Sort about sortabletableview

[ISchwarz23]

Hi Ruslan,

I would like to start with an explanation about the concept how this library was intended to be used :)

1. the code you have posted is a SortStateViewProvider which is responsible of giving a "image" that shall be shown for a certain SortState in the column header e.g. an arrow up for SortState.SORTED_ASC.
2. The algorithm that is used for sorting the items of the table is fixed and can not be changed. I used the sort algorithm of the java collection which is a stable sort algorithm that guarantees n log n complexity (MergeSort).
3. The Comparator<T> is a simple entity, which defines the sorting order for a certain data type. I think this is exactly what you try to do. As the Comparator interface is part of standard java there is a lot of information and examples available in the web e.g. the Java API Description.

For your concrete example I would go for an Enum representing your (lets call it) State. This State holds the information about the sequence of the defined states (which one comes first, which second, which third).

public enum State {

    NEW(1),
    PENDING(2),
    DONE(3);

    private int sequence;

    Status(int sequence) {
        this.sequence = sequence;
    }

    public int getSequence() {
        return sequence;
    }

}

Now you can create a Comparator which is able to transform the sequence information to the sort information (-1, 0, 1).

public class StateComparator implements Comparator<State> {

    @Override
    public int compare(State firstState, State secondState) {
        return firstState.getSequence() - secondState.getSequence();
    }

}

This Comparator could now be set to a column in you SortableTableView. If you do not manage to transfer this example to your use case I offer to help you with this.

Best regards,
Ingo

[The28AWG]

Its, work! Thanks!