New step "Neo4j Dimension Graph Lookup/Update"

[zukaitang]

Based on the neo4j-output project, I created a new trans-step named "Dimension Graph Lookup/Update”. Except for the underlying database, this step is similar with the kettle plugin “Dimension Lookup/Update”. Two demo samples under the example directory are created to illustrate the update and lookup functionality respectively.
The different version of a dimension node are connected by a relationship which has a user-defined label name. Different from the original “Dimension Loopup/Update” step, the surrogate keys of a dimension are represented by the dimension node id, which can also be returned with a user-defined name. On the whole, the GUI of this new step is almost the same with the “dimension lookup/update” step.
I hope this work could be merged with the neo4j-output project. Some isssues need future work:

• Currently, the cache function is not supported.
• Currently, the batch operation is also not supported.
• I would develop this step to support the type-3 slowly changing dimensions, which can be well supported in Neo4j.

[mattcasters]

This is pretty cool stuff zukaitang. I'll have a look at this later this week.
I might move the examples to neo4j-examples/kettle-plugin-examples/ if you don't mind.

[zukaitang]

Of course it should be moved to the examples project. :-)