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swagger-api / swagger-codegen

swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.
http://swagger.io
Apache License 2.0
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Nullpointer exception in swagger-codegen with java #8348

Open sajhak opened 6 years ago

sajhak commented 6 years ago
Description

When trying to do java codegen with swagger cli, I'm getting a NPE Swagger json is valid one, has validated using swagger UI

Error log

Exception in thread "Thread-1" java.lang.NullPointerException at io.swagger.v3.parser.converter.SwaggerConverter.convert(SwaggerConverter.java:849) at io.swagger.v3.parser.converter.SwaggerConverter.convert(SwaggerConverter.java:827) at io.swagger.v3.parser.converter.SwaggerConverter.lambda$convert$11(SwaggerConverter.java:1049) at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) at io.swagger.v3.parser.converter.SwaggerConverter.convert(SwaggerConverter.java:1048) at io.swagger.v3.parser.converter.SwaggerConverter.convert(SwaggerConverter.java:212) at io.swagger.v3.parser.converter.SwaggerConverter.readLocation(SwaggerConverter.java:90) at io.swagger.parser.OpenAPIParser.readLocation(OpenAPIParser.java:19) at io.swagger.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:433) at io.swagger.codegen.cmd.Generate.run(Generate.java:310) at java.lang.Thread.run(Thread.java:748)

Swagger-codegen version

Tried in both 3.0.0-rc0 and 3.0.0-rc1

Swagger declaration file content or url

Sorry, the swagger cannot be pasted here due to privacy reasons

Command line used for generation

I have downloaded the swagger file as a json into my local filesystem $ java -jar swagger-codegen-cli.jar generate -i swagger.json -l java -o /tmp

Steps to reproduce

Downloaded the 3.0.0-rc0 and 3.0.0-rc1 sources from github, and did a local build in Mac, to get the swagger-codegen-cli binary Then executed following $ java -jar swagger-codegen-cli.jar generate -i swagger.json -l java -o /tmp

Related issues/PRs
Suggest a fix/enhancement
HugoMario commented 5 years ago

hi @sajhak , can you please try with https://github.com/swagger-api/swagger-codegen/releases/tag/v3.0.0 ? and let me know if the issue is till present?