swagger-api/swagger-codegen

Composed body parameter causes null pointer exception

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#4,798 opened on Feb 14, 2017

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Feature: Composition / InheritanceIssue: BugServer: Javahelp wanted

Description

Description

Defining an api operation with composite parameter causes a ComposedModel to be generated. The swagger-codegen then does not handle that type in class DefaultCodegen function fromParameter. Resulting in a null pointer exception.

Swagger-codegen version

2.2.2-SNAPSHOT

Swagger declaration file content or url

Use Animal object from the swagger spec as body object in the operation.

Command line used for generation

java -jar swagger-codegen/modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate -l jaxrs-cxf - -i api.json

Steps to reproduce
Related issues
Suggest a Fix

Implement composite support for body parameter

Contributor guide

Tech stack
java
Domain
backendapitooling
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Java programmingSwagger/OpenAPI knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
The issue requires implementing support for ComposedModel in the fromParameter method of DefaultCodegen class. The fix should handle composite body parameters correctly to avoid NullPointerException. Suggested approach: check if the parameter's schema is a ComposedModel and handle accordingly. See relevant source files in modules/swagger codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java.