added csv file generation (for easy plotting of runtimes)

src/test/java/it/unibz/inf/isochrone/network/AlgorithmRuntimeTest.java

 package it.unibz.inf.isochrone.network;
 
+import com.google.common.base.Charsets;
+
 import it.unibz.inf.isochrone.algorithm.Isochrone;
 import it.unibz.inf.isochrone.algorithm.MDijkstra;
 import it.unibz.inf.isochrone.algorithm.MineX;
@@ -38,6 +40,8 @@ import org.testng.annotations.Test;
 public final class AlgorithmRuntimeTest {
 	private static final Logger LOGGER = LoggerFactory.getLogger(AlgorithmRuntimeTest.class);
 	private static final int REPEAT_COUNT = 5;
+	private static final String RESULTFILE_ENCODING = Charsets.UTF_8.toString();
+	private static final String RESULTFILE_CSV_RUNTIME = "build/reports/tests/algorithm-runtimes.csv";
 	private static final String RESULTFILE_XML_RUNTIME = "build/reports/tests/algorithm-runtimes.xml";
 	private static final Direction DIRECTION = Direction.INCOMING;
 	private static final Mode MODE = Mode.MULTIMODAL;
@@ -106,9 +110,9 @@ public final class AlgorithmRuntimeTest {
 	// Public static methods
 
 	@AfterClass
-	public static void writeRuntimeXML() {
-		final Set<Entry<String, Map<String, Long>>> resultSet = runtimes.entrySet();
-		writeMapToXML(new File(RESULTFILE_XML_RUNTIME), resultSet, REPEAT_COUNT);
+	public static void writeRuntimes() {
+		writeRuntimeXML();
+		writeRuntimeCSV();
 	}
 
 	@BeforeClass
@@ -211,7 +215,7 @@ public final class AlgorithmRuntimeTest {
 
 	private static void addRuntimeEntry(final String time, final String algorithm, final long runtime) {
 		if (!runtimes.containsKey(time)) {
-			runtimes.put(time, new HashMap<String, Long>());
+			runtimes.put(time, new LinkedHashMap<String, Long>());
 		}
 
 		final Map<String, Long> algorithmMap = runtimes.get(time);
@@ -223,11 +227,50 @@ public final class AlgorithmRuntimeTest {
 		}
 	}
 
+	private static void writeMapToCSV(final File file, final Set<Entry<String, Map<String, Long>>> resultSet, final int repeatCount) {
+		BufferedWriter fw = null;
+		try {
+			fw = new BufferedWriter(new PrintWriter(file, RESULTFILE_ENCODING));
+			boolean isFirstLine = true;
+			for (Entry<String, Map<String, Long>> runtimeEntry : resultSet) {
+				final String time = runtimeEntry.getKey();
+				final Map<String, Long> results = runtimeEntry.getValue();
+				if (isFirstLine) {
+					fw.write("Runtime;");
+					final Set<String> algorithms = results.keySet();
+					for (String algorithmName : algorithms) {
+						fw.write(algorithmName + ";");
+					}
+					fw.newLine();
+					isFirstLine = false;
+				}
+
+				fw.write(time + ";");
+				final Set<Entry<String, Long>> timeSet = results.entrySet();
+				for (Entry<String, Long> entry : timeSet) {
+					fw.write((entry.getValue().longValue() / repeatCount) + ";");
+				}
+				fw.newLine();
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		} finally {
+			if (fw != null) {
+				try {
+					fw.flush();
+					fw.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+		}
+	}
+
 	private static void writeMapToXML(final File file, final Set<Entry<String, Map<String, Long>>> resultSet, final int repeatCount) {
 		BufferedWriter fw = null;
 		try {
-			fw = new BufferedWriter(new PrintWriter(file, "UTF-8"));
-			fw.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
+			fw = new BufferedWriter(new PrintWriter(file, RESULTFILE_ENCODING));
+			fw.write("<?xml version=\"1.0\" encoding=\"" + RESULTFILE_ENCODING + "\"?>");
 			fw.newLine();
 			fw.write("<results numberOfRuns=\"" + repeatCount + "\">");
 			fw.newLine();
@@ -262,4 +305,14 @@ public final class AlgorithmRuntimeTest {
 		}
 	}
 
+	private static void writeRuntimeCSV() {
+		final Set<Entry<String, Map<String, Long>>> resultSet = runtimes.entrySet();
+		writeMapToCSV(new File(RESULTFILE_CSV_RUNTIME), resultSet, REPEAT_COUNT);
+	}
+
+	private static void writeRuntimeXML() {
+		final Set<Entry<String, Map<String, Long>>> resultSet = runtimes.entrySet();
+		writeMapToXML(new File(RESULTFILE_XML_RUNTIME), resultSet, REPEAT_COUNT);
+	}
+
 }