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Yang Xia closed TINKERPOP-819. ------------------------------ Resolution: Won't Do Closing given [discussion|https://lists.apache.org/thread/om2m0phg25s83529p9w0gldmcxz7578h] - it can be reopened if there is expectation that there will be active work on this item. > Mapping Cardinality Interface > ----------------------------- > > Key: TINKERPOP-819 > URL: https://issues.apache.org/jira/browse/TINKERPOP-819 > Project: TinkerPop > Issue Type: Improvement > Components: process > Affects Versions: 3.0.2-incubating > Reporter: Marko A. Rodriguez > Priority: Minor > Labels: breaking > > I think it would be handy (for some {{sack()}} work I'm doing on > merging/splitting sacks), but also in general as I've wanted this before > (can't remember why). I think we should add the following interfaces. > {code} > ManyToOneMapping (e.g. reducing barriers) > OneToManyMapping (e.g. flatmap) > OneToOneMapping (e.g. map, sideeffects) > OneToOneOrNoneMapping (e.g. filter) > {code} > We can just rely on {{instanceof FlatMapStep}} or {{instanceof MapStep}} as > there are steps that are "map steps" but don't extend {{MapStep}}, but > instead {{AbstractStep}}. Either we make it so that all steps MUST extend > from {{FlatMapStep}}, {{MapStep}}, etc. or we can add the above interfaces. -- This message was sent by Atlassian Jira (v8.20.10#820010)