You specify that context information is to be injected into a field or a resource method parameter
using the javax.ws.rs.core.Context annotation. Annotating a field or
parameter of one of the context types will instruct the runtime to inject the appropriate context
information into the annotated field or parameter.
Table 7 lists the types of context information that can be injected and the objects that support them.
Table 7. Context types
Context information is available to the following parts of a JAX-RS application:
resource classes
resource methods
entity providers
exception mappers
All context information injected using the @Context annotation is
specific to the current request. This is true in all cases including entity providers and
exception mappers.
The JAX-RS framework allows developers to extend the types of information that can be injected
using the context mechanism. You add custom contexts by implementing a
Context<T> object and registering it with the runtime.
For information on creating custom contexts see Adding custom contexts.
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