Injecting context variable to child component

[wuguangyi]

I am a new Seam user and is struggling with this simple question. Please bear with me. What is the best approach for a parent component to invoke child component with different context variable injected? The test code is posted blow to illustrate:

@Name("parent")
@Scope(ScopeType.SESSION)
public class ParentAction {

    @In private ChildAction child;

    @In private List<Booking> bookingList;

    public void confirm() {
        for (Booking booking : bookingList) {
            ScopeType.EVENT.getContext().set("booking", booking);
            child.confirm();
        }
    }
}

To make it work, I set the context directly through ScopeType.EVENT.getContext().set("booking", booking) but I don't feel comfortable with this approach. Another approach I can think of is to define child.confirm(booking), but I have to make injection of booking not required.

Here are the other classes for run a test:

@Name("child")
@Scope(ScopeType.SESSION)
public class ChildAction {

    @Logger private transient Log log;

    @In private Booking booking;

    public void confirm() {
        log.info("confirm booking #0", booking.id);
    }
}

@Name("booking")
public class Booking implements Serializable {

    public int id;

    public Booking(final int id) {
        this.id = id;
    }

    @Override
    public String toString() {
        return "Booking(" + id + ")";
    }
}

    @Test
    public void testInvokeChild() throws Exception {
        new ComponentTest() {

            @Override
            protected void testComponents() throws Exception {
                Component.getInstance(ChildAction.class);
                ParentAction parent = 
                    (ParentAction) Component.getInstance(ParentAction.class);

                ScopeType.EVENT.getContext().set("bookingList",
                        Arrays.asList(new Booking[] {
                                new Booking(0),
                                new Booking(1),
                                new Booking(2),
                        }));
                parent.confirm();
            }

        }.run();
    }

Thanks in advance!
George

[gonorrhea]

try this:

@Name("parent")
@Scope(ScopeType.SESSION)
public class ParentAction {

    @In private ChildAction child;

    @In private List<Booking> bookingList;
    
    @In(required=false, scope=ScopeType.EVENT)
    @Out(required=false, scope=ScopeType.EVENT)
    private Booking injectedBooking;

    public void confirm() {
        for (Booking booking : bookingList) {
            injectedBooking = booking;
            child.confirm();
        }
    }
}

In this example, injectedBooking is bijected (injected, outjected, disinjected).

[wuguangyi]

Thanks for your reply! But, it does not work. I got the following exception:

org.jboss.seam.RequiredException: @In attribute requires non-null value: child.booking

I can see 2 issues: 1. the field should be booking rather than injectedBooking to be used in ChildAction; and, 2. the outjection and disjection of injectedBooking happen at the end of parent.confirm() rather than before every invocation of child.confirm(), and hence does not affect injection for child.confirm().