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https://issues.apache.org/jira/browse/FLINK-3771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258532#comment-15258532
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ASF GitHub Bot commented on FLINK-3771:
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Github user greghogan commented on the pull request:
https://github.com/apache/flink/pull/1900#issuecomment-214825734
By reuse I was referring to needing `MapVertexValueLongToString` and
`MapEdgeValueLongToString` since the current `Graph` methods operate at the
level of `Vertex` and `Edge`. And then to translate labels you need
`MapVertexLabelLongToString` and `MapEdgeLabelLongToString`. In this PR we
simply have a single `LongToString` which can be used to translate vertex
labels, edge labels, vertex values, and edge values.
I agree that `Translate` methods taking a `Graph` as input would be better
as methods on `Graph`.
And if we don't implement as `MapFunction` then we still need `Translate`
to handle the `TypeInformation`.
> Methods for translating Graphs
> ------------------------------
>
> Key: FLINK-3771
> URL: https://issues.apache.org/jira/browse/FLINK-3771
> Project: Flink
> Issue Type: New Feature
> Components: Gelly
> Affects Versions: 1.1.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Fix For: 1.1.0
>
>
> Provide methods for translation of the type or value of graph labels, vertex
> values, and edge values.
> Sample use cases:
> * shifting graph labels in order to union generated graphs or graphs read
> from multiple sources
> * downsizing labels or values since algorithms prefer to generate wide types
> which may be expensive for further computation
> * changing label type for testing or benchmarking alternative code paths
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