org.springframework.messaging.handler.invocation

Interface HandlerMethodArgumentResolver

All Known Implementing Classes:

AbstractNamedValueMethodArgumentResolver, DestinationVariableMethodArgumentResolver, HandlerMethodArgumentResolverComposite, HeaderMethodArgumentResolver, HeadersMethodArgumentResolver, MessageMethodArgumentResolver, PayloadArgumentResolver, PrincipalMethodArgumentResolver

public interface HandlerMethodArgumentResolver

Strategy interface for resolving method parameters into argument values in the context of a given Message.

Since:

4.0

Author:

Rossen Stoyanchev

Method Summary

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

Method Detail

supportsParameter

boolean supportsParameter(org.springframework.core.MethodParameter parameter)

Whether the given method parameter is supported by this resolver.

Parameters:

parameter - the method parameter to check

Returns:

true if this resolver supports the supplied parameter; false otherwise

resolveArgument

Object resolveArgument(org.springframework.core.MethodParameter parameter,
                       Message<?> message)
                throws Exception

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

Parameters:

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

message - the currently processed message

Returns:

the resolved argument value, or null

Throws:

Exception - in case of errors with the preparation of argument values