Avery Ching commented on GIRAPH-29:

I agree that text format graph data is nice.  

We have a helper abstract classes based on TextInputFormat and TextOutputFormat 
to do this:

An example implementation that uses those helper classes is 

Does this satisfy your needs?  Any suggestions for improvement?

> Implement TextVertexInputFormat for text-format graph data
> ----------------------------------------------------------
>                 Key: GIRAPH-29
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-29
>             Project: Giraph
>          Issue Type: New Feature
>          Components: bsp
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>            Priority: Minor
>             Fix For: 0.70.0
> Supporting text-format graph data would be nice. It is helpful for developing 
> graph algorithms and debugging because text-format graph data are 
> human-readable and enable users to easily write sample data sets. 
> Furthermore, text-format data are exchangeable regardless of operating 
> systems or programming languages.
> So, we need a basic InputFormat to help users develop user-defined 
> InputFormat classes to deal text-represented graph data sets.

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