add --perf option to measure performance

Author: arnaudroques

src/main/java/com/pdiff/Introspection.java

@@ -19,17 +19,27 @@ public static String versionString() {
 		}
 	}
 
-	public static OutputRun outputImage(final Path outputPathPng, final String text) throws Exception {
+	public static OutputRun outputImage(final Path outputPathPng, final String text, boolean onlyPerf)
+			throws Exception {
 
 		final Class<?> readerClass = Class.forName("net.sourceforge.plantuml.SourceStringReader");
+		final Class<?> fileFormatClass = Class.forName("net.sourceforge.plantuml.FileFormat");
+		final Class<?> fileFormatOptionClass = Class.forName("net.sourceforge.plantuml.FileFormatOption");
+
+		final Enum fileFormatPng = onlyPerf ? Enum.valueOf((Class<Enum>) fileFormatClass, "PNG_EMPTY")
+				: Enum.valueOf((Class<Enum>) fileFormatClass, "PNG");
+		final Constructor<?> fileFormatOptionConstructor = fileFormatOptionClass.getConstructor(fileFormatClass);
+		final Object fileFormatOptionInstance = fileFormatOptionConstructor.newInstance(fileFormatPng);
 
 		final Constructor<?> readerConstructor = readerClass.getConstructor(String.class);
 		final Object readerInstance = readerConstructor.newInstance(text);
 
-		final Method outputImageMethod = readerClass.getMethod("outputImage", OutputStream.class);
+		final Method outputImageMethod = readerClass.getMethod("outputImage", OutputStream.class, int.class,
+				fileFormatOptionClass);
 
 		try (OutputStream png = Files.newOutputStream(outputPathPng)) {
-			final Object result = outputImageMethod.invoke(readerInstance, png);
+			final Object result = outputImageMethod.invoke(readerInstance, png, 0, fileFormatOptionInstance);
+
 			final Method getDescriptionMethod = result.getClass().getMethod("getDescription");
 			final String description = (String) getDescriptionMethod.invoke(result);
 

src/main/java/com/pdiff/RunCommand.java

@@ -35,6 +35,10 @@ public class RunCommand {
 	@Parameter(names = { "-s", "--slot" }, description = "Specifies the number of parallel slots", required = false)
 	private int slot = Runtime.getRuntime().availableProcessors();
 
+	@Parameter(names = { "-p", "--perf" }, description = "Do not generate output files", required = false)
+	private boolean onlyPerf = false;
+
+
 	private AtomicInteger done = new AtomicInteger();
 
 	private int minimalPrefix;
@@ -49,7 +53,7 @@ private Predicate<? super DbFileBeforeRun> getFilter() {
 	}
 
 	public void doit() throws IOException, InterruptedException {
-
+		
 		final DbCollection dbCollection = new DbCollection();
 		this.minimalPrefix = dbCollection.getMinimalPrefix();
 
@@ -110,7 +114,7 @@ private void processFile(DbFileBeforeRun dbFile) throws Exception {
 		magicOutput.updateLivingPart(workerId, workerId + " " + dbFile.getFileName(minimalPrefix));
 		magicOutput.updateLivingPart(slot, remainingTime.updateCountAndGetStatus(done.incrementAndGet()));
 
-		dbFile.convertMe(this.minimalPrefix);
+		dbFile.convertMe(this.minimalPrefix, onlyPerf);
 		magicOutput.updateLivingPart(workerId, "");
 
 	}

src/main/java/com/pdiff/core/DbFileBeforeRun.java

@@ -43,7 +43,7 @@ private DbFileAfterRun getDbFileAfterRun() {
 		return res.get();
 	}
 
-	public void convertMe(int minimalPrefix) throws Exception {
+	public void convertMe(int minimalPrefix, boolean onlyPerf) throws Exception {
 		List<String> all = Files.readAllLines(getPumlPath());
 		all = all.subList(DbCollection.getStartingLine(all), all.size());
 
@@ -53,7 +53,7 @@ public void convertMe(int minimalPrefix) throws Exception {
 		Files.createDirectories(outputPathPng.getParent());
 
 		final long start = System.currentTimeMillis();
-		final OutputRun outputRun = Introspection.outputImage(outputPathPng, text);
+		final OutputRun outputRun = Introspection.outputImage(outputPathPng, text, onlyPerf);
 
 		final long duration = System.currentTimeMillis() - start;
 

src/main/java/com/pdiff/core/ImageSignature.java

@@ -37,6 +37,15 @@ private ImageSignature(BufferedImage im, boolean ignoreFirstPoint) {
 		this.height = im.getHeight();
 		this.crc = crc.getValue();
 	}
+	
+	private void updateCRC(CRC32 crc, int c) {
+		final int r = (c & 0xFF0000) >> 16;
+		final int g = (c & 0x00FF00) >> 8;
+		final int b = (c & 0x0000FF);
+		crc.update(r);
+		crc.update(g);
+		crc.update(b);
+	}
 
 	public static ImageSignature fromImage(BufferedImage im) {
 		return new ImageSignature(im, false);
@@ -81,14 +90,7 @@ public boolean equals(Object arg) {
 //		return fromImage(im, ignoreFirstPoint);
 //	}
 
-	private void updateCRC(CRC32 crc, int c) {
-		final int r = (c & 0xFF0000) >> 16;
-		final int g = (c & 0x00FF00) >> 8;
-		final int b = (c & 0x0000FF);
-		crc.update(r);
-		crc.update(g);
-		crc.update(b);
-	}
+
 
 	public final long getCrc() {
 		return crc;