by this resolver.

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageMethodArgumentResolver

public MessageMethodArgumentResolver()

Method Detail

supportsParameter

public boolean supportsParameter(MethodParameter parameter)

Description copied from interface: HandlerMethodArgumentResolver

Whether the given method parameter is supported by this resolver.

Specified by:

supportsParameter in interface HandlerMethodArgumentResolver

Parameters:

parameter - the method parameter to check

Returns:

true if this resolver supports the supplied parameter; false otherwise

resolveArgument

public java.lang.Object resolveArgument(MethodParameter parameter,
                                        Message<?> message)
                                 throws java.lang.Exception

Description copied from interface: HandlerMethodArgumentResolver

Resolves a method parameter into an argument value from a given message.

Specified by:

resolveArgument in interface HandlerMethodArgumentResolver

Parameters:

parameter - the method parameter to resolve. This parameter must have previously been passed to HandlerMethodArgumentResolver.supportsParameter(org.springframework.core.MethodParameter) which must have returned true.

message - the currently processed message

Returns:

the resolved argument value, or null

Throws:

java.lang.Exception - in case of errors with the preparation of argument values

getPayloadType

private java.lang.Class<?> getPayloadType(MethodParameter parameter)