oneOf with discriminator converting to LinkedHashMap in java server

I have used oneOf along with discriminator property in my openapi 3 spec.  I generated the "jaxrs-jersey" server code using codegen tool. 

However when I send sample JSON payload in POST request dataType of the received variable where "oneOf" is used is of type "java.util.LinkedHashMap" , eventhough discriminator property value is provided in POST payload. 

 

attaching sample YAMl file. 

 

 

components:
    schemas:
      Home:
        type: object
        additionalProperties: false
        properties:
          name:
            $ref: '#/components/schemas/Names'
          sofaStyle:
            oneOf:
              - $ref: '#/components/schemas/Sofa1'
              - $ref: '#/components/schemas/Sofa2'
            discriminator:
              propertyName: styleType
        required:
          - name
          - sofaStyle
      Names:
        type: object
        properties:
          name:
            type: string
            enum:
              - "home1"
              - "home2"
        required: 
          - name
      SofaStyleType:
        type: object
        properties:
          styleType:
            type: string
        required: 
          - styleType
        discriminator:
          propertyName: styleType
      Sofa1:
        allOf:
          - $ref: '#/components/schemas/SofaStyleType'
          - type: object 
            properties:
              identifier: 
                type: string
                enum: 
                  - "big"
      Sofa2:
        allOf:
          - $ref: '#/components/schemas/SofaStyleType'
          - type: object 
            properties:
              identifier: 
                type: string
                enum: 
                  - "small"

sample json input 

 

{
  "name" : {
    "name" : "home1"
  },
  "sofaStyle" : {
    "identifier" : "big",
    "styleType" :"Sofa1"
  }
}

I am looking for a way to easily identify and get object of Sofa1 or Sofa2