Questions about injection and outjection

[y_zl]

1)When a method in a session bean is invoked, will Seam inject all the variables annotated by @IN or just inject the variables used by the being invoked method?

2)When a Session Bean is injected as a facade, is it possible for the mthod in the session facade bean inject or outject varibales?

3)Could an injected variable such as EntitManager "em" be passed to a POJO method as a parameter?

[norman.richards]

1 - yes
2 - don't understand the question
3 - We've talked about that, but as I recall the problem is that java doesn't store the parameter names (it does, but only as debug information). That means we can't get to the names to do injection in a way that is both simple and consistent with the rest of Seam. Given that you can have an EL method-binding like #{bean.doSomething(em)} now, it's generally not a big issue.

[y_zl]

1) If the answer to question one is Yes, does it mean that it will inject non-relevant variables as well? Does it affect performance ?
2) For question 2, If I have two session beans A and B. B is used as a session facade.

 @Stateless
 @Name("a")
 public Class A ...{
 @In B b;
 public String test1()
 {
 return b.test2("cccc");
 }
 }

 @Stateless
 @Name("b")
 public Class B ...{
 @In String s1;
 @Out String s2;
 public String test2(String s)
 {
 s2=s+"aaaa";
 return s+s1;
 }
 }

is the above codes legal ? Could I get the variable named s2 outjected?

3) For question 3, Could you give a simple example to demo that?

For example

 @Stateless
 @Name("actionA")
 public class ActionA implents ActionAInf {
 @PersistenceContext
 private EntityManager em;

 public String methodA()
 {
 new Bean(em);
 }
 }

How do I use the EL binding in this case?