public class PayloadArgumentResolver extends Object implements HandlerMethodArgumentResolver
MessageConverter. It also validates the payload using a
Validator if the argument is annotated with a Validation annotation.
This HandlerMethodArgumentResolver should be ordered last as it supports all
types and does not require the Payload annotation.
| Constructor and Description |
|---|
PayloadArgumentResolver(MessageConverter messageConverter,
Validator validator) |
| Modifier and Type | Method and Description |
|---|---|
protected boolean |
isEmptyPayload(Object payload)
Specify if the given
payload is empty. |
Object |
resolveArgument(MethodParameter param,
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.
|
protected void |
validate(Message<?> message,
MethodParameter parameter,
Object target) |
public PayloadArgumentResolver(MessageConverter messageConverter, Validator validator)
public boolean supportsParameter(MethodParameter parameter)
HandlerMethodArgumentResolversupportsParameter in interface HandlerMethodArgumentResolverparameter - the method parameter to checktrue if this resolver supports the supplied parameter;
false otherwisepublic Object resolveArgument(MethodParameter param, Message<?> message) throws Exception
HandlerMethodArgumentResolverresolveArgument in interface HandlerMethodArgumentResolverparam - the method parameter to resolve. This parameter must
have previously been passed to
HandlerMethodArgumentResolver.supportsParameter(org.springframework.core.MethodParameter)
and it must have returned truemessage - 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)protected void validate(Message<?> message, MethodParameter parameter, Object target)