使用泛型类型设计类和接口

我有以下接口,映射并接受为参数a InsectTypesEntity 并返回 InsectDataModel 以及另一个返回 List<InsectDataModel>

我试着用泛型做这个,因为我想练习这个。

interface InsectInteractorMapper<T> {
    fun map(insectTypesEntity: T): T
    fun map(cursor: Cursor): List<T>
}

如果没有泛型的话,可能是这样的:

interface InsectInteractorMapper<InsectTypesEntity> {
    fun map(insectTypesEntity: InsectTypesEntity): InsectDataModel
    fun map(cursor: Cursor): List<InsectDataModel>
}

我正在尝试使用接口的泛型版本获取实现此功能的类,但是,我收到许多与此相关的错误:

1) Return type is 'insectDataModel' which is not a subtype of overridden
public abstract fun map(insectTypesEntity: InsectTypesEntity): InsectTypeEntity defined in InsectInteractorMapper

2) Return type is 'List<InsectDataModel>' which is not a subtype of overridden
public abstract fun map(cursor: Cursor): List<InsectTypesEntity> defined in InsectInteractorMapper

实现接口的类

class InsectInteractorMapperImp: InsectInteractorMapper<InsectTypesEntity> {
    override fun map(insectTypesEntity: InsectTypesEntity): InsectDataModel {

        return InsectDataModel(
                insectTypesEntity.friendlyName,
                insectTypesEntity.scientificName,
                insectTypesEntity.classification,
                insectTypesEntity.imageAsset,
                insectTypesEntity.dangerLevel)
    }

    override fun map(cursor: Cursor): List<InsectDataModel> {
        val insectDataModelList: MutableList<InsectDataModel> = mutableListOf()

        cursor.moveToFirst()
        while(cursor.moveToNext()) {
            InsectDataModel().let {
                it.friendlyName = cursor.getString(cursor.getColumnIndexOrThrow(InsectContract.COLUMN_FRIENDLY_NAME))
                it.scientificName = cursor.getString(cursor.getColumnIndexOrThrow(InsectContract.COLUMN_SCIENTIFIC_NAME))
                it.dangerLevel = cursor.getInt(cursor.getColumnIndexOrThrow(InsectContract.COLUMN_DANGER_LEVEL))

                insectDataModelList.add(it)
            }
        }

        cursor.close()
        return insectDataModelList.toList()
    }
}

用泛型来正确处理这个问题的最佳方法是什么?

非常感谢你的建议,

===更新 输入/输出差异修改界面:

interface InsectInteractorMapper<in E, out M> {
    fun map(insectTypesEntity: E): M
    fun map(cursor: Cursor): List<M>
}

但是,当我尝试使用界面时,会收到一个警告:

unchecked assignment java.util.List to java.util.List<InsectDataModel> Reason insectDataModelMapper has raw type so result of map will be erased 

当我这样使用它时:

insectInteractorMapper = new InsectInteractorMapperImp();
insectDataModelList = insectInteractorMapper.map(cursor);