Package javax.annotation
Annotation Interface Resource
The Resource annotation marks a resource that is needed
by the application. This annotation may be applied to an
application component class, or to fields or methods of the
component class. When the annotation is applied to a
field or method, the container will inject an instance
of the requested resource into the application component
when the component is initialized. If the annotation is
applied to the component class, the annotation declares a
resource that the application will look up at runtime.
Even though this annotation is not marked Inherited, deployment tools are required to examine all superclasses of any component class to discover all uses of this annotation in all superclasses. All such annotation instances specify resources that are needed by the application component. Note that this annotation may appear on private fields and methods of superclasses; the container is required to perform injection in these cases as well.
- Since:
- Common Annotations 1.0
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Nested Class Summary
Modifier and TypeClassDescriptionstatic enum
The two possible authentication types for a resource. -
Optional Element Summary
Modifier and TypeOptional ElementDescriptionThe authentication type to use for this resource.Description of this resource.The name of the resource that the reference points to.A product specific name that this resource should be mapped to.The JNDI name of the resource.boolean
Indicates whether this resource can be shared between this component and other components.Class<?>
The Java type of the resource.
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Element Details
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name
String nameThe JNDI name of the resource. For field annotations, the default is the field name. For method annotations, the default is the JavaBeans property name corresponding to the method. For class annotations, there is no default and this must be specified.- Default:
- ""
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lookup
String lookupThe name of the resource that the reference points to. It can link to any compatible resource using the global JNDI names.- Since:
- Common Annotations 1.1
- Default:
- ""
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type
Class<?> typeThe Java type of the resource. For field annotations, the default is the type of the field. For method annotations, the default is the type of the JavaBeans property. For class annotations, there is no default and this must be specified.- Default:
- java.lang.Object.class
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authenticationType
Resource.AuthenticationType authenticationTypeThe authentication type to use for this resource. This may be specified for resources representing a connection factory of any supported type, and must not be specified for resources of other types.- Default:
- CONTAINER
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mappedName
String mappedNameA product specific name that this resource should be mapped to. The name of this resource, as defined by thename
element or defaulted, is a name that is local to the application component using the resource. (It's a name in the JNDIjava:comp/env
namespace.) Many application servers provide a way to map these local names to names of resources known to the application server. This mapped name is often a global JNDI name, but may be a name of any form.Application servers are not required to support any particular form or type of mapped name, nor the ability to use mapped names. The mapped name is product-dependent and often installation-dependent. No use of a mapped name is portable.
- Default:
- ""
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description
String descriptionDescription of this resource. The description is expected to be in the default language of the system on which the application is deployed. The description can be presented to the Deployer to help in choosing the correct resource.- Default:
- ""
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