[BUG][WSDL-SCHEMA] Problem with generating WSDL from OpenApi HashMap definitions

Bug Report Checklist

• 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?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Using openapi-generator with wsdl-schema, generated WSDL doesn't create valid models from OpenApi HashMap defintiions.

Dictionaries, HashMaps and Associative Arrays

openapi-generator version

7.7.0
8.0.0

OpenAPI declaration file content or url

      "Proxy": {
        "required": [
          "attributes",
          "protocol",
          "realmId",
          "tenantId"
        ],
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "format": "uuid"
          },
          "protocol": {
            "$ref": "#/components/schemas/ProtocolType"
          },
          "attributes": {
            "type": "array",
            "items": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            }
          },
          "tenantId": {
            "type": "string",
            "format": "uuid"
          },
          "realmId": {
            "type": "string",
            "format": "uuid"
          }
        }
      }

Proxy is converted into:

<xs:complexType name="Proxy">
  <xs:sequence>
    <xs:element minOccurs="0" name="id" type="xs:string" />
    <xs:element minOccurs="1" name="protocol" type="schemas:ProtocolType" />
    <xs:element minOccurs="1" maxOccurs="unbounded" name="attributes" type="schemas:string" />
    <xs:element minOccurs="1" name="tenantId" type="xs:string" />
    <xs:element minOccurs="1" name="realmId" type="xs:string" />
  </xs:sequence>
</xs:complexType>

attributes is a HashMap and is converted with type="schemas:string", which is wrong and makes wsimport tool to fail.

Generation Details

Swagger converts initial Java class attributes or REST method @RequestBody or @RequestParam into valid OpenApi definitions, but, openapi-generator with wsdl-schema generates those fields as type="schemas:string", which is wrong. schemas:string doesn't exist.

Steps to reproduce

Try to convert OpenApi file with HashMap field definition into WSDL using openapi-generator and wsdl-schema.

Related issues/PRs

Suggest a fix

Handle HashMap field types correctly.

Start with the wsdl-schema generator and reproduce the issue using the provided Proxy schema, focusing on the attributes array with additionalProperties. Compare the generated WSDL with the expected map representation, then run wsimport to confirm the generated schema is valid and no longer references the nonexistent schemas:string type.