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ManagedProperty not injected in @FacesConver

系統(tǒng) 1907 0

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.

ManagedProperty not injected in @FacesConverter


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