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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1232) Merge UUID to NodeId
Date Fri, 23 Nov 2007 11:02:43 GMT

    [ https://issues.apache.org/jira/browse/JCR-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12544980
] 

Thomas Mueller commented on JCR-1232:
-------------------------------------

The name 'UUID' is currently used by some central components (for example persistence managers).
To simplify migration, what about:

- Create a interface UUID a interface
- Let NodeId implement UUID (the interface)
- Merge NodeId and UUID (the class) like you did 
- UUID NodeId.getUUID() { return this; }

What do you think?
Thomas

> Merge UUID to NodeId
> --------------------
>
>                 Key: JCR-1232
>                 URL: https://issues.apache.org/jira/browse/JCR-1232
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Jukka Zitting
>            Priority: Minor
>         Attachments: nodeid.patch
>
>
> The current NodeId class is mostly just a wrapper around UUID, which causes two objects
to be instantiated for each node identifier that the system uses. The memory and processing
overhead is quite small, but given that there are tons of NodeId instances it would be good
to eliminate that overhead.
> There is also lots of code that just converts UUIDs to NodeIds and vice versa. We could
simplify such code if we just used NodeId everywhere.
> Also, we might want to open up the possibility of using non-UUID node identifiers at
some point in future, so it would make a lot of sense to remove the NodeId.getUUID method
and rely directly on NodeId and it's equals(), hashCode(), and toString() methods in many
places where we currently use UUIDs.

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