Refactor some code to use AutoCloseable / try-with-resources

src/net/sourceforge/plantuml/AFileZipEntry.java

@@ -60,8 +60,7 @@ public class AFileZipEntry implements AFile {
 	public InputStream openFile() {
 		final InputStream tmp = zipFile.openFile();
 		if (tmp != null)
-			try {
-				final ZipInputStream zis = new ZipInputStream(tmp);
+			try (final ZipInputStream zis = new ZipInputStream(tmp)) {
 				ZipEntry ze = zis.getNextEntry();
 
 				while (ze != null) {
@@ -73,7 +72,6 @@ public class AFileZipEntry implements AFile {
 					ze = zis.getNextEntry();
 				}
 				zis.closeEntry();
-				zis.close();
 			} catch (IOException e) {
 				e.printStackTrace();
 			}

src/net/sourceforge/plantuml/BlockUmlBuilder.java

@@ -64,19 +64,15 @@ public final class BlockUmlBuilder implements DefinitionsContainer {
 
 	public BlockUmlBuilder(List<String> config, String charset, Defines defines, Reader readerInit, SFile newCurrentDir,
 			String desc) throws IOException {
-		ReadLineNumbered includer = null;
+		
 		this.defines = defines;
 		this.charset = charset;
-		try {
-			this.reader = new UncommentReadLine(ReadLineReader.create(readerInit, desc));
-			this.importedFiles = ImportedFiles.createImportedFiles(new AParentFolderRegular(newCurrentDir));
-			includer = new Preprocessor(config, reader);
+		this.reader = new UncommentReadLine(ReadLineReader.create(readerInit, desc));
+		this.importedFiles = ImportedFiles.createImportedFiles(new AParentFolderRegular(newCurrentDir));
+		
+		try (ReadLineNumbered includer = new Preprocessor(config, reader)) {
 			init(includer);
 		} finally {
-			if (includer != null) {
-				includer.close();
-				// usedFiles = includer.getFilesUsedTOBEREMOVED();
-			}
 			readerInit.close();
 		}
 	}

src/net/sourceforge/plantuml/FileUtils.java

@@ -139,9 +139,9 @@ public class FileUtils {
 	}
 
 	static public void copyToFile(byte[] src, SFile dest) throws IOException {
-		final OutputStream fos = dest.createBufferedOutputStream();
-		fos.write(src);
-		fos.close();
+		try (OutputStream fos = dest.createBufferedOutputStream()) {
+			fos.write(src);
+		}
 	}
 
 	static public String readSvg(SFile svgFile) throws IOException {

src/net/sourceforge/plantuml/OptionFlags.java

@@ -210,9 +210,7 @@ public class OptionFlags {
 				return;
 			}
 			// final PSystemError systemError = (PSystemError) system;
-			PrintStream ps = null;
-			try {
-				ps = SecurityUtils.createPrintStream(logData.createFileOutputStream(true));
+			try (PrintStream ps = SecurityUtils.createPrintStream(logData.createFileOutputStream(true))) {
 				ps.println("Start of " + file.getName());
 				ps.println(warnOrError);
 				ps.println("End of " + file.getName());
@@ -220,10 +218,6 @@ public class OptionFlags {
 			} catch (FileNotFoundException e) {
 				Log.error("Cannot open " + logData);
 				e.printStackTrace();
-			} finally {
-				if (ps != null) {
-					ps.close();
-				}
 			}
 		}
 	}
@@ -231,17 +225,11 @@ public class OptionFlags {
 	public final void setLogData(SFile logData) {
 		this.logData = logData;
 		logData.delete();
-		PrintStream ps = null;
-		try {
-			ps = SecurityUtils.createPrintStream(logData.createFileOutputStream());
+		try (PrintStream ps = SecurityUtils.createPrintStream(logData.createFileOutputStream())) {
 			ps.println();
 		} catch (FileNotFoundException e) {
 			Log.error("Cannot open " + logData);
 			e.printStackTrace();
-		} finally {
-			if (ps != null) {
-				ps.close();
-			}
 		}
 	}
 

src/net/sourceforge/plantuml/Run.java

@@ -297,17 +297,10 @@ public class Run {
 			return;
 		}
 
-		InputStream stream = null;
 		final BufferedImage im;
-		try {
-			stream = source.openStream();
+		try (InputStream stream = source.openStream()) {
 			im = ImageIO.read(stream);
-		} finally {
-			if (stream != null) {
-				stream.close();
-			}
 		}
-
 		final String name = getSpriteName(fileName);
 		final String s = compressed ? SpriteUtils.encodeCompressed(im, name, level)
 				: SpriteUtils.encode(im, name, level);
@@ -545,24 +538,24 @@ public class Run {
 					.withPreprocFormat();
 			final SFile file = suggested.getFile(0);
 			Log.info("Export preprocessing source to " + file.getPrintablePath());
-			final PrintWriter pw = charset == null ? file.createPrintWriter() : file.createPrintWriter(charset);
-			int level = 0;
-			for (CharSequence cs : blockUml.getDefinition(true)) {
-				String s = cs.toString();
-				if (cypher != null) {
-					if (s.contains("skinparam") && s.contains("{")) {
-						level++;
-					}
-					if (level == 0 && s.contains("skinparam") == false) {
-						s = cypher.cypher(s);
-					}
-					if (level > 0 && s.contains("}")) {
-						level--;
+			try (final PrintWriter pw = charset == null ? file.createPrintWriter() : file.createPrintWriter(charset)) {
+				int level = 0;
+				for (CharSequence cs : blockUml.getDefinition(true)) {
+					String s = cs.toString();
+					if (cypher != null) {
+						if (s.contains("skinparam") && s.contains("{")) {
+							level++;
+						}
+						if (level == 0 && s.contains("skinparam") == false) {
+							s = cypher.cypher(s);
+						}
+						if (level > 0 && s.contains("}")) {
+							level--;
+						}
 					}
+					pw.println(s);
 				}
-				pw.println(s);
 			}
-			pw.close();
 		}
 	}
 

src/net/sourceforge/plantuml/SignatureUtils.java

@@ -143,11 +143,8 @@ public class SignatureUtils {
 	}
 
 	public static String getSignatureSha512(SFile f) throws IOException {
-		final InputStream is = f.openFile();
-		try {
+		try (InputStream is = f.openFile()) {
 			return getSignatureSha512(is);
-		} finally {
-			is.close();
 		}
 	}
 
@@ -183,9 +180,8 @@ public class SignatureUtils {
 	}
 
 	public static synchronized String getSignature(SFile f) throws IOException {
-		try {
+		try (final InputStream is = f.openFile()) {
 			final MessageDigest msgDigest = MessageDigest.getInstance("MD5");
-			final InputStream is = f.openFile();
 			if (is == null) {
 				throw new FileNotFoundException();
 			}
@@ -193,7 +189,6 @@ public class SignatureUtils {
 			while ((read = is.read()) != -1) {
 				msgDigest.update((byte) read);
 			}
-			is.close();
 			final byte[] digest = msgDigest.digest();
 			return toString(digest);
 		} catch (NoSuchAlgorithmException e) {

src/net/sourceforge/plantuml/SourceFileReaderAbstract.java

@@ -108,17 +108,10 @@ public abstract class SourceFileReaderAbstract implements ISourceFileReader {
 
 	private List<GeneratedImage> getCrashedImage(BlockUml blockUml, Throwable t, SFile outputFile) throws IOException {
 		final GeneratedImage image = new GeneratedImageImpl(outputFile, "Crash Error", blockUml, FileImageData.CRASH);
-		OutputStream os = null;
-		try {
-			os = outputFile.createBufferedOutputStream();
+		try (OutputStream os = outputFile.createBufferedOutputStream()) {
 			UmlDiagram.exportDiagramError(os, t, fileFormatOption, 42, null, blockUml.getFlashData(),
 					UmlDiagram.getFailureText2(t, blockUml.getFlashData()));
-		} finally {
-			if (os != null) {
-				os.close();
-			}
 		}
-
 		return Collections.singletonList(image);
 	}
 
@@ -128,9 +121,9 @@ public abstract class SourceFileReaderAbstract implements ISourceFileReader {
 			if (warnOrError != null) {
 				final String name = f.getName().substring(0, f.getName().length() - 4) + ".err";
 				final SFile errorFile = f.getParentFile().file(name);
-				final PrintStream ps = SecurityUtils.createPrintStream(errorFile.createFileOutputStream());
-				ps.print(warnOrError);
-				ps.close();
+				try (PrintStream ps = SecurityUtils.createPrintStream(errorFile.createFileOutputStream())) {
+					ps.print(warnOrError);
+				}
 			}
 		}
 	}

src/net/sourceforge/plantuml/SourceStringReader.java

@@ -110,14 +110,9 @@ public class SourceStringReader {
 	}
 
 	public DiagramDescription outputImage(SFile f) throws IOException {
-		final OutputStream os = f.createBufferedOutputStream();
-		DiagramDescription result = null;
-		try {
-			result = outputImage(os, 0);
-		} finally {
-			os.close();
+		try (OutputStream os = f.createBufferedOutputStream()) {
+			return outputImage(os, 0);
 		}
-		return result;
 	}
 
 	@Deprecated

src/net/sourceforge/plantuml/UmlDiagram.java

@@ -282,9 +282,10 @@ public abstract class UmlDiagram extends TitledDiagram implements Diagram, Annot
 	private ImageData exportDiagramInternalPdf(OutputStream os, int index) throws IOException {
 		final File svg = FileUtils.createTempFileLegacy("pdf", ".svf");
 		final File pdfFile = FileUtils.createTempFileLegacy("pdf", ".pdf");
-		final OutputStream fos = new BufferedOutputStream(new FileOutputStream(svg));
-		final ImageData result = exportDiagram(fos, index, new FileFormatOption(FileFormat.SVG));
-		fos.close();
+		final ImageData result;
+		try (OutputStream fos = new BufferedOutputStream(new FileOutputStream(svg))) {
+			result = exportDiagram(fos, index, new FileFormatOption(FileFormat.SVG));
+		}
 		PdfConverter.convert(svg, pdfFile);
 		FileUtils.copyToStream(pdfFile, os);
 		return result;
@@ -297,18 +298,11 @@ public abstract class UmlDiagram extends TitledDiagram implements Diagram, Annot
 			throws FileNotFoundException {
 		final String name = changeName(suggestedFile.getFile(index).getAbsolutePath());
 		final SFile cmapFile = new SFile(name);
-		PrintWriter pw = null;
-		try {
+		try (PrintWriter pw = cmapFile.createPrintWriter()) {
 			if (PSystemUtils.canFileBeWritten(cmapFile) == false) {
 				return;
 			}
-			pw = cmapFile.createPrintWriter();
 			pw.print(cmapdata.getCMapData(cmapFile.getName().substring(0, cmapFile.getName().length() - 6)));
-			pw.close();
-		} finally {
-			if (pw != null) {
-				pw.close();
-			}
 		}
 	}
 

src/net/sourceforge/plantuml/ant/CheckZipTask.java

@@ -112,24 +112,24 @@ public class CheckZipTask extends Task {
 	private void loadZipFile(SFile file) throws IOException {
 
 		this.entries.clear();
-		final PrintWriter pw = SecurityUtils.createPrintWriter("tmp.txt");
 		final InputStream tmp = file.openFile();
 		if (tmp == null) {
 			throw new FileNotFoundException();
 		}
-		final ZipInputStream zis = new ZipInputStream(tmp);
-		ZipEntry ze = zis.getNextEntry();
-
-		while (ze != null) {
-			final String fileName = ze.getName();
-			this.entries.add(fileName);
-			if (fileName.endsWith("/") == false) {
-				pw.println("<file name=\"" + fileName + "\" />");
+		try (
+			final PrintWriter pw = SecurityUtils.createPrintWriter("tmp.txt");
+			final ZipInputStream zis = new ZipInputStream(tmp);
+		) {
+			ZipEntry ze = zis.getNextEntry();
+			while (ze != null) {
+				final String fileName = ze.getName();
+				this.entries.add(fileName);
+				if (fileName.endsWith("/") == false) {
+					pw.println("<file name=\"" + fileName + "\" />");
+				}
+				ze = zis.getNextEntry();
 			}
-			ze = zis.getNextEntry();
 		}
-		pw.close();
-		zis.close();
 	}
 
 	private synchronized void myLog(String s) {

src/net/sourceforge/plantuml/code/CompressionBrotli.java

@@ -49,12 +49,11 @@ public class CompressionBrotli implements Compression {
 	}
 
 	public ByteArray decompress(byte[] in) throws NoPlantumlCompressionException {
-		try {
-			final BrotliInputStream brotli = new BrotliInputStream(new ByteArrayInputStream(in));
-			final ByteArrayOutputStream result = new ByteArrayOutputStream();
+		try (
+				final BrotliInputStream brotli = new BrotliInputStream(new ByteArrayInputStream(in));
+				final ByteArrayOutputStream result = new ByteArrayOutputStream();
+		) {
 			FileUtils.copyToStream(brotli, result);
-			brotli.close();
-			result.close();
 			return ByteArray.from(result.toByteArray());
 		} catch (IOException e) {
 			e.printStackTrace();

src/net/sourceforge/plantuml/cucadiagram/GroupPrinter.java

@@ -85,12 +85,10 @@ public class GroupPrinter {
 	}
 
 	public static void print(SFile f, IGroup rootGroup) {
-		try {
-			final PrintWriter pw = f.createPrintWriter();
+		try (PrintWriter pw = f.createPrintWriter()) {
 			pw.println("<html>");
 			new GroupPrinter(pw).printGroup(rootGroup);
 			pw.println("</html>");
-			pw.close();
 		} catch (IOException e) {
 			e.printStackTrace();
 		}

src/net/sourceforge/plantuml/openiconic/OpenIcon.java

@@ -85,30 +85,28 @@ public class OpenIcon {
 
 	private OpenIcon(InputStream is, String id) throws IOException {
 		this.id = id;
-		BufferedReader br = new BufferedReader(new InputStreamReader(is));
-		String s = null;
-		while ((s = br.readLine()) != null) {
-			rawData.add(s);
-			if (s.contains("<path")) {
-				final int x1 = s.indexOf('"');
-				final int x2 = s.indexOf('"', x1 + 1);
-				svgPath = new SvgPath(s.substring(x1 + 1, x2));
+		try (BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+			String s = null;
+			while ((s = br.readLine()) != null) {
+				rawData.add(s);
+				if (s.contains("<path")) {
+					final int x1 = s.indexOf('"');
+					final int x2 = s.indexOf('"', x1 + 1);
+					svgPath = new SvgPath(s.substring(x1 + 1, x2));
+				}
 			}
 		}
-		br.close();
-		is.close();
 		if (rawData.size() != 3 && rawData.size() != 4) {
 			throw new IllegalStateException();
 		}
 	}
 
 	void saveCopy(SFile fnew) throws IOException {
-		final PrintWriter pw = fnew.createPrintWriter();
-		pw.println(rawData.get(0));
-		pw.println(svgPath.toSvg());
-		pw.println(rawData.get(rawData.size() - 1));
-		pw.close();
-
+		try(PrintWriter pw = fnew.createPrintWriter()) {
+			pw.println(rawData.get(0));
+			pw.println(svgPath.toSvg());
+			pw.println(rawData.get(rawData.size() - 1));
+		}
 	}
 
 	private Dimension2D getDimension(double factor) {

src/net/sourceforge/plantuml/openiconic/PSystemListOpenIconic.java

@@ -66,14 +66,14 @@ public class PSystemListOpenIconic extends PlainDiagram {
 		lines.add("<i>Credit to");
 		lines.add("https://useiconic.com/open");
 		lines.add(" ");
-		final BufferedReader br = new BufferedReader(new InputStreamReader(getRessourceAllTxt()));
-		String s = null;
-		while ((s = br.readLine()) != null) {
-			// lines.add("<&yen> " + s);
-			// System.err.println("s=" + s);
-			lines.add("<&" + s + "> " + s);
+		try (BufferedReader br = new BufferedReader(new InputStreamReader(getRessourceAllTxt()))) {
+			String s = null;
+			while ((s = br.readLine()) != null) {
+				// lines.add("<&yen> " + s);
+				// System.err.println("s=" + s);
+				lines.add("<&" + s + "> " + s);
+			}
 		}
-		br.close();
 		final List<TextBlock> cols = PSystemDonors.getCols(lines, 7, 0);
 		return new TextBlockHorizontal(cols, VerticalAlignment.TOP);
 	}

src/net/sourceforge/plantuml/picoweb/PicoWebServerTest.java

@@ -248,16 +248,10 @@ public class PicoWebServerTest {
 	}
 
 	private static String httpRaw(String request) throws Exception {
-		Socket socket = null;
-		try {
-			socket = socketConnection();
+		try (Socket socket = socketConnection()) {
 			socket.getOutputStream().write(request.getBytes(UTF_8));
 			socket.shutdownOutput();
 			return readStreamAsString(socket.getInputStream()).replaceAll("\r\n", "\n");
-		} finally {
-			if (socket != null) {
-				socket.close();
-			}
 		}
 	}
 

src/net/sourceforge/plantuml/png/PngIO.java

@@ -56,14 +56,8 @@ public class PngIO {
 	}
 
 	public static void write(RenderedImage image, SFile file, String metadata, int dpi) throws IOException {
-		OutputStream os = null;
-		try {
-			os = file.createBufferedOutputStream();
+		try (OutputStream os = file.createBufferedOutputStream()) {
 			write(image, os, metadata, dpi);
-		} finally {
-			if (os != null) {
-				os.close();
-			}
 		}
 		Log.debug("File is " + file);
 		Log.debug("File size " + file.length());

src/net/sourceforge/plantuml/posimo/GraphvizSolverB.java

@@ -222,11 +222,11 @@ public class GraphvizSolverB {
 
 	private void exportPng(final String dotString, SFile f) throws IOException {
 		final Graphviz graphviz = GraphvizUtils.create(null, dotString, "png");
-		final OutputStream os = f.createBufferedOutputStream();
-		final ProcessState state = graphviz.createFile3(os);
-		os.close();
-		if (state.differs(ProcessState.TERMINATED_OK())) {
-			throw new IllegalStateException("Timeout3 " + state);
+		try (OutputStream os = f.createBufferedOutputStream()) {
+			final ProcessState state = graphviz.createFile3(os);
+			if (state.differs(ProcessState.TERMINATED_OK())) {
+				throw new IllegalStateException("Timeout3 " + state);
+			}
 		}
 	}
 

src/net/sourceforge/plantuml/stats/StatsUtils.java

@@ -166,27 +166,15 @@ public class StatsUtils {
 	}
 
 	static void htmlOutput(Stats stats) throws FileNotFoundException {
-		PrintWriter pw = null;
-		try {
-			pw = SecurityUtils.createPrintWriter("plantuml-stats.html");
+		try (PrintWriter pw = SecurityUtils.createPrintWriter("plantuml-stats.html")) {
 			pw.print(new HtmlConverter(stats).toHtml());
-		} finally {
-			if (pw != null) {
-				pw.close();
-			}
 		}
 	}
 
 	static void xmlOutput(Stats stats)
-			throws FileNotFoundException, TransformerException, ParserConfigurationException, IOException {
-		OutputStream os = null;
-		try {
-			os = SecurityUtils.createFileOutputStream("plantuml-stats.xml");
+			throws TransformerException, ParserConfigurationException, IOException {
+		try (OutputStream os = SecurityUtils.createFileOutputStream("plantuml-stats.xml")) {
 			new XmlConverter(stats).createXml(os);
-		} finally {
-			if (os != null) {
-				os.close();
-			}
 		}
 	}
 

src/net/sourceforge/plantuml/svek/SvekUtils.java

@@ -47,15 +47,9 @@ import net.sourceforge.plantuml.security.SFile;
 public class SvekUtils {
 
 	static public void traceString(final SFile f, String text) throws IOException {
-		PrintWriter pw = null;
-		try {
-			Log.info("Creating intermediate file " + f.getPrintablePath());
-			pw = f.createPrintWriter();
+		Log.info("Creating intermediate file " + f.getPrintablePath());
+		try (PrintWriter pw = f.createPrintWriter()) {
 			pw.print(text);
-		} finally {
-			if (pw != null) {
-				pw.close();
-			}
 		}
 	}
 

src/net/sourceforge/plantuml/version/PSystemVersion.java

@@ -47,7 +47,6 @@ import net.sourceforge.plantuml.OptionFlags;
 import net.sourceforge.plantuml.OptionPrint;
 import net.sourceforge.plantuml.PlainStringsDiagram;
 import net.sourceforge.plantuml.Run;
-import net.sourceforge.plantuml.StringLocated;
 import net.sourceforge.plantuml.core.DiagramDescription;
 import net.sourceforge.plantuml.core.UmlSource;
 import net.sourceforge.plantuml.cucadiagram.dot.GraphvizUtils;
@@ -127,11 +126,8 @@ public class PSystemVersion extends PlainStringsDiagram {
 	}
 
 	private static BufferedImage getImageWebp(final String name) {
-		try {
-			final InputStream is = PSystemVersion.class.getResourceAsStream(name);
-			final BufferedImage image = PSystemDedication.getBufferedImage(is);
-			is.close();
-			return image;
+		try (InputStream is = PSystemVersion.class.getResourceAsStream(name)) {
+			return PSystemDedication.getBufferedImage(is);
 		} catch (IOException e) {
 			e.printStackTrace();
 		}

src/net/sourceforge/plantuml/windowsdot/WindowsDotArchive.java

@@ -85,28 +85,25 @@ public final class WindowsDotArchive {
 
 	private static void extract(File dir) throws IOException {
 		final InputStream raw = WindowsDotArchive.class.getResourceAsStream("graphviz.dat");
-		final BrotliInputStream is = new BrotliInputStream(raw);
-
-		while (true) {
-			final String name = readString(is);
-			if (name.length() == 0)
-				break;
-			final int size = readNumber(is);
-			final OutputStream fos = new BufferedOutputStream(new FileOutputStream(new File(dir, name)));
-			for (int i = 0; i < size; i++) {
-				fos.write(is.read());
+		try (final BrotliInputStream is = new BrotliInputStream(raw)) {
+			while (true) {
+				final String name = readString(is);
+				if (name.length() == 0)
+					break;
+				final int size = readNumber(is);
+				try (final OutputStream fos = new BufferedOutputStream(new FileOutputStream(new File(dir, name)))) {
+					for (int i = 0; i < size; i++) {
+						fos.write(is.read());
+					}
+				}
 			}
-			fos.close();
 		}
-		is.close();
 	}
 
 	public synchronized boolean isThereArchive() {
 		if (isThereArchive == null)
-			try {
-				final InputStream raw = WindowsDotArchive.class.getResourceAsStream("graphviz.dat");
+			try (InputStream raw = WindowsDotArchive.class.getResourceAsStream("graphviz.dat")) {
 				isThereArchive = raw != null;
-				raw.close();
 			} catch (Exception e) {
 				isThereArchive = false;
 			}