From fbd9119756d1c520bcc1f325e70888df3f77c455 Mon Sep 17 00:00:00 2001
From: CAMOPKAH <SingleXXX@Mail.ru>
Date: Fri, 21 Feb 2020 10:19:01 +0300
Subject: [PATCH] Bimaev Oleg

---
 task2/src/main/java/DBUtility.java | 112 +++++++++++++++++++++++++----
 1 file changed, 97 insertions(+), 15 deletions(-)

diff --git a/task2/src/main/java/DBUtility.java b/task2/src/main/java/DBUtility.java
index 0e67b06..40f4fea 100644
--- a/task2/src/main/java/DBUtility.java
+++ b/task2/src/main/java/DBUtility.java
@@ -18,13 +18,55 @@ public class DBUtility {
      */
 
 
-    void AddPrinters(Statement stmt){
-        // TODO: 16.12.2019  
+    void AddPrinters(Statement stmt) {
+        //Предзаполняем массив с принтерами
+        ArrayList<Printer> PrinterMass = new ArrayList<>();
+
+        PrinterMass.add(new Printer(1012,"HP", "col", "lase", 20000));
+        PrinterMass.add(new Printer(1010,"Canon", "bw", "jet", 5000));
+        PrinterMass.add(new Printer(1010,"Canon", "bw", "jet", 5000));
+
+        try {
+        //Генирируем SQL Batch для вставки принтеров
+        for (Printer pM : PrinterMass) {
+
+                stmt.addBatch("INSERT INTO Printer ( model, maker, color, type, price)" +
+                "VALUES ( '  " + pM.getModel() + "  ','" + pM.getMaker() + "','" + pM.getColor() + "','" + pM.getType() + "','" + pM.getPrice() + "');");
+
+
+        }
+        //Выполняем предзаполненый список запросов
+        stmt.executeBatch();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+
+        /* При каждой вставке происходит выполнение тригера product_BI
+        CREATE TRIGGER product_BI BEFORE INSERT ON Product FOR EACH ROW BEGIN     INSERT INTO Product ( maker, model,type)  VALUES (new.maker,
+                            new.model,
+                            'Printer'
+                        );
+END;
+
+
+         */
     }
 
 
-    public void createPrinterTable(Connection con, Statement  stmt){
-        // TODO: 16.12.2019  
+    public void createPrinterTable(Connection con, Statement  stmt) {
+
+        try {
+        stmt.addBatch("CREATE TABLE IF NOT EXISTS Printer (id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE " +
+                ", model INTEGER, maker TEXT, color TEXT, type TEXT, price INTEGER);");
+        stmt.addBatch("CREATE TRIGGER  IF NOT EXISTS product_BI BEFORE INSERT ON Product FOR EACH ROW BEGIN     INSERT INTO Product ( maker, model,type)  VALUES (new.maker, new.model, 'Printer');");
+            //Выполняем предзаполненый список запросов
+        stmt.executeBatch();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        AddPrinters(stmt);
+
+
     }
 
     /*
@@ -32,8 +74,19 @@ public void createPrinterTable(Connection con, Statement  stmt){
      */
 
     public ArrayList<String> selectExpensivePC(Statement stmt){
-        //todo
-        return null;
+        ArrayList<String> Result = new ArrayList<>();
+        try {
+        //Запрос
+        ResultSet rSet = stmt.executeQuery("SELECT DISTINCT model FROM PC WHERE PRICE > 15000");
+        //Перебираем результат
+        while (rSet.next()) {
+            Result.add(rSet.getString("model"));
+        }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return Result;
+
     }
 
     /*
@@ -41,19 +94,38 @@ public ArrayList<String> selectExpensivePC(Statement stmt){
      * которых выше чем 2500
      */
 
-    public ArrayList<Integer> selectQuickLaptop(Statement stmt) {
-        // TODO: 16.12.2019  
-        return null;
+    public ArrayList<Integer> selectQuickLaptop(Statement stmt)  {
+        ArrayList<Integer> Result = new ArrayList<>();
+        try {
+        //Запрос
+        ResultSet rSet = stmt.executeQuery("SELECT id FROM PC WHERE speed > 2500;");
+        //Перебираем результат
+        while (rSet.next()) {
+            Result.add(rSet.getInt ("id"));
+        }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return Result;
     }
 
     /*
      * Метод должен вернуть список производителей которые
      *  делают и пк и ноутбуки
      */
-    public ArrayList<String> selectMaker(Statement stmt){
-        ArrayList<String> ans = new ArrayList<>();
-        // TODO: 18.02.2020
-        return ans;
+    public ArrayList<String> selectMaker(Statement stmt)  {
+        ArrayList<String> Result = new ArrayList<>();
+        try {
+        //Запрос
+        ResultSet rSet = stmt.executeQuery("SELECT maker, COUNT() FROM (SELECT DISTINCT maker, type FROM Product WHERE type in ('Laptop', 'PC') ) GROUP BY maker HAVING COUNT()>1;");
+        //Перебираем результат
+        while (rSet.next()) {
+            Result.add(rSet.getString("maker"));
+        }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return Result;
     }
 
     /*
@@ -65,9 +137,19 @@ public ArrayList<String> selectMaker(Statement stmt){
      * или сделать любым другим способом
      */
 
-    public int makerWithMaxProceeds(Statement stmt){
+    public int makerWithMaxProceeds(Statement stmt)  {
         int result = 0;
-        //todo
+        try {
+        ResultSet rSet = stmt.executeQuery("SELECT p.maker,SUM(A_mod.price) M_SUM FROM (SELECT model, price  FROM PC UNION ALL SELECT model, price FROM Laptop) A_mod, (SELECT DISTINCT * FROM product pp) p  WHERE p.model=A_mod.model  GROUP BY p.maker  ORDER BY 2 DESC;");
+        //Перебираем результат
+        while (rSet.next()) {
+            result = rSet.getInt ("M_SUM");
+            break;
+        }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+
         return result;
 
     }