Interceptor

Type Parameters:

T -

All Superinterfaces:

Bean<T>, BeanAttributes<T>, Contextual<T>
```
public interface Interceptor<T>
extends Bean<T>
```
A Bean for creating and using an interceptor. A CDI interceptor is always a separate dependent instance for each intercepted class. It will get created when the intercepted bean gets created and destroyed when the intercepted bean gets destroyed.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.Set<java.lang.annotation.Annotation>`	`getInterceptorBindings()`	Usually a single Interceptor
`java.lang.Object`	`intercept(InterceptionType type, T instance, javax.interceptor.InvocationContext ctx)`	Perform the interception.
`boolean`	`intercepts(InterceptionType type)`

Methods inherited from interface javax.enterprise.inject.spi.Bean
getBeanClass, getInjectionPoints, isNullable

Methods inherited from interface javax.enterprise.inject.spi.BeanAttributes
getName, getQualifiers, getScope, getStereotypes, getTypes, isAlternative

Methods inherited from interface javax.enterprise.context.spi.Contextual
create, destroy

- Method Detail
  - getInterceptorBindings
```
java.util.Set<java.lang.annotation.Annotation> getInterceptorBindings()
```
    Usually a single Interceptor
    
    Returns:
    
    all InterceptorBindings handled by this interceptor.
  - intercepts
```
boolean intercepts(InterceptionType type)
```
    Parameters:
    
    type - InterceptionType in question
    
    Returns:
    
    true if this interceptor handles the given InterceptionType, false otherwise
  - intercept
```
java.lang.Object intercept(InterceptionType type,
                           T instance,
                           javax.interceptor.InvocationContext ctx)
                    throws java.lang.Exception
```
    Perform the interception. This will e.g. invoke the @AroundInvoke annotated method on the given instance of T.
    
    Parameters:
    
    type - the InterceptionType. This is important if an interceptor has multiple interceptor methods e.g. one @AroundInvoke and one @PostConstruct;
    
    instance - the interceptor instance
    
    ctx - the InvocationContext contains all the interceptor chain state for a single invocation.
    
    Returns:
    
    the object or wrapper type returned by the intercepted instance or the previous interceptor (if this is not the last interceptor in the chain)
    
    Throws:
    
    java.lang.Exception - wrapped from the intercepted instance. See CDI-115