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add active records for genre, moviecharacter and person

This commit is contained in:
Luca Conte 2023-11-20 10:43:02 +01:00
parent b14c87f0c9
commit bed6e663d2
7 changed files with 327 additions and 11 deletions
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bonus-1/sqlite-test.db Normal file
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bonus-1/src/ActiveRecord.java Normal file
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import java.sql.SQLException;
public interface ActiveRecord {
public void insert() throws SQLException;
public void update() throws SQLException;
public void delete() throws SQLException;
}

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bonus-1/src/ConnectionManager.java Normal file
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import java.sql.*;
public class ConnectionManager {
private static Connection connection;
public static void connect() {
try {
connection = DriverManager.getConnection("jdbc:sqlite:sqlite-test.db");
connection.setAutoCommit(false);
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void disconnect() {
try {
connection.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static Connection getConnection() {
return connection;
}
}

74
bonus-1/src/Genre.java Normal file
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import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
public class Genre implements ActiveRecord {
private long genreId;
private String genre;
public Genre(long genreId, String genre) {
this.genreId = genreId;
this.genre = genre;
}
public String getGenre() {
return genre;
}
public void setGenre(String genre) {
this.genre = genre;
}
public long getGenreId() {
return genreId;
}
@Override
public void insert() throws SQLException {
String sql = "INSERT INTO `Genre` VALUES (?, ?);";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setLong(1, this.genreId);
ps.setString(2, this.genre);
ps.executeUpdate();
}
}
@Override
public void update() throws SQLException {
String sql = "UPDATE `Genre` SET `Genre`=? WHERE `GenreID`=?";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setString(1, this.genre);
ps.setLong(2, this.genreId);
ps.executeUpdate();
}
}
@Override
public void delete() throws SQLException {
String sql = "DELETE FROM `Genre` WHERE `GenreID`=?";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setLong(1, this.genreId);
ps.executeUpdate();
}
}
public String toString() {
return "Genre: " + this.genre;
}
public static ArrayList<Genre> findAll() throws SQLException {
String sql = "SELECT * FROM Genre";
ArrayList<Genre> genres = new ArrayList<Genre>();
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
try (ResultSet rs = ps.executeQuery()) {
int i = 0;
while (rs.next()) {
genres.add(new Genre(rs.getLong("GenreID"), rs.getString("Genre")));
}
}
}
return genres;
}
}

37
bonus-1/src/Main.java
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import java.sql.*;
public class Main {
public static void main(String[] args) {
try (Connection conn = DriverManager.getConnection("jdbc:sqlite:/home/local/sqlite-test.db")) {
System.out.println("Connection successful.");
PreparedStatement s = conn.prepareStatement("SELECT * FROM test;");
ResultSet r = s.executeQuery();
while (r.next()) {
System.out.println(r.getInt("id") + " | " + r.getString("name"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
public static void main(String[] args) throws SQLException {
ConnectionManager.connect();
Person p = new Person(0, "Mueller", 'M');
p.insert();
for (Person ps : Person.findAll()) {
System.out.println(ps);
}
Genre g = new Genre(0, "Horror");
g.insert();
for (Genre gs : Genre.findAll()) {
System.out.println(gs);
}
MovieCharacter mc = new MovieCharacter(0, "Peter Lustig", "Peter Unlustig", 1, p.getPersonID());
mc.insert();
for (MovieCharacter mcs : MovieCharacter.findAll()) {
System.out.println(mcs);
}
ConnectionManager.disconnect();
}
}

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bonus-1/src/MovieCharacter.java Normal file
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import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
public class MovieCharacter implements ActiveRecord {
private long movCharId;
private String character;
private String alias;
private int position;
private long playedBy;
public MovieCharacter(long movCharId, String character, String alias, int position, long playedBy) {
this.movCharId = movCharId;
this.character = character;
this.alias = alias;
this.position = position;
this.playedBy = playedBy;
}
public String getCharacter() {
return character;
}
public void setCharacter(String character) {
this.character = character;
}
public String getAlias() {
return alias;
}
public void setAlias(String alias) {
this.alias = alias;
}
public int getPosition() {
return position;
}
public void setPosition(int position) {
this.position = position;
}
public long getPlayedBy() {
return playedBy;
}
public void setPlayedBy(long playedBy) {
this.playedBy = playedBy;
}
public long getMovCharId() {
return movCharId;
}
@Override
public void insert() throws SQLException {
String sql = "INSERT INTO `MovieCharacter` VALUES (?, ?, ?, ?, ?);";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setLong(1, this.movCharId);
ps.setString(2, this.character);
ps.setString(3, this.alias);
ps.setInt(4, this.position);
ps.setLong(5, this.playedBy);
ps.executeUpdate();
}
}
@Override
public void update() throws SQLException {
String sql = "UPDATE `MovieCharacter` SET `Character`=?, `Alias`=?, `Position`=?, `PlayedBy`=? WHERE `MovCharID`=?";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setString(1, this.character);
ps.setString(2, this.alias);
ps.setInt(3, this.position);
ps.setLong(4, this.playedBy);
ps.setLong(5, this.movCharId);
ps.executeUpdate();
}
}
@Override
public void delete() throws SQLException {
String sql = "DELETE FROM `MovieCharacter` WHERE `MovCharID`=?";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setLong(1, this.movCharId);
ps.executeUpdate();
}
}
@Override
public String toString() {
return "Character: " + this.movCharId + " : " + this.character + " aka. " + this.alias + " - " + this.position + " : " + this.playedBy;
}
public static ArrayList<MovieCharacter> findAll() throws SQLException {
String sql = "SELECT * FROM MovieCharacter";
ArrayList<MovieCharacter> movieCharacters = new ArrayList<MovieCharacter>();
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
try (ResultSet rs = ps.executeQuery()) {
int i = 0;
while (rs.next()) {
movieCharacters.add(new MovieCharacter(rs.getLong("MovCharID"), rs.getString("Character"), rs.getString("Alias"), rs.getInt("Position"), rs.getLong("PlayedBy")));
}
}
}
return movieCharacters;
}
}

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bonus-1/src/Person.java Normal file
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import java.sql.*;
import java.util.ArrayList;
public class Person implements ActiveRecord {
private long personId;
private String name;
private char sex;
public Person(long personId, String name, char sex) {
this.personId = personId;
this.name = name;
this.sex = sex;
}
public long getPersonID() {
return personId;
}
public String getName() {
return name;
}
public char getSex() {
return sex;
}
public void setName(String name) {
this.name = name;
}
public void setSex(char sex) {
this.sex = sex;
}
@Override
public void insert() throws SQLException {
String sql = "INSERT INTO `Person` VALUES (?, ?, ?);";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setLong(1, this.personId);
ps.setString(2, this.name);
ps.setString(3, "" + this.sex);
ps.executeUpdate();
}
}
@Override
public void update() throws SQLException {
String sql = "UPDATE `Person` SET `Name`=?, `Sex`=? WHERE `PersonID`=?";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setString(1, this.name);
ps.setString(2, "" + this.sex);
ps.setLong(3, this.personId);
ps.executeUpdate();
}
}
@Override
public void delete() throws SQLException {
String sql = "DELETE FROM `Person` WHERE `PersonID`=?";
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
ps.setLong(1, this.personId);
ps.executeUpdate();
}
}
public String toString() {
return "Person: " + this.personId + " : " + this.name + " : " + this.sex;
}
public static ArrayList<Person> findAll() throws SQLException {
String sql = "SELECT * FROM Person";
ArrayList<Person> personen = new ArrayList<Person>();
try (PreparedStatement ps = ConnectionManager.getConnection().prepareStatement(sql)) {
try (ResultSet rs = ps.executeQuery()) {
int i = 0;
while (rs.next()) {
personen.add(new Person(rs.getLong("PersonID"), rs.getString("Name"), rs.getString("Sex").charAt(0)));
}
}
}
return personen;
}
}