Re: alerts based on annotation sets

[Marin D. <mar...@on...>]

----- Original Message ----- 
From: "Brian Hardy" <bm...@ya...>

>
> Is there a way to know the date associated with when
> an annotation was created for a document?
>

no, but you can add the annotation timestamp as a feature for the annotation 
(and then your application will be able to retrieve it)

if the annotations are created by you (e.g. by a transducer working over a 
set of JAPE rules that you have control over) then you can modify the RHS of 
the Jape rules to also add the timestamp when creating a new annotation

alternatively (and better), you can extend AnntoationSet so that its add() 
methods (several of them) just call the super method and then add a feature 
with the current timestamp to the new annotation

of course you'll have to extend Document as well, so that it works with your 
customised annotation set instead of the default annotation set

if you inspect the code for DatabaseDocumentImpl and 
DatabaseAnnotationSetImpl you'll see something similar. The DB annotation 
sets extends the default sets so that a list of the modifications 
(additions, deletions, updates) that are applied to the annotation set is 
kept, so that the changes can be synchronised with the database later.

In your case the customised annotation set is much simpler but the approach 
is similar

hth,

    Marin

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