Hi Steven,
I think that it's a good idea and will try to implement it for RIFE
1.6. I agree that the default lookup approach is better than an
explicit identifier.
Take care,
Geert
On 18 Aug 2006, at 23:59, Steven Grimm wrote:
Just filed this as RIFE-304. It was originally suggested in IRC by
Patrick Lightbody but I think it's a great idea so I figured I'd
write it up.
With the @FlowlinkField and @SubmissionHandler annotations, RIFE is
very close to the "don't repeat yourself" ideal. But there is still
one place where you have to repeat yourself, and where errors can
creep in: templates still need to refer to exit and submission names.
It would be great to have an alternate scheme where you could refer
to exits/submissions by the names of fields in Java classes. For
example:
<a href="${v
EXIT:QUERY:com.foo.elements.AccountHome.EXIT_PAY_BILL/}">...</a>
This has the advantage of allowing IDEs to do refactoring if
classes are renamed, etc. An alternate, less verbose approach would
decouple templates from particular classes:
<a href="${v EXIT:QUERY:EXIT_PAY_BILL/}">...</a>
Then any element implementation that uses the template simply
defines a public static final String field called EXIT_PAY_BILL,
which could point to different places depending on the element in
question. This would be perhaps slightly less amenable to IDE
refactoring, but for class name changes it'd be irrelevant since
there isn't a class name to refactor.
There should probably be some way to mark names to indicate whether
they are raw exit names or field names, but unless that marking is
very terse (say, 1 character) better would be to default to
something like "if there's an exit by this name, use it, otherwise
search for a field" to keep templates as uncluttered as possible.
The same idea can apply to submission handlers. This will be most
useful in conjunction with something like RIFE-303 so there is some
assurance that a submission handler name actually matches the
corresponding submission handler in the element.
<form method="POST" action="${v
SUBMISSION:FORM:SUBMISSION_PAY_BILL/}">
or, fully qualified,
<form method="POST" action="${v
SUBMISSION:FORM:com.foo.elements.BillingHome.SUBMISSION_PAY_BILL/}">
Comments?
-Steve
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Geert Bevin
Uwyn "Use what you need" - http://uwyn.com
RIFE Java application framework - http://rifers.org
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