I'm trying to inject a ManagedBean in my FacesConverted the following way:
@ManagedBean
@RequestScoped
@FacesConverter(forClass = Group.class)
public class GroupConverter implements Converter { @ManagedProperty("#{groupService}")
private GroupService groupService; @Override
public Group getAsObject(FacesContext context, UIComponent arg1,
String groupName) {
return groupService.findGroupByName(groupName);
} @Override
public String getAsString(FacesContext arg0, UIComponent arg1, Object group) {
return ((Group) group).getName();
} public GroupService getGroupService() {
return groupService;
} public void setGroupService(GroupService groupService) {
this.groupService = groupService;
} }
The problem is that groupService isn't being injected and I get a NullPointerEx. Shouldn't it be autowired automatically since it's also a ManagedBean? It all works when I change "getAsObject" to "return new Group();" obviously.
Any ideas?
The solution:
It is likely that you are not resolving the managed bean name.
@ManagedBean(name = "myConverter")
@RequestScoped
@FacesConverter(value = "myConverter")
public class MyConverter implements Converter {
For example, consider these two components:
<h:inputText converter="myConverter" value="#{foo.prop}" />
<h:inputText converter="#{myConverter}" value="#{bar.prop}" />
When the converter is set on the first component, it will be created by Application.createConverter. A converter is not a managed bean. The same rules apply if you match a converter by type.
In the second component, a value expression is used to return a class that implements Converter. This uses the usual managed bean mechanisms. In this case, the @FacesConverter annotation is irrelevant.