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https://issues.apache.org/jira/browse/FLINK-3771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15263758#comment-15263758
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ASF GitHub Bot commented on FLINK-3771:
---------------------------------------
Github user vasia commented on a diff in the pull request:
https://github.com/apache/flink/pull/1900#discussion_r61550681
--- Diff:
flink-libraries/flink-gelly-scala/src/main/scala/org/apache/flink/graph/scala/Graph.scala
---
@@ -407,6 +407,36 @@ TypeInformation : ClassTag](jgraph: jg.Graph[K, VV,
EV]) {
}
/**
+ * Relabels vertices and edges using the given MapFunction.
+ *
+ * @param translator implements conversion from K to NEW
+ * @return relabeled graph
+ */
+ def translateGraphLabels[NEW: TypeInformation : ClassTag](translator:
MapFunction[K, NEW]): Graph[NEW,VV,EV] = {
--- End diff --
In the the Gelly code and docs, we refer to the vertex and edge keys as
"Ids", not labels. I think we should rename the methods and javadocs to be
consistent.
> 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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