Examples of javax.enterprise.inject.spi.BeanManager

javax.enterprise.inject.spi.BeanManager
Allows a portable extension to interact directly with the container. Provides operations for obtaining contextual references for beans, along with many other operations of use to portable extensions.

Any bean may obtain an instance of BeanManager by injecting it:
```
 @Inject BeanManager manager; 
```
Java EE components may obtain an instance of BeanManager from {@linkplain javax.naming JNDI} by looking up the name{@code java:comp/BeanManager}.

Any operation of BeanManager may be called at any time during the execution of the application.
@author Gavin King @author Pete Muir @author Clint Popetz @author David Allen

     */
    public static <T> List<T> getContextualReferences(Class<T> type,
                                                      boolean optional,
                                                      boolean includeDefaultScopedBeans)
    {
        BeanManager beanManager = getBeanManager();


        Set<Bean<T>> beans = getBeanDefinitions(type, optional, includeDefaultScopedBeans, beanManager);


        List<T> result = new ArrayList<T>(beans.size());

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        return result;
    }


    public static <T> DependentProvider<T> getDependent(Class<T> type, Annotation... qualifiers)
    {
        BeanManager beanManager = getBeanManager();
        Set<Bean<?>> beans = beanManager.getBeans(type, qualifiers);
        Bean<?> bean = beanManager.resolve(beans);
        return createDependentProvider(beanManager, type, (Bean<T>) bean);
    }

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        return createDependentProvider(beanManager, type, (Bean<T>) bean);
    }


    public static <T> DependentProvider<T> getDependent(String name)
    {
        BeanManager beanManager = getBeanManager();
        Set<Bean<?>> beans = beanManager.getBeans(name);
        Bean<?> bean = beanManager.resolve(beans);
        Class beanClass = bean.getBeanClass();


        return createDependentProvider(beanManager, (Class<T>) beanClass, (Bean<T>) bean);
    }

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     */
    public static <T> Set<Bean<T>> getBeanDefinitions(Class<T> type,
                                                      boolean optional,
                                                      boolean includeDefaultScopedBeans)
    {
        BeanManager beanManager = getBeanManager();
        
        return getBeanDefinitions(type, optional, includeDefaultScopedBeans, beanManager);
    }

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        if (instance == null)
        {
            return null;
        }


        BeanManager beanManager = getBeanManager();


        CreationalContext creationalContext = beanManager.createCreationalContext(null);


        AnnotatedType annotatedType = beanManager.createAnnotatedType(instance.getClass());
        InjectionTarget injectionTarget = beanManager.createInjectionTarget(annotatedType);
        injectionTarget.inject(instance, creationalContext);
        return instance;
    }

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        if (!this.isActivated)
        {
            return;
        }


        BeanManager beanManager = BeanManagerProvider.getInstance().getBeanManager();
        beanManager.fireEvent(e);
    }

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    }


    public static class BeanManagerHelper {
        public Object beanFromClass(final String appName, final String classname) {
            final AppContext appContext = appContext(appName);
            final BeanManager bm = appContext.getBeanManager();
            final Class<?> clazz;
            try {
                clazz = appContext.getClassLoader().loadClass(classname);
            } catch (ClassNotFoundException e) {
                throw new OpenEJBRuntimeException(e);
            }
            final Set<Bean<?>> beans = bm.getBeans(clazz);
            return instance(bm, beans, clazz);
        }

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            final Set<Bean<?>> beans = bm.getBeans(clazz);
            return instance(bm, beans, clazz);
        }


        public Object beanFromName(final String appName, final String name) {
            final BeanManager bm = beanManager(appName);
            final Set<Bean<?>> beans = bm.getBeans(name);
            return instance(bm, beans, Object.class);
        }

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    /**
     * Fires event before bean discovery.
     */
    void fireBeforeBeanDiscoveryEvent()
    {
        BeanManager manager = webBeansContext.getBeanManagerImpl();
        manager.fireEvent(new BeforeBeanDiscoveryImpl(webBeansContext),new Annotation[0]);
    }

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    public void testBeanManagerProvider() throws Exception
    {
        BeanManagerProvider bmp = BeanManagerProvider.getInstance();
        Assert.assertNotNull(bmp);


        BeanManager bm = bmp.getBeanManager();
        Assert.assertNotNull(bm);
    }

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