Can anyone explain why event type is an arbitrary string in seam?

I noticed that the event type is just an arbitrary开发者_开发百科 string in seam which will be used in component.xml or annotations. Sometimes it is error-prone if I missspell them, for example "org.jboss.seam.security.notLogedIn", actually it should be "org.jboss.seam.security.notLoggedIn". Is there any alternative way to handle event types?

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Since most of the event keys (types) are declared as public static final (as the one you reference), you can reference them without having troubles of misspelling.

@Observer(Identity.EVENT_NOT_LOGGED_IN)
public void handleNotLoggedIn() {
}

Unfortunately, you cannot use EL in event type declaration in component.xml. I recently tried that.

<event type="#{...}">
    <!-- does not work -->
</event>

There is, IMHO, no other way than copy-and-paste the event keys into the component.xml to prevent misspelling.