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https://issues.apache.org/jira/browse/TINKERPOP-844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15527071#comment-15527071
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Marko A. Rodriguez commented on TINKERPOP-844:
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Please see {{PropertyMapStep}}. In master/ (3.2.3-SNAPSHOT) a
{{PropertyMapStep}} can now take a child traversal that gets desired
properties. The old model of simply using {{vertex.properties(propertyKeys)}}
still exists. However, as a provider, you can {{setPropertyTraversal()}} to
{{__.properties(propertyKeys)}} to get the desired effect.
https://github.com/apache/tinkerpop/blob/master/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/PropertyMapStep.java
If this is sufficient, please close this ticket, else provide feedback.
> PropertyMapStep should reuse PropertiesStep
> -------------------------------------------
>
> Key: TINKERPOP-844
> URL: https://issues.apache.org/jira/browse/TINKERPOP-844
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.0.2-incubating
> Reporter: Matthias Broecheler
> Assignee: Marko A. Rodriguez
> Fix For: 3.2.3
>
>
> Currently, there are two steps which retrieve properties: PropertiesStep and
> PropertyMapStep. For any vendor implementation wishing to optimize property
> retrieval this means twice the (redundant) work because each of the steps
> needs to be extended individually.
> However, the functionality is very similar. PropertyMapStep should be
> replaced by two steps: PropertiesStep which returns an iterator over
> properties and a MapAggregatorStep (not tied to the name) which consumes
> properties from the previous step and builds the map (either with property or
> values as the the map value) until the element of a property differs.
> This reuse of PropertiesStep would have increase code reuse inside TinkerPop
> and should not have a significant performance impact. Most importantly, it
> makes life a lot easier for implementors.
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