@ApplicationScoped public class ConverterManager extends Object
The @FacesConverter is by default not eligible for dependency injection by @Inject nor @EJB.
There is a workaround
for EJB, but this is nasty and doesn't work out for CDI. Another way
would be to make it a JSF or CDI managed bean, however this doesn't register the converter instance into the JSF application context,
and hence you won't be able to make use of Application.createConverter(String) on it. Further it also breaks
the power of forClass attribute, i.e. you can't register a JSF converter for a specific type anymore and
you'd need to explicitly declare it everytime.
Initially, this should be solved in JSF 2.2 which comes with new support for dependency injection in among others all
javax.faces.*.*Factory, NavigationHandler, ResourceHandler,
ActionListener, PhaseListener and SystemEventListener instances.
The Converter and Validator were initially also among them, but they broke a TCK test and were at the
last moment removed from dependency injection support.
The support is expected to come back in JSF 2.3, but we just can't wait any longer.
MyFaces CODI has support for it,
but it requires an additional @Advanced annotation.
OmniFaces solves this by implicitly making all FacesConverter instances eligible for dependency injection
without any further modification.
The ConverterManager provides access to all FacesConverter annotated Converter instances
which are made eligible for CDI.
In Java EE 7's CDI 1.1, when having a CDI 1.1 compatible beans.xml, by default only classes with an
explicit CDI managed bean scope annotation will be registered for dependency injection support. In order to cover
FacesConverter annotated classes as well, you need to explicitly set bean-discovery-mode="all"
attribute in beans.xml. This was not necessary in Mojarra versions older than 2.2.9 due to an
oversight. If you want to keep the default of
bean-discovery-mode="annotated", then you need to add Dependent annotation to the converter class.
In case you have a FacesConverter annotated class extending another FacesConverter annotated class
which in turn extends a standard converter, then you may with bean-discovery-mode="all" face an
AmbiguousResolutionException. This can be solved by placing Specializes annotation on the subclass.
By default, CDI only instantiates beans via the default constructor. In case a converter for a class is created,
and the returned converter does not have a default constructor, or has a single argument constructor that takes a
Class instance, then this converter will not be made eligible for CDI. This change was added
in OmniFaces 2.6 as per issue 25.
OmniFaces 3.0 continued to work fine with regard to managed converters which are initially developed for JSF 2.2.
However, JSF 2.3 introduced two new features for converters: parameterized converters and managed converters.
When the converter is parameterized as in implements Converter<T>, then you need to use
at least OmniFaces 3.1 wherein the incompatibility was fixed. When the converter is managed with the new JSF 2.3
managed=true attribute set on the FacesConverter annotation, then the converter won't be
managed by OmniFaces and will continue to work fine for JSF. But the <o:converter> tag won't be able to
set attributes on it.
OmniApplication,
OmniApplicationFactory| Constructor and Description |
|---|
ConverterManager() |
| Modifier and Type | Method and Description |
|---|---|
Converter |
createConverter(Application application,
Class<?> converterForClass)
Returns the converter instance associated with the given converter for-class,
or
null if there is none. |
Converter |
createConverter(Application application,
String converterId)
Returns the converter instance associated with the given converter ID,
or
null if there is none. |
public Converter createConverter(Application application, String converterId)
null if there is none.application - The involved JSF application.converterId - The converter ID of the desired converter instance.null if there is none.public Converter createConverter(Application application, Class<?> converterForClass)
null if there is none.application - The involved JSF application.converterForClass - The converter for-class of the desired converter instance.null if there is none.Copyright © 2012–2020 OmniFaces. All rights reserved.