= ActionDomainEvent
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Fired whenever the framework interacts with a domain object's action.

This is the specialization of xref:refguide:applib:index/events/domain/AbstractDomainEvent.adoc[AbstractDomainEvent] , for actions, which should then be further subclassed by domain application.

The class has a number of responsibilities (in addition to those it inherits):

* capture the arguments for each of the action's parameters
* provide selected metadata about the action parameters from the metamodel (names, types)

The class itself is instantiated automatically by the framework using a no-arg constructor; fields are set reflectively.

== API

[source,java]
.ActionDomainEvent.java
----
class ActionDomainEvent<S> {
  ActionDomainEvent()     // <.>
  ActionDomainEvent(S source)     // <.>
  void setReturnValue(Object returnValue)     // <.>
  void setSemantics(SemanticsOf semantics)     // <.>
  void setParameterNames(List<String> parameterNames)     // <.>
  void setParameterTypes(List<Class<?>> parameterTypes)     // <.>
  void setMixedIn(Object mixedIn)     // <.>
  String toString()
}
----

<.> xref:#ActionDomainEvent_[ActionDomainEvent()]
+
--
Subtypes can define a no-arg constructor; the framework sets state via (non-API) setters.
--
<.> xref:#ActionDomainEvent_S[ActionDomainEvent(S)]
+
--
Subtypes can define a one-arg constructor; the framework sets state via (non-API) setters.
--
<.> xref:#setReturnValue_Object[setReturnValue(Object)]
+
--
Set by the framework.
--
<.> xref:#setSemantics_SemanticsOf[setSemantics(SemanticsOf)]
<.> xref:#setParameterNames_List[setParameterNames(List)]
<.> xref:#setParameterTypes_List[setParameterTypes(List)]
<.> xref:#setMixedIn_Object[setMixedIn(Object)]

== Members

[#ActionDomainEvent_]
=== ActionDomainEvent()

Subtypes can define a no-arg constructor; the framework sets state via (non-API) setters.

[#ActionDomainEvent_S]
=== ActionDomainEvent(S)

Subtypes can define a one-arg constructor; the framework sets state via (non-API) setters.

A one-arg constructor is particularly useful in the context of non-static DomainEvent class nesting.

[#setReturnValue_Object]
=== setReturnValue(Object)

Set by the framework.

Event subscribers can replace the value with some other value if they wish, though only in the _AbstractDomainEvent.Phase#EXECUTED_ phase.

[#setSemantics_SemanticsOf]
=== setSemantics(SemanticsOf)

[#setParameterNames_List]
=== setParameterNames(List)

[#setParameterTypes_List]
=== setParameterTypes(List)

[#setMixedIn_Object]
=== setMixedIn(Object)
