public class MessageMethodArgumentResolver extends Object implements HandlerMethodArgumentResolver
HandlerMethodArgumentResolver
for Message
method arguments.
Validates that the generic type of the payload matches to the message value
or otherwise applies MessageConverter
to convert to the expected
payload type.Constructor and Description |
---|
MessageMethodArgumentResolver()
Create a default resolver instance without message conversion.
|
MessageMethodArgumentResolver(MessageConverter converter)
Create a resolver instance with the given
MessageConverter . |
Modifier and Type | Method and Description |
---|---|
protected boolean |
isEmptyPayload(Object payload)
Check if the given
payload is empty. |
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.
|
public MessageMethodArgumentResolver()
public MessageMethodArgumentResolver(MessageConverter converter)
MessageConverter
.converter
- the MessageConverter to use (may be null
)public boolean supportsParameter(MethodParameter parameter)
HandlerMethodArgumentResolver
supportsParameter
in interface HandlerMethodArgumentResolver
parameter
- the method parameter to checktrue
if this resolver supports the supplied parameter;
false
otherwisepublic Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception
HandlerMethodArgumentResolver
resolveArgument
in interface HandlerMethodArgumentResolver
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 messagenull
Exception
- in case of errors with the preparation of argument valuesprotected boolean isEmptyPayload(Object payload)
payload
is empty.payload
- the payload to check (can be null
)