Severin Stampler created TINKERPOP-1791:
-------------------------------------------
Summary: 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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