org.springframework.messaging.handler.invocation

public Interface HandlerMethodArgumentResolver

Known Direct Implementers: org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolverComposite, org.springframework.messaging.simp.annotation.support.PrincipalMethodArgumentResolver, org.springframework.messaging.handler.annotation.support.AbstractNamedValueMethodArgumentResolver, org.springframework.messaging.handler.annotation.support.HeadersMethodArgumentResolver, org.springframework.messaging.handler.annotation.support.MessageMethodArgumentResolver, org.springframework.messaging.handler.annotation.support.PayloadMethodArgumentResolver
Imports: org.springframework.core.MethodParameter, org.springframework.lang.Nullable, org.springframework.messaging.Message

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

Method Summary

Modifier and Type	Method and Description
public Object	Returns: the resolved argument value, or `null` resolveArgument(MethodParameter the method parameter to resolve. This parameter must have previously been passed to `supportsParameter(org.springframework.core.MethodParameter)` which must have returned `true`. parameter, Message<?> the currently processed message message) Resolves a method parameter into an argument value from a given message.
public boolean	Returns: `true` if this resolver supports the supplied parameter; `false` otherwise supportsParameter(MethodParameter the method parameter to check parameter) Whether the given method parameter is supported by this resolver.

resolveArgument back to summary

resolveArgument	back to summary
public Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception Resolves a method parameter into an argument value from a given message. Parameters parameter:MethodParameter the method parameter to resolve. This parameter must have previously been passed to `supportsParameter(org.springframework.core.MethodParameter)` which must have returned `true`. message:Message<?> the currently processed message Returns:Object the resolved argument value, or `null` Annotations @Nullable Exceptions Exception: in case of errors with the preparation of argument values

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

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

Parameters

parameter:MethodParameter: the method parameter to resolve. This parameter must have previously been passed to supportsParameter(org.springframework.core.MethodParameter) which must have returned true.
message:Message<?>: the currently processed message

Returns:Object

the resolved argument value, or null

Annotations

Exceptions

supportsParameter back to summary

supportsParameter	back to summary
public boolean supportsParameter(MethodParameter parameter) Whether the given method parameter is supported by this resolver. Parameters parameter:MethodParameter the method parameter to check Returns:boolean `true` if this resolver supports the supplied parameter; `false` otherwise

public boolean supportsParameter(MethodParameter parameter)

Whether the given method parameter is supported by this resolver.

Parameters

Returns:boolean

true if this resolver supports the supplied parameter; false otherwise