gate.creole.metadata

Annotation Type Optional

@Documented
 @Target(value={METHOD,FIELD})
 @Retention(value=RUNTIME)
public @interface Optional

Marker annotation used in conjunction with CreoleParameter to mark parameters that are optional.

 @Optional
 @CreoleParameter
 public void setAnnotationTypes(List<String> types) { ... }
 

While usually used to mark parameters as optional, this annotation also supports an optional boolean flag, so it can be used as @Optional(false) to mark required parameters. This is not generally necessary, as parameters are required by default, however if a given parameter has been annotated as @Optional in a superclass this will be inherited. If you want to change the parameter to be required in a subclass then you must use @Optional(false).

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
boolean	value Defaults to true but can be set to false to explicitly mark a parameter as required rather than optional.

Element Detail

value

public abstract boolean value

Defaults to true but can be set to false to explicitly mark a parameter as required rather than optional.

Default:

true