+ database handling for orders

src/main/java/de/hsel/itech/db/Database.java

@@ -37,6 +37,8 @@ public class Database {
     final String tableUserAddress = "user_address";
     final String tableAddress = "address";
     final String tableCartBooks = "cart_books";
+    final String tableOrder = "order";
+    final String tableOrderBook = "order_book";
 
     private AuthorDB authorDB;
     private BookDB bookDB;
@@ -45,6 +47,7 @@ public class Database {
     private UserDB userDB;
     private AddressDB addressDB;
     private ShoppingCartDB shoppingCartDB;
+    private OrderDB orderDB;
 
     private static Database instance;
 
@@ -158,10 +161,16 @@ public class Database {
         return shoppingCartDB;
     }
 
+    @Contract
+    public OrderDB order() {
+        if(orderDB == null)
+            orderDB = new OrderDB(this);
+        return orderDB;
+    }
 
 
     /**
-     * deletes id from table.
+     * deletes entry from table.
      *
      * @param id    database id
      * @param table table name
@@ -184,6 +193,31 @@ public class Database {
         return deleteCount;
     }
 
+    /**
+     * deletes entry from table.
+     *
+     * @param id id of entry to delete
+     * @param table table to delete from
+     * @param column column to delete id from
+     * @return deletion count
+     */
+    int delete(long id, @NotNull String table, @NotNull String column) {
+        Connection connection = getConnection();
+        assert connection != null;
+
+        int deleteCount = 0;
+        try {
+            PreparedStatement statement = connection.prepareStatement("DELETE FROM " + table + " WHERE " + column + "=?");
+            statement.setLong(1, id);
+
+            deleteCount = +statement.executeUpdate();
+
+        } catch (SQLException ex) {
+            ex.printStackTrace();
+        }
+        return deleteCount;
+    }
+
     /**
      * getAll all ids from specified table.
      *

src/main/java/de/hsel/itech/db/OrderDB.java

@@ -0,0 +1,108 @@
+package de.hsel.itech.db;
+
+import de.hsel.itech.db.pojo.*;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class OrderDB {
+
+    private Database database;
+
+    OrderDB(@NotNull Database database) {
+        this.database = database;
+    }
+
+    @Nullable
+    public Order get(long id) {
+        Map.Entry<ResultSet, Connection> entry = database.getResultSetById(database.tableOrder, id);
+        assert entry != null;
+
+        try {
+
+            ResultSet rs = entry.getKey();
+            List<OrderItem> items = getItems(id);
+            //TODO: change this once database handling for payment stuff is done
+            Payment payment = null;
+            Address address = database.address().get(rs.getLong("address"));
+            Order order = new Order(id, database.user().get(rs.getLong("user")), items, rs.getDate("date"), rs.getLong("price"), payment, address);
+
+            entry.getValue().close();
+            return order;
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private List<OrderItem> getItems(long id) {
+        Map.Entry<ResultSet, Connection> entry = database.getResultSetsById(database.tableOrderBook, "order", id);
+        assert entry != null;
+
+        List<OrderItem> items = new ArrayList<>();
+
+        try {
+            ResultSet rs = entry.getKey();
+            while(rs.next()) {
+                items.add(new OrderItem(database.book().get(rs.getLong("book")), rs.getInt("count")));
+            }
+
+            entry.getValue().close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+
+        return items;
+    }
+
+    public int insert(@NotNull Order order) {
+        Connection connection = database.getConnection();
+        assert connection != null;
+
+        int insertCount = 0;
+
+        try {
+            PreparedStatement statement = connection.prepareStatement("INSERT INTO `order` (user, price, date, paymentType, payment, address) VALUES (?, ?, ?, ?, ?, ?)", Statement.RETURN_GENERATED_KEYS);
+            statement.setLong(1, order.getUser().getId());
+            statement.setLong(2, order.getPrice());
+            statement.setDate(3, order.getDate());
+            statement.setLong(4, order.getPayment().getType().getId());
+            statement.setLong(5, order.getPayment().getId());
+            statement.setLong(6, order.getAddress().getId());
+
+            insertCount += statement.executeUpdate();
+            ResultSet idResultSet = statement.getGeneratedKeys();
+            long lastId = -1;
+            while (idResultSet.next()) {
+                lastId = idResultSet.getLong("id");
+            }
+
+            for(OrderItem item : order.getItems()) {
+                PreparedStatement itemStatement = connection.prepareStatement("INSERT INTO order_book (`order`, book, count) VALUES (?, ?, ?)");
+                itemStatement.setLong(1, lastId);
+                itemStatement.setLong(2, item.getBook().getId());
+                itemStatement.setInt(3, item.getCount());
+
+                insertCount += itemStatement.executeUpdate();
+            }
+
+            connection.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return insertCount;
+    }
+
+    public int delete(@NotNull Order order) {
+        int deleteCount = 0;
+
+        deleteCount += database.delete(order.getId(), database.tableOrder);
+        deleteCount += database.delete(order.getId(), database.tableOrderBook, "order");
+
+        return deleteCount;
+    }
+}

src/main/java/de/hsel/itech/db/pojo/CreditCardPayment.java

@@ -18,9 +18,8 @@ import java.time.LocalDate;
 @Data
 @AllArgsConstructor
 @RequiredArgsConstructor
-public class CreditCardPayment {
+public class CreditCardPayment extends Payment{
 
-    private long id;
     @NonNull private User user;
     @NonNull private int number;
     @NonNull private String owner;

src/main/java/de/hsel/itech/db/pojo/DebitCardPayment.java

@@ -16,9 +16,8 @@ import lombok.RequiredArgsConstructor;
 @Data
 @AllArgsConstructor
 @RequiredArgsConstructor
-public class DebitCardPayment {
+public class DebitCardPayment extends Payment{
 
-    private long id;
     @NonNull private User user;
     @NonNull private String iban;
     @NonNull private String bic;

src/main/java/de/hsel/itech/db/pojo/InvoicePayment.java

@@ -16,8 +16,7 @@ import lombok.RequiredArgsConstructor;
 @Data
 @AllArgsConstructor
 @RequiredArgsConstructor
-public class InvoicePayment {
+public class InvoicePayment extends Payment{
 
-    private long id;
     @NonNull private User user;
 }

src/main/java/de/hsel/itech/db/pojo/Order.java

@@ -5,7 +5,8 @@ import lombok.Data;
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
 
-import java.time.LocalDateTime;
+import java.sql.Date;
+import java.util.List;
 
 
 /**
@@ -22,13 +23,13 @@ import java.time.LocalDateTime;
 public class Order {
 
     private long id;
-    @NonNull private LocalDateTime date;
+    @NonNull private User user;
-    @NonNull private Book book;
+    @NonNull private List<OrderItem> items;
-
+    @NonNull private Date date;
     /**
      * price in cents.
      */
-    @NonNull private int price;
+    @NonNull private long price;
-    @NonNull private PaymentType paymentType;
+    @NonNull private Payment payment;
     @NonNull private Address address;
 }

src/main/java/de/hsel/itech/db/pojo/OrderItem.java

@@ -0,0 +1,19 @@
+package de.hsel.itech.db.pojo;
+
+import lombok.*;
+
+/**
+ * @author Johannes Theiner
+ * @version 0.1
+ * @since 0.5
+ */
+
+@Data
+@AllArgsConstructor
+@RequiredArgsConstructor
+public class OrderItem {
+
+    private Order order;
+    @NonNull private Book book;
+    @NonNull private int count;
+}

src/main/java/de/hsel/itech/db/pojo/PayPalPayment.java

@@ -1,9 +1,8 @@
 package de.hsel.itech.db.pojo;
 
-import lombok.AllArgsConstructor;
 import lombok.Data;
+import lombok.EqualsAndHashCode;
 import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
 
 /**
  * POJO for PayPal Payment.
@@ -13,13 +12,18 @@ import lombok.RequiredArgsConstructor;
  * @since 0.1
  **/
 
+@EqualsAndHashCode(callSuper = true)
 @Data
-@AllArgsConstructor
+public class PayPalPayment extends Payment{
-@RequiredArgsConstructor
-public class PayPalPayment {
 
-    private long id;
     @NonNull private User user;
     @NonNull private String email;
     @NonNull private String authCode;
+
+    public PayPalPayment(long id, User user, String email, String authCode) {
+        super(id, new PaymentType(2, "PayPal"));
+        this.user = user;
+        this.email = email;
+        this.authCode = authCode;
+    }
 }

src/main/java/de/hsel/itech/db/pojo/Payment.java

@@ -0,0 +1,14 @@
+package de.hsel.itech.db.pojo;
+
+
+import lombok.*;
+
+@Data
+@NoArgsConstructor
+@RequiredArgsConstructor
+@AllArgsConstructor
+public class Payment {
+
+    private long id;
+    @NonNull private PaymentType type;
+}

src/main/java/de/hsel/itech/db/pojo/ShoppingCartItem.java

@@ -1,6 +1,5 @@
 package de.hsel.itech.db.pojo;
 
-import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
@@ -14,7 +13,6 @@ import lombok.RequiredArgsConstructor;
  **/
 
 @Data
-@AllArgsConstructor
 @RequiredArgsConstructor
 public class ShoppingCartItem {