Access Component Name

[wrzep]

Hi there,

I'd like to access component name programmatically, in a Java method. Is there a way to do this?

There is a org.jboss.seam.Component class, but I don't know how to get its instance for the current component.

It could be useful for logging :)

Cheers,
-Pawel

[pmuir]

Put a method like

public Component getComponent() {
   return null;
}

and it will magically return the Component for your Seam component.

[wrzep]

Tricky! :)

It works fine, but there is one major drawback. A call to the getComponent() mehtod must be intercepted (by ClientSideInterceptor or JavaBeanInterceptor as it seems from the code).

So, for example, the following code:

log.info("My name is '" + getComponent().getName() + "'");

would fail with NPE, because getComponent() call to myself is not intercepted.

Thoughts that came to my mind:

1. Thing like EJB3 sessionContext.getBusinessObject() for Seam components would solve the problem with interceptors :)

2. How about API to get current component? Like Component.current()?

-Pawel

[pmuir]

Ah, yes.

I guess an API like (2) would be ok - file a JIRA FR.

[coralfe]

Try

Classname whatever = (Classname) Component.getInstance("name");

[durdina]

In seam 2.2.0, there are some undocumented builtin components on method scope (undocumented as well).
org.jboss.seam.this
org.jboss.seam.method
org.jboss.seam.parameters
org.jboss.seam.component

So this prints out component name of current instance:

log.info("My name is #{org.jboss.seam.component.name}");

[markwigmans]

Component.getComponentName(getClass())

works for me