projjpn/projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Games.java

package de.hs_fulda.ciip.projjpn;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Games {
	private String databaseURL = "jdbc:ucanaccess://GamesDB.accdb";
	
	public boolean checkConnection() {
		try {
			Connection connection = DriverManager.getConnection(databaseURL);

			connection.close();
			return true;

		} catch (SQLException e) {
			return false;
		}
	}
	
	public String checkConsoles() {
		String result = "";
		String query = "SELECT Game_Console FROM Games";
		boolean ninSwitch = false;
		boolean xbox = false;
		boolean multiplat = false;

		try {
			Connection connection = DriverManager.getConnection(databaseURL);

			Statement statement = connection.createStatement();
			ResultSet resultSet = statement.executeQuery(query);

			while (resultSet.next()) {
					String gameConsole = resultSet.getString("Game_Console");
					
					if (ninSwitch && gameConsole.equals("Nintendo Switch")) {
						continue;
					} else if (xbox && gameConsole.equals("Xbox")) {
						continue;
					} else if (multiplat && gameConsole.equals("Multiplatform")) {
						continue;
					}
					
					switch (gameConsole) {
					case "Nintendo Switch":
						ninSwitch = true;
						break;
					case "Xbox":
						xbox = true;
						break;
					case "Multiplatform":
						multiplat = true;
						break;
					}
					
					
					
					result += gameConsole + ", ";
			
			}
			statement.close();
			connection.close();

		} catch (SQLException e) {
			e.printStackTrace();
		}
		// The substring removes the last New line in the String.
		return result.substring(0, result.length() - 2);
	}
	
	public String checkAllSamePublishers() {
		String result = "";
		String query = "SELECT Game_Name, Game_Publisher_EU, Game_Publisher_JP, Game_Publisher_NA FROM Games";

		try {
			Connection connection = DriverManager.getConnection(databaseURL);

			Statement statement = connection.createStatement();
			ResultSet resultSet = statement.executeQuery(query);

			while (resultSet.next()) {
					String gameName = resultSet.getString("Game_Name");
					String gamePublisherEu = resultSet.getString("Game_Publisher_EU");
					String gamePublisherJp = resultSet.getString("Game_Publisher_JP");
					String gamePublisherNa = resultSet.getString("Game_Publisher_NA");
				
					
					
					if (gamePublisherEu.equals(gamePublisherJp) && gamePublisherJp.equals(gamePublisherNa) && gamePublisherEu.equals(gamePublisherNa)) {
						result += gameName + ", ";
					}
			
			}
			statement.close();
			connection.close();

		} catch (SQLException e) {
			e.printStackTrace();
		}
		// The substring removes the last New line in the String.
		return result.substring(0, result.length() - 2);
	}
	
	public String checkAllDifferentPublishers() {
		String result = "";
		String query = "SELECT Game_Name, Game_Publisher_EU, Game_Publisher_JP, Game_Publisher_NA FROM Games";

		try {
			Connection connection = DriverManager.getConnection(databaseURL);

			Statement statement = connection.createStatement();
			ResultSet resultSet = statement.executeQuery(query);

			while (resultSet.next()) {
					String gameName = resultSet.getString("Game_Name");
					String gamePublisherEu = resultSet.getString("Game_Publisher_EU");
					String gamePublisherJp = resultSet.getString("Game_Publisher_JP");
					String gamePublisherNa = resultSet.getString("Game_Publisher_NA");
				
					
					
					if (!gamePublisherEu.equals(gamePublisherJp) && !gamePublisherJp.equals(gamePublisherNa) && !gamePublisherEu.equals(gamePublisherNa)) {
						result += gameName + ", ";
					}
			
			}
			statement.close();
			connection.close();

		} catch (SQLException e) {
			e.printStackTrace();
		}
		// The substring removes the last New line in the String.
		return result.substring(0, result.length() - 2);
	}
}