solved s3 ex2

03/src/main/java/ch/zhaw/ads/Competitor.java

@@ -1,3 +1,5 @@
+package ch.zhaw.ads;
+
 import java.util.*;
 import java.text.*;
 

03/src/main/java/ch/zhaw/ads/RankingServer.java

@@ -0,0 +1,61 @@
+package ch.zhaw.ads;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.text.ParseException;
+import java.lang.ArrayIndexOutOfBoundsException;
+
+public class RankingServer implements CommandExecutor {
+    List<Competitor> competitors;
+
+    @Override
+    public String execute(String input) {
+        this.competitors = parseCSV(input);
+
+        StringBuffer result = new StringBuffer(100);
+        result.append("Competitors:\n");
+        for (Competitor competitor : competitors) {
+            result.append(competitor.toString() + "\n");
+        }
+        return result.toString();
+    }
+
+    /**
+     * NOTE ABOUT CSV FORMAT (from `man virt-diff`)
+     *        Comma-separated values (CSV) is a deceptive format.  It seems like it should be easy to parse,
+     *        but it is definitely not easy to parse.
+     *
+     *        Myth: Just split fields at commas.  Reality: This does not work reliably.  This example has two
+     *        columns:
+     *
+     *         "foo,bar",baz
+     *
+     *        Myth: Read the file one line at a time.  Reality: This does not work reliably.  This example has
+     *        one row:
+     *
+     *         "foo
+     *         bar",baz
+     */
+    private List<Competitor> parseCSV(String csv) {
+        int startNr, jg;
+        String name, country, time;
+
+        List<Competitor> competitors = new ArrayList<Competitor>();
+        for (String record : csv.split("\\r?\\n")) {
+            String[] values = record.split(";");
+
+            try {
+                startNr = Integer.valueOf(values[0]);
+                name = values[1];
+                jg = Integer.valueOf(values[2]);
+                country = values[3];
+                time = values[4];
+                competitors.add(new Competitor(startNr, name, jg, country, time));
+            } catch (NumberFormatException | ParseException | ArrayIndexOutOfBoundsException e) {
+                System.err.println("Failed to add competitor.");
+                continue;
+            }
+        }
+        return competitors;
+    }
+}

03/src/test/java/ch/zhaw/ads/RankingServerTest.java

@@ -0,0 +1,38 @@
+package ch.zhaw.ads;
+
+import org.junit.Test;
+import org.junit.Before;
+import static org.junit.Assert.*;
+import java.util.*;
+import java.io.*;
+
+public class RankingServerTest {
+
+    RankingServer rankingServer;
+    String csv;
+
+    @Before
+    public void setUp() throws Exception {
+        rankingServer = new RankingServer();
+        csv = openFile("./build/resources/main/RangZuerich.csv");
+    }
+
+    @Test
+    public void test1() {
+        System.out.println(rankingServer.execute(csv));
+    }
+
+    // helper functions
+    private String openFile(String name) throws Exception {
+		BufferedReader br = new BufferedReader(
+				new InputStreamReader(new FileInputStream(name), "ISO-8859-1"));
+		StringBuffer b = new StringBuffer();
+		String line;
+		while ((line = br.readLine()) != null) {
+			b.append(line);
+			b.append('\n');
+		}
+		return b.toString();
+    }
+}
+