javax.enterprise.inject.spi

Interface Interceptor<T>

Type Parameters:

T - the interceptor bean class

All Superinterfaces:

Bean<T>, BeanAttributes<T>, Contextual<T>

public interface Interceptor<T>
extends Bean<T>

Represents an enabled interceptor.

Since CDI 2.0, an implementation of this interface may implement Prioritized in order to enable the interceptor with given priority value for entire application.

Author:

Gavin King, Pete Muir, David Allen

Method Summary

Modifier and Type	Method and Description
Set<Annotation>	getInterceptorBindings() Obtains the interceptor bindings of the interceptor.
Object	intercept(InterceptionType type, T instance, InvocationContext ctx) Invokes the specified kind of lifecycle callback or method invocation interception upon the given interceptor instance.
boolean	intercepts(InterceptionType type) Determines if the interceptor intercepts the specified kind of lifecycle callback or method invocation.

Methods inherited from interface javax.enterprise.inject.spi.Bean

getBeanClass, getInjectionPoints, isNullable

Methods inherited from interface javax.enterprise.context.spi.Contextual

create, destroy

Methods inherited from interface javax.enterprise.inject.spi.BeanAttributes

getName, getQualifiers, getScope, getStereotypes, getTypes, isAlternative

Method Detail

getInterceptorBindings

Set<Annotation> getInterceptorBindings()

Obtains the interceptor bindings of the interceptor.

Returns:

the set of interceptor bindings

intercepts

boolean intercepts(InterceptionType type)

Determines if the interceptor intercepts the specified kind of lifecycle callback or method invocation.

Parameters:

type - the kind of interception

Returns:

returns true if the interceptor intercepts callbacks or business methods of the given type, and false otherwise.

intercept

Object intercept(InterceptionType type,
                 T instance,
                 InvocationContext ctx)
          throws Exception

Invokes the specified kind of lifecycle callback or method invocation interception upon the given interceptor instance.

Parameters:

type - the kind of interception

instance - the interceptor instance to invoke

ctx - the context for the invocation

Returns:

the invocation return value

Throws:

Exception - thrown by the target method and/or the following interceptors in the chain