Could lamba statements turn into Tinkerpop ByteCode?

[Yuxing Han]

I am asking this question just for sure. According to my experience, the answer is no.

Take the following gremlin statements for example:

ResultSet results = client.alias("g").submit(g.V().filter(it -> it.get().value("name") == "marko")); 

for (Result result: results) { 

System.out.println(result.getString());

 }

This code example will cause errors like:

...

...

Caused by: 

org.apache.tinkerpop.gremlin.driver.exception.ResponseException: An error occurred during serialization of this request [RequestMessage{, requestId=268d5630-0c4c-4293-bf39-2aea9136f036, op='bytecode', processor='traversal', args={gremlin=[[], [V(), filter(TinkerpopTest$$Lambda$31/1856158867@35a7023b)]], aliases={g=g}}}] - it could not be sent to the server - Reason: org.apache.tinkerpop.gremlin.driver.ser.SerializationException: java.lang.IllegalArgumentException: Class is not registered: TinkerpopTest$$Lambda$31/1856158867

[Stephen Mallette]

You can use lambdas with bytecode assuming the server supports it, however the lambda itself must be submitted as strings:

http://tinkerpop.apache.org/docs/current/reference/#_the_lambda_solution  

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