"Cannot construct instance of <struct>" in callbacks

[rix0rrr]

🐛 Bug Report

Affected Languages

• TypeScript or Javascript
• Python
• Java
• .NET (C#, F#, ...)
• Go

General Information

• JSII Version: whatever CDK 1.118.0 gets built with 😅
• Platform: Any, tried on Mac

What is the problem?

(Originally reported as aws/aws-cdk#15791)

CDK Pipelines allows users to write their own classes, implementing an interface, that slot into the CDK Pipelines framework. The slightly odd thing is that it requires them to extend one class and implement an unrelated interface:

public class LambdaStep extends Step implements ICodePipelineActionFactory {

When the step.produceAction method finally gets invoked, the Java Runtime doesn't know how to deserialize the ProduceActionOptions struct:

Error: Cannot construct instance of `software.amazon.awscdk.pipelines.ProduceActionOptions` (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information

Upon object creation, it seems the runtime is not aware of the interface:

{
  "fqn": "@aws-cdk/pipelines.Step",
  "args": [
    "MyStep"
  ],
  "overrides": [
    {
      "method": "produceAction",
      "cookie": "public software.amazon.awscdk.pipelines.CodePipelineActionFactoryResult com.myorg.LambdaStep.produceAction(software.amazon.awscdk.services.codepipeline.IStage,software.amazon.awscdk.pipelines.ProduceActionOptions)"
    }
  ],
  "interfaces": [],   // <--------- VRONK!
  "api": "create"
}

Repro: https://github.com/rix0rrr/jsii-repro

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