swagger-api/swagger-codegen

[Java] Does not support Map of Map of String or other type

Open

#3,241 opened on Jun 29, 2016

View on GitHub
 (5 comments) (0 reactions) (0 assignees)HTML (12,701 stars) (5,474 forks)batch import
Client: JavaIssue: Bughelp wanted

Description

Description

Currently, Java does not support Map of Map of String or other type

public class MapTest   {
  @SerializedName("map_map_of_string")
  private Map<String, Map<String, String>> mapMapOfString = new HashMap<String, Map<String, String>>();

As shown above, the inner Map is not mapped to HashMap

Swagger-codegen version

Latest master (Jun 28, 2016)

Suggest a Fix

The issue likely has to do with getTypeDeclaration in modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java

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.
1-2 days
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.
clear
Prerequisites
Java genericsCode generation conceptsFamiliarity with AbstractJavaCodegen.java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Start by examining the `getTypeDeclaration` method in `modules/swagger codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaCodegen.java`. The issue indicates that nested Maps are not properly handled. Look at how the codegen currently resolves type declarations for nested generics. Additionally, review recent changes to that file or related tests to ensure the fix aligns with current code structure.