From c8eaea665bd7318fe1b99a877706c96f395b3a93 Mon Sep 17 00:00:00 2001
From: koz01 <koz01@PCFEIB104-008.msad.vsb.cz>
Date: Wed, 16 Nov 2022 12:14:07 +0100
Subject: [PATCH] solution
---
pom.xml | 9 +-
src/main/java/lab/GameController.java | 22 ++---
src/main/java/lab/Score.java | 19 +++-
src/main/java/lab/ScoreDAO.java | 128 ++++++++++++++++++++++++++
src/main/java/module-info.java | 1 +
5 files changed, 158 insertions(+), 21 deletions(-)
create mode 100644 src/main/java/lab/ScoreDAO.java
diff --git a/pom.xml b/pom.xml
index 6bd5f99..3f573e8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,6 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>vsb-cs-java1</groupId>
<artifactId>lab08</artifactId>
@@ -12,6 +10,11 @@
<maven.compiler.target>17</maven.compiler.target>
</properties>
<dependencies>
+ <dependency>
+ <groupId>org.apache.derby</groupId>
+ <artifactId>derby</artifactId>
+ <version>10.16.1.1</version>
+ </dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
diff --git a/src/main/java/lab/GameController.java b/src/main/java/lab/GameController.java
index 2fee0eb..d06114d 100644
--- a/src/main/java/lab/GameController.java
+++ b/src/main/java/lab/GameController.java
@@ -1,10 +1,6 @@
package lab;
-import java.io.BufferedReader;
-import java.io.FileReader;
-import java.io.FileWriter;
import java.io.IOException;
-import java.io.PrintWriter;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
@@ -51,10 +47,13 @@ public class GameController {
private AnimationTimer animationTimer;
+ private ScoreDAO scoreDAO;
+
public GameController() {
}
public void startGame() {
+ scoreDAO = new ScoreDAO();
initScoreList();
this.world = new World(canvas.getWidth(), canvas.getHeight());
@@ -110,24 +109,15 @@ public class GameController {
@FXML
private void savePressed() throws IOException {
- try(PrintWriter pw = new PrintWriter(new FileWriter("high_score.csv"))){
- for(Score score: highScores) {
- pw.printf("%s;%d\n", score.getName(), score.getScore());
- }
- }
+ scoreDAO.save(highScores);
}
@FXML
private void loadPressed() throws IOException{
highScores.clear();
- try(BufferedReader br = new BufferedReader(new FileReader("high_score.csv"))){
- String line;
- while(null != (line = br.readLine())) {
- String [] tokens = line.split(";");
- highScores.add(new Score(Integer.parseInt(tokens[1]), tokens[0]));
- }
- }
+ highScores.addAll(scoreDAO.load());
+ sortScores();
initScoreList();
}
diff --git a/src/main/java/lab/Score.java b/src/main/java/lab/Score.java
index e7f8bc7..a64c2b3 100644
--- a/src/main/java/lab/Score.java
+++ b/src/main/java/lab/Score.java
@@ -5,11 +5,18 @@ import java.io.Serializable;
public class Score implements Serializable{
private static final long serialVersionUID = 712213568495641939L;
-
+ private Integer id;
private final int score;
private final String name;
+
+
public Score(int score, String name) {
- super();
+ this(null, score, name);
+ }
+
+
+ public Score(Integer id, int score, String name) {
+ this.id = id;
this.score = score;
this.name = name;
}
@@ -22,6 +29,14 @@ public class Score implements Serializable{
public int getScore() {
return score;
}
+
+ public Integer getId() {
+ return id;
+ }
+
+ public void setId(Integer id) {
+ this.id = id;
+ }
@Override
public String toString() {
diff --git a/src/main/java/lab/ScoreDAO.java b/src/main/java/lab/ScoreDAO.java
new file mode 100644
index 0000000..8bfdc72
--- /dev/null
+++ b/src/main/java/lab/ScoreDAO.java
@@ -0,0 +1,128 @@
+package lab;
+
+import static java.util.stream.Collectors.toSet;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ScoreDAO {
+
+ public ScoreDAO() {
+
+ try (Connection conn = getConnection()) {
+ createTable(conn);
+ } catch (SQLException e) {
+ e.printStackTrace();
+ }
+ }
+
+ public List<Score> load( ){
+ List<Score> result = new LinkedList<>();
+ try(Connection con = getConnection(); Statement stmt = con.createStatement()) {
+ try(ResultSet rs = stmt.executeQuery("SELECT id, value, name FROM score")) {
+ while (rs.next()) {
+ result.add(new Score(rs.getInt(1), rs.getInt(2), rs.getString(3)));
+ }
+ }
+ } catch (SQLException e) {
+ e.printStackTrace();
+ }
+ return result ;
+ }
+
+ public void save(List<Score> scores) {
+
+ /*Set<Integer> m = new HashSet<>();
+ for (Score score: scores) {
+ if (score.getId() == null) {
+ continue;
+ }
+ m.add(score.getId());
+ }*/
+ Set<Integer> m = scores.stream()
+ .filter(s -> s.getId() != null)
+ .map(Score::getId)
+ .collect(toSet());
+ Set<Integer> d = load().stream().map(Score::getId).collect(Collectors.toSet());
+ d.removeAll(m);
+ Set<Integer> idsOnlyInDB = d;
+ removeByIDS(idsOnlyInDB);
+ List<Score> scoreSaved = new LinkedList<>();
+ try (Connection con = getConnection();
+ PreparedStatement pstmt = con.prepareStatement("INSERT INTO score (value, name) VALUES (?, ?)"
+ , Statement.RETURN_GENERATED_KEYS)) {
+ for (Score score: scores) {
+ if (score.getId() != null) {
+ continue;
+ }
+ pstmt.setInt(1, score.getScore());
+ pstmt.setString(2, score.getName());
+ pstmt.addBatch();
+ scoreSaved.add(score);
+ }
+ if (!scoreSaved.isEmpty()) {
+ pstmt.executeBatch();
+ ResultSet rs = pstmt.getGeneratedKeys();
+ Iterator<Score> iter = scoreSaved.iterator();
+ while (rs.next()) {
+ Score score = iter.next();
+ score.setId(rs.getInt(1));
+ }
+ }
+
+ } catch (SQLException e) {
+ e.printStackTrace();
+ }
+ }
+
+ private void removeByIDS(Set<Integer> idsOnlyInDB) {
+ try(Connection con = getConnection();
+ PreparedStatement pstmt = con.prepareStatement("DELETE FROM score WHERE id = ?")) {
+
+ for (Integer id: idsOnlyInDB) {
+ pstmt.setInt(1, id);
+ pstmt.addBatch();
+ }
+ pstmt.executeBatch();
+ } catch (SQLException e) {
+ e.printStackTrace();
+ }
+
+ }
+
+ private void createTable(Connection conn) {
+ try (Statement stmt = conn.createStatement()){
+ stmt.execute("CREATE TABLE score ("
+ + "id INT NOT NULL GENERATED ALWAYS AS IDENTITY, "
+ + "value INT NOT NULL, "
+ + "name VARCHAR(255) NOT NULL, "
+ + "PRIMARY KEY (id)"
+ + ")");
+ } catch (SQLException e) {
+ if (e.getSQLState().equals("X0Y32")) {
+ //ignore this because table exists
+ return;
+ }
+ e.printStackTrace();
+ }
+
+ }
+
+ private Connection getConnection() {
+ try {
+ return DriverManager.getConnection("jdbc:derby:scoreDB;create=true");
+ } catch (SQLException e) {
+ e.printStackTrace();
+ return null;
+ }
+ }
+}
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index 7006c78..94ff2e3 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -1,6 +1,7 @@
module lab01 {
requires transitive javafx.controls;
requires javafx.fxml;
+ requires java.sql;
opens lab to javafx.fxml;
exports lab;
}
\ No newline at end of file
--
GitLab