Module io.fluxzero.sdk
Package io.fluxzero.sdk.tracking.handling

Class PayloadParameterResolver

java.lang.Object
io.fluxzero.sdk.tracking.handling.PayloadParameterResolver
All Implemented Interfaces:
io.fluxzero.common.handling.ParameterResolver<HasMessage>
public class PayloadParameterResolver extends Object implements io.fluxzero.common.handling.ParameterResolver<HasMessage>
Resolves handler method parameters by injecting the message payload.

This resolver matches a parameter when its declared type is assignable from the actual payload class of the incoming message.

This resolver is typically used in conjunction with filters such as PayloadFilter to determine handler compatibility based on payload types.

Special care is taken to allow null payloads for parameters that are declared nullable, which can occur during upcasting or transformation pipelines.

See Also:

  • Constructor Details

    • PayloadParameterResolver

      public PayloadParameterResolver()

  • Method Details

    • matches

      public boolean matches(Parameter p, Annotation methodAnnotation, HasMessage value)
      Specified by:
      matches in interface io.fluxzero.common.handling.ParameterResolver<HasMessage>

    • resolve

      public Function<HasMessage,Object> resolve(Parameter p, Annotation methodAnnotation)
      Specified by:
      resolve in interface io.fluxzero.common.handling.ParameterResolver<HasMessage>

    • filterMessage

      public boolean filterMessage(HasMessage message, Parameter parameter)
      Specified by:
      filterMessage in interface io.fluxzero.common.handling.ParameterResolver<HasMessage>

    • determinesSpecificity

      public boolean determinesSpecificity()
      Indicates that this resolver contributes to disambiguating handler methods when multiple handlers are present in the same target class.

      This is useful when more than one method matches a message, and the framework must decide which method is more specific. If this returns true, the resolver's presence and compatibility with the parameter may influence which handler is selected.

      Specified by:
      determinesSpecificity in interface io.fluxzero.common.handling.ParameterResolver<HasMessage>
      Returns:
      true, signaling that this resolver helps determine method specificity