javax.enterprise.inject

Interface Instance<T>

All Superinterfaces:

java.lang.Iterable<T>, Provider<T>

All Known Implementing Classes:

InstanceImpl

public interface Instance<T>
extends Provider<T>, java.lang.Iterable<T>

Factory to create instances of a bean.

Example: injecting and using Instance

 package example;

 import javax.enterprise.inject.*;
 import javax.servlet.*;

 public class MyServlet extends GenericServlet {
  @Obtains  @Instance<MyBean> _beanFactory;

  public void service(ServletRequest req, ServletResponse res)
  {
    MyBean bean = _beanFactory.get();
  }
 }
 

See Also:

javax.event.Event

Method Summary

Modifier and Type	Method and Description
boolean	isAmbiguous() Test if there are multiple beans that match the instance.
boolean	isUnsatisfied() Test if there are any beans that match the instance.
Instance<T>	select(java.lang.annotation.Annotation... qualifiers) Restricts the instance given a set of qualifiers
<U extends T> Instance<U>	select(java.lang.Class<U> subtype, java.lang.annotation.Annotation... qualifiers) Restricts the instance to a subtype and bindings.
<U extends T> Instance<U>	select(TypeLiteral<U> subtype, java.lang.annotation.Annotation... qualifiers) Restricts the instance to a subtype and bindings.

Methods inherited from interface javax.inject.Provider

get

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Detail

select

Instance<T> select(java.lang.annotation.Annotation... qualifiers)

Restricts the instance given a set of qualifiers

select

<U extends T> Instance<U> select(java.lang.Class<U> subtype,
                                 java.lang.annotation.Annotation... qualifiers)

Restricts the instance to a subtype and bindings.

select

<U extends T> Instance<U> select(TypeLiteral<U> subtype,
                                 java.lang.annotation.Annotation... qualifiers)

Restricts the instance to a subtype and bindings.

isUnsatisfied

boolean isUnsatisfied()

Test if there are any beans that match the instance.

isAmbiguous

boolean isAmbiguous()

Test if there are multiple beans that match the instance.