com.sap.cds.services.impl.handlerregistry.resolver

Class EventContextArgumentResolver

java.lang.Object

com.sap.cds.services.impl.handlerregistry.resolver.EventContextArgumentResolver

All Implemented Interfaces:

ArgumentResolver

public class EventContextArgumentResolver
extends Object
implements ArgumentResolver

Handles all types of EventContext based arguments in handler methods

Method Summary

Modifier and Type	Method and Description
static EventContextArgumentResolver	createIfApplicable(Class<?> type) Returns a EventContextArgumentResolver, if the given type is an EventContext
String[]	indicateEvents()
Object	resolve(EventContext context) Finds an argument value on the given EventContext
void	verifyOrThrow(HandlerDescriptor descriptor) Does basic checks if the EventContext parameter of the given MethodHandle matches the registered event(s).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.sap.cds.services.impl.handlerregistry.resolver.ArgumentResolver

indicateEntities

Method Detail

createIfApplicable

public static EventContextArgumentResolver createIfApplicable(Class<?> type)

Returns a EventContextArgumentResolver, if the given type is an EventContext

Parameters:

type - the type

Returns:

a EventContextArgumentResolver, if the given type is an EventContext

resolve

public Object resolve(EventContext context)

Description copied from interface: ArgumentResolver

Finds an argument value on the given EventContext

Specified by:

resolve in interface ArgumentResolver

Parameters:

context - the EventContext currently processed

Returns:

the determined argument value

verifyOrThrow

public void verifyOrThrow(HandlerDescriptor descriptor)

Does basic checks if the EventContext parameter of the given MethodHandle matches the registered event(s). A specified EventContext parameter must have a EventName annotation which matches exactly the event of the Handler annotations.

Specified by:

verifyOrThrow in interface ArgumentResolver

Parameters:

descriptor - The descriptor to be checked

indicateEvents

public String[] indicateEvents()

Specified by:

indicateEvents in interface ArgumentResolver

Returns:

an array of indicated events, that can be used if the handler does not specify events in their annotation