garden-coding-assignment/src/MenuActionAddRow.java

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class MenuActionAddRow implements ActionListener {
    private DataTableModel tableModel;
    private boolean askForPosition;

    public MenuActionAddRow(DataTableModel tableModel, boolean askForPosition) {
        this.tableModel = tableModel;
        // If set to true user will be prompted to input row name
        this.askForPosition = askForPosition;
    }

    public void actionPerformed(ActionEvent e) {
        System.out.println("Create Row");

        // Default parameters
        // Direction: If true - append north, else append south
        boolean direction = false;
        int row = -1;

        if (askForPosition) {
            Object[] options = {"Добавить на север", "Добавить на юг", "Отмена"};

            JPanel panel = new JPanel();
            panel.add(new JLabel("Введите номер строки который должен быть добавлен"));

            JTextField textField = new JTextField(10);
            panel.add(textField);

            // Keep asking for number until valid response is received
            while (row == -1) {
                int result = JOptionPane.showOptionDialog(
                        null,
                        panel,
                        "Введите номер строки",
                        JOptionPane.YES_NO_CANCEL_OPTION,
                        JOptionPane.PLAIN_MESSAGE,
                        null,
                        options,
                        null
                );

                // Canceled by user
                if (result == JOptionPane.CLOSED_OPTION || result == 2) {
                    return;
                }

                // Process user response
                boolean inputDirection = result == 0;

                IndexValidator indexValidator = new IndexValidator(tableModel);
                int inputRow = indexValidator.validateRowIndex(textField.getText());

                // If an error was encountered
                if (inputRow == -1) {
                    continue;
                }

                // This point is reached only upon receival of valid number
                direction = inputDirection;
                row = inputRow;
            }
        } else {
            // If askForPosition is false, then append row to the end
            row = tableModel.getRowCount();
        }

        // If direction is north, the actual index is the preceeding one
        if (direction) {
            row--;
        }

        tableModel.addRow(row);
    }
}