New servlet containing all survey results

Makefile

@@ -25,6 +25,7 @@ dumptables:
 	sqlite3 $(DB_NAME) "SELECT * FROM Respondents;"
 	sqlite3 $(DB_NAME) "SELECT * FROM Answers;"
 	sqlite3 $(DB_NAME) "SELECT * FROM ProjectDetails;"
+	sqlite3 $(DB_NAME) "SELECT * FROM SurveyResults;"
 
 # Phony targets
 .PHONY: all init_db clean

database.sql

@@ -1,18 +1,35 @@
-CREATE TABLE IF NOT EXISTS Respondents (
+CREATE TABLE
-    name VARCHAR(255) PRIMARY KEY
+    IF NOT EXISTS Respondents (name VARCHAR(255) PRIMARY KEY);
-);
 
-CREATE TABLE IF NOT EXISTS Answers (
+CREATE TABLE
+    IF NOT EXISTS Answers (
         answerOne INT,
         answerTwo INT,
         answerThree INT,
         answerFour INT,
-    name VARCHAR(255),
+        name VARCHAR(255) NOT NULL,
-    FOREIGN KEY (name) REFERENCES Respondents(name)
+        projectName VARCHAR(255) NOT NULL,
-);
+        FOREIGN KEY (name) REFERENCES Respondents (name),
+        FOREIGN KEY (projectName) REFERENCES ProjectDetails (projectName)
+    );
 
-CREATE TABLE IF NOT EXISTS ProjectDetails (
+CREATE TABLE
-    projectID INT PRIMARY KEY,
+    IF NOT EXISTS ProjectDetails (
-    projectName VARCHAR(255),
+        projectName VARCHAR(255) PRIMARY KEY,
         projectDescription TEXT
-);
+    );
+
+CREATE VIEW
+    IF NOT EXISTS SurveyResults AS
+SELECT
+    Respondents.name,
+    Answers.answerOne,
+    Answers.answerTwo,
+    Answers.answerThree,
+    Answers.answerFour,
+    Answers.projectName,
+    ProjectDetails.projectDescription
+FROM
+    Respondents
+    JOIN Answers ON Respondents.name = Answers.name
+    JOIN ProjectDetails ON Answers.projectName = ProjectDetails.projectName;

src/main/java/servlet/Database.java

@@ -66,8 +66,8 @@ public class Database implements AutoCloseable {
 		}
 	}
 
-	public boolean addAnswer(String name, String answerOne, String answerTwo, String answerThree, String answerFour) {
+	public boolean addAnswer(String name, String projectName, String answerOne, String answerTwo, String answerThree, String answerFour) {
-		String sql = "insert into Answers (answerOne, answerTwo, answerThree, answerFour, name) values(?,?,?,?,?)";
+		String sql = "insert into Answers (answerOne, answerTwo, answerThree, answerFour, name, projectName) values(?,?,?,?,?,?)";
 
 		try (PreparedStatement ps = conn.prepareStatement(sql)) {
 			ps.setString(1, answerOne);
@@ -75,6 +75,7 @@ public class Database implements AutoCloseable {
 			ps.setString(3, answerThree);
 			ps.setString(4, answerFour);
 			ps.setString(5, name);
+			ps.setString(6, projectName);
 			ps.executeUpdate();
 			return true;
 		} catch (SQLException e) {
@@ -86,7 +87,32 @@ public class Database implements AutoCloseable {
 			}
 			return false;
 		}
+	}
 
+	/**
+	 * Get all the survey results from the database
+	 */
+	public SurveyResult[] getSurveyResults() {
+		String sql = "select * from SurveyResults";
+		try (Statement stmt = conn.createStatement()) {
+			ResultSet rs = stmt.executeQuery(sql);
+			SurveyResult[] results = new SurveyResult[100];
+			int i = 0;
+			while (rs.next()) {
+				String respName = rs.getString("name");
+				String projectName = rs.getString("projectName");
+				String projectDescription = rs.getString("projectDescription");
+				
+				int[] data = { rs.getInt("answerOne"), rs.getInt("answerTwo"), rs.getInt("answerThree"),
+						rs.getInt("answerFour") };
+				results[i] = new SurveyResult(respName, projectName, projectDescription, data);
+				i++;
+			}
+			return results;
+		} catch (SQLException e) {
+			printSqlError(e);
+			return null;
+		}
 	}
 
 	private void printSqlError(SQLException e) {

src/main/java/servlet/FormGenerator.java

@@ -56,4 +56,17 @@ public class FormGenerator {
 		return html;
 	}
 
+	public String resultsTable(SurveyResult[] results) {
+		String html = "<table border=" + formElement("1") + ">";
+		html += "<tr><th>Respondent</th><th>Project</th><th>Description</th><th>Factor 1</th><th>Factor 2</th><th>Factor 3</th><th>Factor 4</th></tr>";
+		for (SurveyResult result : results) {
+			if (result == null)
+				break;
+			html += "<tr><td>" + result.getName() + "</td><td>" + result.getProjectName() + "</td><td>"
+					+ result.getProjectDesc() + "</td><td>" + result.getData()[0] + "</td><td>" + result.getData()[1]
+					+ "</td><td>" + result.getData()[2] + "</td><td>" + result.getData()[3] + "</td></tr>";
+		}
+		html += "</table>";
+		return html;
+	}
 }

src/main/java/servlet/Results.java

@@ -0,0 +1,67 @@
+package servlet;
+
+import java.io.*;
+import java.sql.SQLException;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpSession;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * Servlet implementation class Results.
+ * 
+ * This class is responsible for displaying the results of the survey.
+ * It should be able to display the results of the survey in a table.
+ */
+@WebServlet("/Results")
+public class Results extends HttpServlet {
+	private static final long serialVersionUID = 1L;
+	private Database db = new Database();
+	private FormGenerator formGenerator = new FormGenerator();
+
+	/**
+	 * Default constructor.
+	 */
+	public Results() {
+	}
+
+	/**
+	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
+	 *      response)
+	 */
+	protected void doGet(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, IOException {
+
+		SurveyResult[] results = db.getSurveyResults();
+
+		// SurveyResult[] results = {
+		// 	new SurveyResult("John", "Project 1", new int[] { 1, 2, 3, 4 }),
+		// 	new SurveyResult("Jane", "Project 2", new int[] { 5, 6, 7, 8 }),
+		// 	new SurveyResult("Joe", "Project 3", new int[] { 9, 10, 1, 2 }),
+		// 	new SurveyResult("Jill", "Project 4", new int[] { 3, 4, 5, 6 }),
+		// 	new SurveyResult("Jack", "Project 5", new int[] { 7, 8, 9, 10 }),
+		// };
+
+		for (SurveyResult result : results) {
+			if (result == null)
+				break;
+			System.out.println(result.toString());
+		}
+
+		// Get a writer
+		PrintWriter out = response.getWriter();
+		out.println(formGenerator.resultsTable(results));
+	}
+
+	/**
+	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
+	 *      response)
+	 */
+	protected void doPost(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, IOException {
+		doGet(request, response);
+	}
+}

src/main/java/servlet/Survey.java

@@ -105,6 +105,7 @@ public class Survey extends HttpServlet {
 					name = (String) session.getAttribute("name");
 					String description = request.getParameter("proj_desc");
 					String proj_name = request.getParameter("proj_name");
+					session.setAttribute("proj_name", proj_name);
 					System.out.println("description: " + description);
 					if (description != null) {
 						state = NEED_PROJECT_DATA;
@@ -138,11 +139,14 @@ public class Survey extends HttpServlet {
 						// display the next page
 						if (valuesOk) {
 							int sum = s11 + s12 + s13 + s14;
-							db.addAnswer(name, s11String, s12String, s13String, s14String);
+							// db.addAnswer(name, s11String, s12String, s13String, s14String);
+							db.addAnswer(name, (String) session.getAttribute("proj_name"), s11String, s12String, s13String,
+									s14String);
 							// This is only to show that it is possible to do something with the values.
 							// It is of course meaningless to calculate the sum.
 							out.println("<p> Hello " + name);
 							out.println("<p> The sum of the values you entered is " + sum);
+							out.println("<p>To view other results, click <a href=\"Results\">here</a>");
 							sessionShouldBeEnded = true;
 						} else {
 							out.println("The values you entered were not OK");

src/main/java/servlet/SurveyResult.java

@@ -0,0 +1,36 @@
+package servlet;
+
+public class SurveyResult {
+    private String respName;
+    private String projectName;
+    private String projectDesc;
+    private int[] data;
+
+    public SurveyResult(String respName, String projectName, String projectDesc, int[] data) {
+        this.respName = respName;
+        this.projectName = projectName;
+        this.projectDesc = projectDesc;
+        this.data = data;
+    }
+
+    public String getName() {
+        return respName;
+    }
+
+    public String getProjectName() {
+        return projectName;
+    }
+
+    public String getProjectDesc() {
+        return projectDesc;
+    }
+
+    public int[] getData() {
+        return data;
+    }
+
+    public String toString() {
+        return String.format("Name: %s, Project: %s, Project Description: %s, Data: %d, %d, %d, %d", respName,
+                projectName, projectDesc, data[0], data[1], data[2], data[3]);
+    }
+}