~ small fixes and code cleanup

Signed-off-by: Johannes Theiner <j.theiner@live.de>

#SPM-31: add work 20m testing

src/main/java/de/hsel/spm/baudas/analysis/ShoppingCart.java

@@ -33,8 +33,6 @@ public class ShoppingCart implements Analysis<Map<List<String>, List<String>>> {
 
         result = new HashMap<>();
 
-        Apriori model = new Apriori();
-
         for (int i = 0; i < 11; i++) {
             instances.deleteAttributeAt(0);
         }
@@ -60,6 +58,8 @@ public class ShoppingCart implements Analysis<Map<List<String>, List<String>>> {
             e.printStackTrace();
         }
 
+        Apriori model = new Apriori();
+
         model.setTreatZeroAsMissing(true);
         try {
             model.buildAssociations(instances);

src/main/java/de/hsel/spm/baudas/web/ErrorCode.java

@@ -3,12 +3,33 @@ package de.hsel.spm.baudas.web;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 
+/**
+ * all possible error codes.
+ *
+ * @author Julian Hinxlage
+ * @version 0.1
+ */
 @Getter
 @AllArgsConstructor
 public enum ErrorCode {
-    FILE_NOT_FOUND ("Die Hochgeladene Datei konnte nicht gefunden werden"),
-    EMPTY_FILE ("Die Hochgeladene Datei ist leer"),
-    INVALID_FORMAT("Die Hochgeladene Datei hat ein falsches Format");
+    FILE_NOT_FOUND("Die hochgeladene Datei konnte nicht gefunden werden"),
+    EMPTY_FILE("Die hochgeladene Datei ist leer"),
+    INVALID_FORMAT("Die hochgeladene Datei hat ein falsches Format");
 
     private String message;
+
+    /**
+     * is there a error code with this name ?.
+     *
+     * @param message string to search for
+     * @return error code exits ?
+     */
+    public static boolean exists(String message) {
+        for (ErrorCode code : values()) {
+            System.out.println(message + " == " + code.name());
+            if (code.name().equals(message))
+                return true;
+        }
+        return false;
+    }
 }

src/main/java/de/hsel/spm/baudas/web/Upload.java

@@ -21,7 +21,7 @@ import java.nio.file.StandardCopyOption;
 /**
  * saves uploaded files.
  *
- * @author Johannes Theiner
+ * @author Johannes Theiner, Julian Hinxlage
  * @version 0.1
  * @since 0.1
  **/
@@ -32,20 +32,24 @@ public class Upload extends HttpServlet {
 
     private static final long serialVersionUID = 14144111845151L;
 
-
+    /**
+     * let weka check if the format is valid.
+     *
+     * @param stream input stream
+     * @return format valid
+     */
     private boolean checkFormat(InputStream stream) {
         CSVLoader loader = new CSVLoader();
         try {
             loader.setSource(stream);
             return loader.getDataSet() != null;
-        } catch (IOException e) {
+        } catch (Exception e) {
             return false;
         }
     }
 
     @Override
-    protected void doPost(@NotNull HttpServletRequest req, HttpServletResponse resp)
-            throws ServletException, IOException {
+    protected void doPost(@NotNull HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
         req.setCharacterEncoding(StandardCharsets.UTF_8.name());
 
         Part filePart = req.getPart("file");

src/main/webapp/error.jsp

@@ -1,13 +1,8 @@
-<%--
-  Created by IntelliJ IDEA.
-  User: julian
-  Date: 21.05.19
-  Time: 14:21
-  To change this template use File | Settings | File Templates.
---%>
-
-<%@ page import="java.nio.charset.StandardCharsets" %>
 <%@ page import="de.hsel.spm.baudas.web.ErrorCode" %>
+<%@ page import="java.nio.charset.StandardCharsets" %>
+<%@ page import="java.util.List" %>
+<%@ page import="java.util.Arrays" %>
+<%@ page import="java.util.ArrayList" %>
 <%@ page contentType="text/html;charset=UTF-8" %>
 <%@include file="emptyHeader.jsp"%>
 <% response.setCharacterEncoding(StandardCharsets.UTF_8.name()); %>
@@ -15,7 +10,8 @@
 
 <%
     String code = request.getParameter("code");
-    if(code != null){
+
+    if(code != null && ErrorCode.exists(code)){
         ErrorCode errorCode = ErrorCode.valueOf(code);
 %>