[BUG][JAVA][jaxrs-spec] Path Parameter is in Class "Path" Annotation --> Response is 404

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• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

Generated Class has a Path Parameter in Class @Path("/profile/{userId}"). REST-Call Response is 404.

openapi-generator version

6.0.1

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  version: 1.0.0
  title: Test Resource
  description: Diese TEST API
servers:
  - url: /
paths:
  /profile/{userId}/email:
    get:
      operationId: getEmail
      tags:
        - Email
      parameters:
        - name: userId
          in: path
          description: The userId.
          required: true
          schema:
            type: string
      responses:
        200:
          description: The Email
          content:
            text/plain:
              schema:
                type: string
  /profile/{userId}/mobilenr:
    get:
      operationId: getMobileNr
      tags:
        - MobileNr
      parameters:
        - name: userId
          in: path
          description: The userId.
          required: true
          schema:
            type: string
      responses:
        200:
          description: The MobileNr
          content:
            text/plain:
              schema:
                type: string
  /profile/{userId}/username:
    get:
      operationId: getUsername
      tags:
        - Username
      parameters:
        - name: userId
          in: path
          description: The userId.
          required: true
          schema:
            type: string
      responses:
        200:
          description: The Username
          content:
            text/plain:
              schema:
                type: string

Generation Details

Java

Steps to reproduce

Example
Generate Class with

test/{pathParameter}/foo
test/{pathParameter}/bar

Related issues/PRs

Suggest a fix

Here are the CodeLines from Class AbstractJavaJAXRSServerCodegen. The Common Path is on the class Annotation.

private static String getCommonPath(String path1, String path2) {
    final String[] parts1 = StringUtils.split(path1, "/");
    final String[] parts2 = StringUtils.split(path2, "/");
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < Math.min(parts1.length, parts2.length); i++) {
        if (!parts1[i].equals(parts2[i])) {
            break;
        }
        builder.append("/").append(parts1[i]);
    }
    return builder.toString();
}

Start with AbstractJavaJAXRSServerCodegen and its getCommonPath method, then generate the Java JAX-RS server from the provided OpenAPI declaration. Inspect how the shared @Path("/profile/{userId}") class annotation combines with the generated operation paths. Done means the generated endpoints containing the path parameter resolve successfully instead of returning 404.