org.apache.felix.ipojo.annotations

Annotation Type Provides

@Target(value={TYPE,ANNOTATION_TYPE})
public @interface Provides

This annotation declares that the component instances will provide a service.

     @Component
      @Provides
     public class MyComponent implements Service {
         // ...
     }
 

Author:

Felix Project Team

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
StaticServiceProperty[]	properties Allows adding static properties to the service.
Class[]	specifications Set the provided specifications.
String	strategy Set the service object creation strategy.

Element Detail

specifications

public abstract Class[] specifications

Set the provided specifications. It can be used to force the exposed service to use an implementation class (not an interface) as specification. Default : all implemented interfaces

     @Component
      @Provides(specifications = AbsComponent.class)
     public class MyComponent extends AbsComponent {
         // ...
     }
 

Default:

{}

strategy

public abstract String strategy

Set the service object creation strategy. Multiple values are possible: SINGLETON, SERVICE, METHOD, INSTANCE or the strategy fully qualified class name:

• SINGLETON: Default strategy
• SERVICE: OSGi Service Factory style, 1 POJO instance per consumer bundle
• METHOD: Delegates the creation to the factory-method of the component, method will be called every time the service reference is get.
• INSTANCE: Creates one service object per requiring instance
• Any other value is interpreted as the qualified name of a CreationStrategy implementation

Default:

"SINGLETON"

properties

public abstract StaticServiceProperty[] properties

Allows adding static properties to the service. Nested properties are static service properties, so must contain the name, value and type as they are not attached to a field (cannot discover type through introspection). The array contains StaticServiceProperty elements. Default : No service properties

     @Component
      @Provides(
         properties = {
              @StaticServiceProperty(name = "size", type = "int", value = "5"),
              @StaticServiceProperty(name = "name", type = "java.lang.String", value = "OSGi")
         }
     )
     public class MyComponent implements Service {
         // ...
     }
 

Default:

{}