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https://issues.apache.org/jira/browse/TINKERPOP-1791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16219605#comment-16219605
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ASF GitHub Bot commented on TINKERPOP-1791:
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Github user dkuppitz commented on the issue:
https://github.com/apache/tinkerpop/pull/736
VOTE: +1
> GremlinDsl custom step with generic end type produces invalid code in __.java
> -----------------------------------------------------------------------------
>
> Key: TINKERPOP-1791
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1791
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.2.5
> Reporter: Severin Stampler
>
> I'm trying the create a custom step to perform a full-text search in an
> external index and return the matching vertices or edges, like this:
> {code:java}
> @GremlinDsl(traversalSource =
> "com.saillabs.mediaminer.mmgraphdsl.MMGraphTraversalSourceDsl")
> public interface MMGraphTraversalDsl<S, E> extends GraphTraversal.Admin<S, E>
> {
> public default GraphTraversal<S, E> search(String field, String query) {
> //TODO:
> // Find vertex ids matching the search query in external index
>
> Set<String> vids = new HashSet<>();
> // for now add some hardcoded vertex ids
> vids.add("vertex1");
> vids.add("vertex2");
>
> return hasId(P.within(vids));
> }
>
> }
> {code}
> The code seems correct in my point of view, but the generated code in the
> __.java is not compilable. It produces this error:
> {noformat}
> [ERROR]
> /C:/svn/start/mm/mmserver/server/mvn/mmgraphdsl/target/generated-sources/annotations/com/saillabs/mediaminer/mmgraphdsl/__.java:[41,41]
> cannot find symbol
> [ERROR] symbol: class E
> [ERROR] location: class com.saillabs.mediaminer.mmgraphdsl.__
> {noformat}
> The generated code is this:
> {code:java}
> public static <S> MMGraphTraversal<S, E> search(String field, String query) {
> return __.<S>start().search(field,query);
> }
> {code}
> I think the correct generated code should look like this:
> {code:java}
> public static <S> MMGraphTraversal<S, S> search(String field, String query) {
> return __.<S>start().search(field,query);
> }
> {code}
> I think it's a bug in the GremlinDsl code generator, however, I may be wrong.
> Any help is appreciated.
> Thanks, br
> Severin
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