From 4a4fd1c6817f629ce38f9831dbc232ce614699df Mon Sep 17 00:00:00 2001
From: Karsten <karstened@gmail.com>
Date: Sun, 5 May 2019 18:25:05 +0200
Subject: [PATCH 1/2] Top Flop Articles Analysis Done

---
 .../spm/baudas/analysis/TopFlopArticle.java   | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/main/java/de/hsel/spm/baudas/analysis/TopFlopArticle.java

diff --git a/src/main/java/de/hsel/spm/baudas/analysis/TopFlopArticle.java b/src/main/java/de/hsel/spm/baudas/analysis/TopFlopArticle.java
new file mode 100644
index 0000000..b8a24dc
--- /dev/null
+++ b/src/main/java/de/hsel/spm/baudas/analysis/TopFlopArticle.java
@@ -0,0 +1,53 @@
+package de.hsel.spm.baudas.analysis;
+
+import java.io.*;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import weka.core.Instance;
+import weka.core.Instances;
+
+/**
+ * @author Karsten Eden
+ * @version 0.1
+ * @since 0.1
+ */
+
+
+public class TopFlopArticle implements Analysis<Map<String, Integer>> {
+
+    private Instances instances;
+    private Map<String, Integer> results;
+
+    public TopFlopArticle(File file){
+        results = new HashMap<>();
+        instances = load(file);
+    }
+
+    /**
+     * get sum for every article and sort them asending
+     * @return Map of Name of Products and Sum of Values
+     */
+    public Map<String, Integer> getResult() {
+        String name;
+        Double sum = 0.0;
+        for(int i=11; i<=25; i++) {
+            for (Instance instance : instances) {
+                sum += instance.value(i);
+            }
+            name = instances.attribute(i).name();
+            results.put(name, sum.intValue());
+            sum = 0.0;
+        }
+        //Sort Map in ascending order
+        Stream<Map.Entry<String, Integer>> sorted = results.entrySet().stream().sorted(Map.Entry.comparingByValue());
+        results = sorted.collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue(), (e1, e2) -> e2, LinkedHashMap::new));
+        return results;
+    }
+
+}
+
+

From 3ccad0d8370416fa9d2881dc38a1987cc67651c8 Mon Sep 17 00:00:00 2001
From: Karsten <karstened@gmail.com>
Date: Sun, 5 May 2019 18:56:10 +0200
Subject: [PATCH 2/2] Test Cases

---
 .../baudas/analysis/TopFlopArticlesTest.java  | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 src/test/java/de/hsel/spm/baudas/analysis/TopFlopArticlesTest.java

diff --git a/src/test/java/de/hsel/spm/baudas/analysis/TopFlopArticlesTest.java b/src/test/java/de/hsel/spm/baudas/analysis/TopFlopArticlesTest.java
new file mode 100644
index 0000000..b81f4a2
--- /dev/null
+++ b/src/test/java/de/hsel/spm/baudas/analysis/TopFlopArticlesTest.java
@@ -0,0 +1,57 @@
+package de.hsel.spm.baudas.analysis;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.net.URL;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TopFlopArticlesTest {
+
+    @Test
+    void test100() {
+        URL url = getClass().getClassLoader().getResource("kd100.csv");
+        assert url != null;
+        TopFlopArticle tfArticle = new TopFlopArticle(new File(url.getFile()));
+        Map<String, Integer> results = tfArticle.getResult();
+
+        assertEquals(529, results.get("Farben"));
+        assertEquals(2403, results.get("Elektrowerkzeuge"));
+        assertEquals(8055, results.get("Baustoffe"));
+        assertEquals(5414, results.get("Fliesen"));
+        assertEquals(1466, results.get("Holz"));
+
+    }
+
+    @Test
+    void test1000() {
+        URL url = getClass().getClassLoader().getResource("kd1000.csv");
+        assert url != null;
+        TopFlopArticle tfArticle = new TopFlopArticle(new File(url.getFile()));
+        Map<String, Integer> results = tfArticle.getResult();
+
+        assertEquals(5643, results.get("Eisenwaren"));
+        assertEquals(9339, results.get("Bodenbelag"));
+        assertEquals(12824, results.get("Gartengeraete"));
+        assertEquals(29055, results.get("Sanitaermaterial"));
+        assertEquals(50067, results.get("Armaturen"));
+
+    }
+
+    @Test
+    void test10000() {
+        URL url = getClass().getClassLoader().getResource("kd10000.csv");
+        assert url != null;
+        TopFlopArticle tfArticle = new TopFlopArticle(new File(url.getFile()));
+        Map<String, Integer> results = tfArticle.getResult();
+
+        assertEquals(101665, results.get("Handwerkzeuge"));
+        assertEquals(151920, results.get("Leuchten"));
+        assertEquals(231881, results.get("Schliesstechnik"));
+        assertEquals(294053, results.get("Elektromaterial"));
+        assertEquals(543613, results.get("Renovierung"));
+
+    }
+}