Creating a Generic method to load dataSet in cucumber using Poiji library

Question

I have a class that loaded data from scenario steps my first class is LoadUserStepDfn

public class LoadUserStepDfn extends LoadDataStepDfn<User> {

public LoadUserStepDfn(ReadingUserUsingPoiji readingUserUsingPoiji) {
    super.readingExcelUsingPoiji = readingUserUsingPoiji;
}

@Given("^Data is loaded from \"([^\"]*)\"$")
public void data_is_loaded_from (String filePath) throws Throwable {
    super.data_is_loaded_from(filePath);
}

and it call class named LoadDataStepDfn

public class LoadDataStepDfn<T> {

public List<T> data;

protected ReadingExcelUsingPoiji readingExcelUsingPoiji;

public void data_is_loaded_from (String filePath) throws Throwable {
    data = readingExcelUsingPoiji.TransformExcelToClass(filePath);

}

and here is my class that reads Excel and stores it to java class

public abstract class ReadingExcelUsingPoiji<T> {


    public List<T> TransformExcelToClass(String filePath){
        PoijiOptions options = PoijiOptions.PoijiOptionsBuilder.settings().addListDelimiter(";").build();
        List<T> data = Poiji.fromExcel(new File(filePath), getMyType(), options);
        return data;
    }

    public abstract Class<T> getMyType();

}

the problem that I want to use one class I don't want it to be abstract and use another one which is this class

    public class ReadingUserUsingPoiji extends ReadingExcelUsingPoiji<User> {


    public Class<User> getMyType(){
        return User.class;
    }

Answer 1

I am trying to understand here, so you dont want @override, but rather 1 method that returns you the type of class to transform to??

Why can't it be that simple... You have a method that determines what class you should use to transform to...

I dont understand why you are using generics...your logic doesnt seem to really care for it? Especially if you have 1 ReadingExcelUsingPoiji class..it really shouldnt care.

public class ReadingExcelUsingPoiji<T> {

public List<T> transformExcelToClass(String filePath, Class<T> classToTransformTo) {
    PoijiOptions options = PoijiOptions.PoijiOptionsBuilder.settings().addListDelimiter(";").build();
    List<T> data = Poiji.fromExcel(new File(filePath), classToTransformTo, options);
    return data;
}


public static void main(String [] args) {
    
    ReadingExcelUsingPoiji genericConverter = new ReadingExcelUsingPoiji();
    
    List<User> listOfUsers = genericConverter.transformExcelToClass("yourFilePath", User.class);
    List<Car> listOfCars = genericConverter.transformExcelToClass("yourFilePath", Car.class);
}

}

public class LoadUserStepDfn extends LoadDataStepDfn<User> {

    
    
    @Given("^Data is loaded from \"([^\"]*)\"$")
    public void data_is_loaded_from (String filePath) throws Throwable {
        super.data_is_loaded_from(filePath , User.class);
    }

}




public class LoadDataStepDfn<T> {

    public List<T> data;

    protected ReadingExcelUsingPoiji readingExcelUsingPoiji;

    protected void data_is_loaded_from(String filePath, Class<T> classToTransformTo) throws Throwable {
        data = readingExcelUsingPoiji.transformExcelToClass(filePath, classToTransformTo);

    }

}