Package org.omnifaces.cdi.param

Class ParamExtension

java.lang.Object

org.omnifaces.cdi.param.ParamExtension

All Implemented Interfaces:

Extension

public class ParamExtension
extends Object
implements Extension

CDI extension that works around the fact that CDI insists on doing absolutely guaranteed type safe injections. While generally applaudable this unfortunately impedes writing true generic producers that dynamically do conversion based on the target type.

This extension collects the target types of each injection point qualified with the @Param annotation and dynamically registers Beans that effectively represents producers for each type.

Since OmniFaces 3.6, this extension also scans for @Param without @Inject and manually takes care of them while creating the bean.

Since:

2.0

Author:

Arjan Tijms

Constructor Summary

Constructors

Constructor	Description
ParamExtension()

Method Summary

Modifier and Type	Method	Description
<T> void	collectParams(ProcessInjectionTarget<T> event)	Collect fields annotated with Param.
void	processParamsWithInject(AfterBeanDiscovery event)	Process Param fields annotated with Inject.
static <T> void	processParamsWithoutInject(ProcessInjectionTarget<T> event, Set<AnnotatedField<?>> paramsWithoutInject)	/** Process Param fields without Inject annotation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ParamExtension

public ParamExtension()

Method Detail

collectParams

public <T> void collectParams(@Observes
                              ProcessInjectionTarget<T> event)

Collect fields annotated with Param.

Type Parameters:

T - The generic injection target type.

Parameters:

event - The process injection target event.

processParamsWithInject

public void processParamsWithInject(@Observes
                                    AfterBeanDiscovery event)

Process Param fields annotated with Inject.

Parameters:

event - The after bean discovery event.

processParamsWithoutInject

public static <T> void processParamsWithoutInject(ProcessInjectionTarget<T> event,
                                                  Set<AnnotatedField<?>> paramsWithoutInject)

/** Process Param fields without Inject annotation.

Type Parameters:

T - The generic injection target type.

Parameters:

event - The process injection target event.

paramsWithoutInject - The Param fields without Inject annotation.