PsiReference Follow

Hi,

try to develop a code completion plug-in for a xml-configuration for a
Bean-Mapper (Dozer):



Code completion for Tag class-a and class-b is ok.
Now I try to manage the completion for the methods of the java-beans (f.e?

In my ProjectComponent-Implementation i register XmlTag.class wiht my
PsiReferenceProvicer:

• DozerProjectComponent*******

I am not shure: How can I register only the Tags and to the
ReferenceProvider?

public void initComponent() {
         DozerPsiReferenceProvider dozerPsiReferenceProvider = new
DozerPsiReferenceProvider();

ReferenceProvidersRegistry.getInstance(project).registerReferenceProvider(XmlTag.class,
dozerPsiReferenceProvider);
     }

• DozerPsiReferenceProvider*****

Ok?
public PsiReference[] getReferencesByElement(@NotNull PsiElement
element, @NotNull ProcessingContext context) {
         return new DozerPsiReference[0];
     }

• DozerPsiReference

How can I obtain all methods of the Java-Beans in my Project?
  @NotNull
     public Object[] getVariants() {
         LookupValueFactory.? (?????)
         return psiClass.getMethods();
     }

Thanks in advance for your help!
BTW: Is there any short how-to / tutorial / sample available?

best regards,
Matthias