POJO + Converters

Json example

{
  "id": "string",
  "notifications": [
    {
      "content": "string",
      "contentDates": [
        null
      ],
      "id": "string",
      "relatedEntity": {
        "entityId": "string",
        "type": "REMARK"
      },
      "senderId": "string",
      "viewDate": "2019-07-30T09:56:43.552Z",
      "viewed": true
    }
  ],
  "organizations": [
    {
      "code": 0,
      "fullName": "string",
      "id": "string",
      "name": "string",
      "position": "string",
      "projectIds": [
        "string"
      ]
    }
  ],
  "projects": [
    {
      "buildingObjects": [
        {
          "id": "string",
          "name": "string"
        }
      ],
      "id": "string",
      "name": "string",
      "remarks": [
        {
          "authorOrganizationId": "string",
          "authorUserId": "string",
          "contractorOrganizationId": "string",
          "contractorUserId": "string",
          "description": "string",
          "executionDate": "2019-07-30T09:56:43.552Z",
          "executorOrganizationId": "string",
          "executorUserId": "string",
          "id": "string",
          "name": "string",
          "number": "string",
          "priority": "CRITICAL",
          "registrationDate": "2019-07-30T09:56:43.552Z"
        }
      ]
    }
  ],
  "systemTime": 0,
  "user": {
    "deleted": true,
    "email": "string",
    "firstName": "string",
    "id": "string",
    "middleName": "string",
    "permissions": [
      "string"
    ],
    "secondName": "string"
  }
}

PriorityTypeConverter.kt

class PriorityTypeConverter {
    @TypeConverter
    fun fromPriority(status: Priority): String = status.name

    @TypeConverter
    fun toPriority(name: String): Priority = Priority.valueOf(name)
}

Project.kt

@Entity(tableName = "projects")
@TypeConverters(RemarksTypeConverter::class, BuildingObjectsTypeConverter::class)
class Project {
    @PrimaryKey
    @SerializedName("id")
    @ColumnInfo(name = "id")
    var id: String = ""

    @SerializedName("name")
    @ColumnInfo(name = "name")
    var name: String? = "Ants Inc."

    @SerializedName("remarks")
    @ColumnInfo(name = "remarks")
    var remarks: List<Remark>? = listOf()

    @SerializedName("buildingObjects")
    @ColumnInfo(name = "buildingObjects")
    var buildingObjects: List<BuildingObject>? = listOf()
}

Remark.kt

@Entity(tableName = "remarks")
@TypeConverters(PriorityTypeConverter::class, DateFormatConverter::class, RemarkStatusTypeConverter::class, StringListToStringConverter::class)
class Remark {
    @PrimaryKey
    @SerializedName("id")
    @ColumnInfo(name = "id")
    var id: String = ""

    @SerializedName("name")
    @ColumnInfo(name = "name")
    var name: String? = ""

    @SerializedName("number")
    @ColumnInfo(name = "number")
    var number: String? = ""

    @SerializedName("priority")
    @ColumnInfo(name = "priority")
    var priority: Priority? = Priority.CRITICAL

    @SerializedName("registrationDate")
    @ColumnInfo(name = "registrationDate")
    var registrationDate: Date? = Date()

    @SerializedName("executionDate")
    @ColumnInfo(name = "executionDate")
    var executionDate: Date? = Date()

    @SerializedName("description")
    @ColumnInfo(name = "description")
    var description: String? = ""

    @SerializedName("authorOrganizationId")
    @ColumnInfo(name = "authorOrganizationId")
    var authorOrganizationId: String? = ""

    @SerializedName("authorUserId")
    @ColumnInfo(name = "authorUserId")
    var authorUserId: String? = ""

    @SerializedName("contractorOrganizationId")
    @ColumnInfo(name = "contractorOrganizationId")
    var contractorOrganizationId: String? = ""

    @SerializedName("contractorUserId")
    @ColumnInfo(name = "contractorUserId")
    var contractorUserId: String? = ""

    @SerializedName("executorOrganizationId")
    @ColumnInfo(name = "executorOrganizationId")
    var executorOrganizationId: String? = ""

    @SerializedName("executorUserId")
    @ColumnInfo(name = "executorUserId")
    var executorUserId: String? = ""

    @SerializedName("status")
    @ColumnInfo(name = "status")
    var status: RemarkStatus? = RemarkStatus.DRAFT

    @SerializedName("photos")
    @ColumnInfo(name = "photos")
    var photos: List<String>? = listOf()

    @SerializedName("projectId")
    @ColumnInfo(name = "projectId")
    var projectId: String = ""

    @SerializedName("buildingObjectId")
    @ColumnInfo(name = "buildingObjectId")
    var buildingObjectId: String? = ""
}

UpdateResponse.kt

class UpdateResponse {
    @SerializedName("id")
    val id: String? = ""

    @SerializedName("organizations")
    val userOrganizations: List<UserOrganizations>? = listOf()

    @SerializedName("projects")
    val projects: List<Project>? = listOf()

    @SerializedName("user")
    val user: User = User()

}