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https://issues.apache.org/jira/browse/JCR-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12545015
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Thomas Mueller commented on JCR-1232:
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> public class UUIDNodeId extends UUID implements NodeId { ... }
Cool! (Or just 'NodeId extends UUID', but having a NodeId interface is
probably even better).
+1 for this
> 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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