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From Jörn Kottmann (JIRA) <uima-...@incubator.apache.org>
Subject [jira] Commented: (UIMA-360) Add CAS change notifications
Date Thu, 14 Jun 2007 20:44:27 GMT

    [ https://issues.apache.org/jira/browse/UIMA-360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12504907
] 

Jörn Kottmann commented on UIMA-360:
------------------------------------

Sure, currently the Cas Editor has very simple cas change notidication, for added, removed
and changed annotations. This works
fine if the user is manually modiyfing the cas. If I start an automatic tagger it fails (cause
the uima code does not calls my methods to notifiy about a change). 

I think change notifications should belong to the core and not in an ui layer.
There are options to make it fast enough that it does not slows the current code.
We can check a variable which contains a set of listeners against null. 
An other option is to decorate the cas on creation with a change notifcation layer.

> Add CAS change notifications
> ----------------------------
>
>                 Key: UIMA-360
>                 URL: https://issues.apache.org/jira/browse/UIMA-360
>             Project: UIMA
>          Issue Type: New Feature
>          Components: Core Java Framework
>            Reporter: Jörn Kottmann
>         Attachments: cas editor doc.txt, images.zip
>
>
> Add a facility to listen to changes which are made to the CAS.

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