com.google.inject.multibindings

Annotation Type ProvidesIntoOptional

@Documented
@Target(value=METHOD)
@Retention(value=RUNTIME)
public @interface ProvidesIntoOptional

Annotates methods of a Module to add items to a Multibinder. The method's return type and binding annotation determines what Optional this will contribute to. For example,

 @ProvidesIntoOptional(DEFAULT)
 @Named("url")
 String provideFooUrl(FooManager fm) { returm fm.getUrl(); }

 @ProvidesIntoOptional(ACTUAL)
 @Named("url")
 String provideBarUrl(BarManager bm) { return bm.getUrl(); }
 

will set the default value of @Named("url") Optional<String> to foo's URL, and then override it to bar's URL.

Since:

4.0

Author:

sameb@google.com (Sam Berlin)

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
ProvidesIntoOptional.Type	value Specifies if the binding is for the actual or default value.

Element Detail

value

public abstract ProvidesIntoOptional.Type value

Specifies if the binding is for the actual or default value.