Java Code Examples for java.io.PrintWriter#checkError()

/**
 * Returns the String representation of an AlloyRelation's settings.
 */
private static String writeEdgeViz(VizState view, VizState defaultView, AlloyRelation x) throws IOException {
    StringWriter sw = new StringWriter();
    PrintWriter out = new PrintWriter(sw);
    writeDotColor(out, view.edgeColor.get(x), defaultView.edgeColor.get(x));
    writeDotStyle(out, view.edgeStyle.get(x), defaultView.edgeStyle.get(x));
    writeBool(out, "visible", view.edgeVisible.get(x), defaultView.edgeVisible.get(x));
    writeBool(out, "merge", view.mergeArrows.get(x), defaultView.mergeArrows.get(x));
    writeBool(out, "layout", view.layoutBack.get(x), defaultView.layoutBack.get(x));
    writeBool(out, "attribute", view.attribute.get(x), defaultView.attribute.get(x));
    writeBool(out, "constraint", view.constraint.get(x), defaultView.constraint.get(x));
    if (view.weight.get(x) != defaultView.weight.get(x))
        out.write(" weight=\"" + view.weight.get(x) + "\"");
    if (x != null && !view.label.get(x).equals(defaultView.label.get(x)))
        Util.encodeXMLs(out, " label=\"", view.label.get(x), "\"");
    if (out.checkError())
        throw new IOException("PrintWriter IO Exception!");
    return sw.toString();
}
 

/**
	 * Creates a temporary file containing the sentences to be processed by ASSERT.
	 * 
	 * @param ss sentences to be parsed
	 * @return input file
	 */
	private static File createInputFile(String[] ss) throws Exception {
		try {
			File input = File.createTempFile("assert", ".input", new File(ASSERT_DIR + "/scripts"));
//			input.deleteOnExit();
			PrintWriter pw = new PrintWriter(new BufferedWriter(
				new OutputStreamWriter(new FileOutputStream(input), "ISO-8859-1")));
			
			for (String sentence : ss) {
				pw.println(sentence);
				if (pw.checkError()) throw new IOException();
			}
			
			pw.close();
			if (pw.checkError()) throw new IOException();
			
			return input;
		} catch (IOException e) {
			throw new IOException("Failed to create input file.");
		}
	}
 

/**
 * Returns the String representation of an AlloyNodeElement's settings.
 */
private static String writeNodeViz(VizState view, VizState defaultView, AlloyNodeElement x) throws IOException {
    StringWriter sw = new StringWriter();
    PrintWriter out = new PrintWriter(sw);
    writeBool(out, "visible", view.nodeVisible.get(x), defaultView.nodeVisible.get(x));
    writeBool(out, "hideunconnected", view.hideUnconnected.get(x), defaultView.hideUnconnected.get(x));
    if (x == null || x instanceof AlloySet) {
        AlloySet s = (AlloySet) x;
        writeBool(out, "showlabel", view.showAsLabel.get(s), defaultView.showAsLabel.get(s));
        writeBool(out, "showinattr", view.showAsAttr.get(s), defaultView.showAsAttr.get(s));
    }
    if (x == null || x instanceof AlloyType) {
        AlloyType t = (AlloyType) x;
        writeBool(out, "numberatoms", view.number.get(t), defaultView.number.get(t));
    }
    writeDotStyle(out, view.nodeStyle.get(x), defaultView.nodeStyle.get(x));
    writeDotShape(out, view.shape.get(x), defaultView.shape.get(x));
    writeDotColor(out, view.nodeColor.get(x), defaultView.nodeColor.get(x));
    if (x != null && !view.label.get(x).equals(defaultView.label.get(x)))
        Util.encodeXMLs(out, " label=\"", view.label.get(x), "\"");
    if (out.checkError())
        throw new IOException("PrintWriter IO Exception!");
    return sw.toString();
}
 

private static void sendCommand(String json, ProcessHandler handler) {
  final PrintWriter stdin = getStdin(handler);
  if (stdin == null) {
    FlutterUtils.warn(LOG, "can't write command to Flutter process: " + json);
    return;
  }
  stdin.write('[');
  stdin.write(json);
  stdin.write("]\n");

  if (FlutterSettings.getInstance().isVerboseLogging()) {
    LOG.info("[--> " + json + "]");
  }

  if (stdin.checkError()) {
    FlutterUtils.warn(LOG, "can't write command to Flutter process: " + json);
  }
}
 

private static void sendCommand(String json, ProcessHandler handler) {
  final PrintWriter stdin = getStdin(handler);
  if (stdin == null) {
    FlutterUtils.warn(LOG, "can't write command to Flutter process: " + json);
    return;
  }
  stdin.write('[');
  stdin.write(json);
  stdin.write("]\n");

  if (FlutterSettings.getInstance().isVerboseLogging()) {
    LOG.info("[--> " + json + "]");
  }

  if (stdin.checkError()) {
    FlutterUtils.warn(LOG, "can't write command to Flutter process: " + json);
  }
}
 

/**
 * If this solution is a satisfiable solution, this method will write it out in
 * XML format.
 */
static void writeInstance(A4Reporter rep, A4Solution sol, PrintWriter out, Iterable<Func> extraSkolems, Map<String,String> sources) throws Err {
    if (!sol.satisfiable())
        throw new ErrorAPI("This solution is unsatisfiable.");
    try {
        Util.encodeXMLs(out, "<alloy builddate=\"", Version.buildDate(), "\">\n\n");
        new A4SolutionWriter(rep, sol, sol.getAllReachableSigs(), sol.getBitwidth(), sol.getMaxSeq(), sol.getOriginalCommand(), sol.getOriginalFilename(), out, extraSkolems);
        if (sources != null)
            for (Map.Entry<String,String> e : sources.entrySet()) {
                Util.encodeXMLs(out, "\n<source filename=\"", e.getKey(), "\" content=\"", e.getValue(), "\"/>\n");
            }
        out.print("\n</alloy>\n");
    } catch (Throwable ex) {
        if (ex instanceof Err)
            throw (Err) ex;
        else
            throw new ErrorFatal("Error writing the solution XML file.", ex);
    }
    if (out.checkError())
        throw new ErrorFatal("Error writing the solution XML file.");
}
 

/**
 * Write the metamodel as <instance>..</instance> in XML format.
 */
public static void writeMetamodel(ConstList<Sig> sigs, String originalFilename, PrintWriter out) throws Err {
    try {
        new A4SolutionWriter(null, null, sigs, 4, 4, "show metamodel", originalFilename, out, null);
    } catch (Throwable ex) {
        if (ex instanceof Err)
            throw (Err) ex;
        else
            throw new ErrorFatal("Error writing the solution XML file.", ex);
    }
    if (out.checkError())
        throw new ErrorFatal("Error writing the solution XML file.");
}
 

public static void main(String[] args) throws Exception {

		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		
		System.out.println("Type something =>");
		String line = reader.readLine();
		
		// this can throw exceptions.
		reader.close();
		
		System.out.println("\nWhat you typed: ");
		BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));
		
		// this can throw exceptions
		writer.write(line);
		writer.flush();
		writer.close();
		
		System.out.println("\nNow, I will print this again with a print writer:");
		PrintWriter pw = new PrintWriter(new OutputStreamWriter(System.out));
		pw.write(line);
		pw.flush();
		// with print writer you have to manually check
		if(pw.checkError()) {
			System.out.println("Wow some error occured!");
		}
	}
 

@Override
public void write(String metric, OutputStream out) {
    PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(out, StandardCharsets.UTF_8), false);
    printWriter.write(metric);
    printWriter.flush();
    if (printWriter.checkError()) {
        throw new RuntimeException("Error writing to Timely");
    }
}
 

public void format(List<MediaFile> files, PrintWriter writer) throws IOException {
    writer.println("#EXTM3U");
    for (MediaFile file : files) {
        writer.println(file.getPath());
    }
    if (writer.checkError()) {
        throw new IOException("Error when writing playlist");
    }
}
 

public void format(List<MediaFile> files, PrintWriter writer) throws IOException {
    writer.println("[playlist]");
    int counter = 0;

    for (MediaFile file : files) {
        counter++;
        writer.println("File" + counter + '=' + file.getPath());
    }
    writer.println("NumberOfEntries=" + counter);
    writer.println("Version=2");

    if (writer.checkError()) {
        throw new IOException("Error when writing playlist.");
    }
}
 

public void format(List<MediaFile> files, PrintWriter writer) throws IOException {
    writer.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
    writer.println("<playlist version=\"1\" xmlns=\"http://xspf.org/ns/0/\">");
    writer.println("    <trackList>");

    for (MediaFile file : files) {
        writer.println("        <track><location>file://" + StringEscapeUtils.escapeXml(file.getPath()) + "</location></track>");
    }
    writer.println("    </trackList>");
    writer.println("</playlist>");

    if (writer.checkError()) {
        throw new IOException("Error when writing playlist.");
    }
}
 

/**
 * sends a message to each of the clients in telnet-friendly output.
 */
public final void send(final String message) {

   final Enumeration ce = connections.elements();
   for (final Enumeration e = writers.elements(); e.hasMoreElements();) {
      final Socket sock = (Socket) ce.nextElement();
      final PrintWriter writer = (PrintWriter) e.nextElement();
      writer.print(message);
      if (writer.checkError()) {
         // The client has closed the connection, remove it from our list:
         connections.remove(sock);
         writers.remove(writer);
      }
   }
}
 

/**
 * Print a DOT representation of search graph.
 *
 * @param file file where to print the DOT representation to.
 *
 * @throws IllegalArgumentException if {@code file} is {@code null}.
 * @throws FileNotFoundException if {@code file} cannot be created or written.
 * @throws IllegalStateException if there was some trouble when writing the DOT representation.
 */
public void printDOT(final File file) throws FileNotFoundException {
    Utils.nonNull(file, "the output file cannot be null");
    final PrintWriter out = new PrintWriter(file);
    printDOT(out);
    if (out.checkError()) {
        throw new IllegalStateException("error occurred while writing k-best haplotype search graph into file '"
                + file.getAbsolutePath() + '\'');
    }
    out.close();
}
 

/** Helper method to write out a full XML file. */
public void writeXML(A4Reporter rep, PrintWriter writer, Iterable<Func> macros, Map<String,String> sourceFiles) throws Err {
    A4SolutionWriter.writeInstance(rep, this, writer, macros, sourceFiles);
    if (writer.checkError())
        throw new ErrorFatal("Error writing the solution XML file.");
}
 

/** Copy Reader to Writer for byteCount bytes or until EOF or exception.
 */
public static void copy(Reader in,
                        Writer out,
                        long byteCount)
     throws IOException
{  
    char buffer[] = new char[bufferSize];
    int len=bufferSize;
    
    if (byteCount>=0)
    {
        while (byteCount>0)
        {
            if (byteCount<bufferSize)
                len=in.read(buffer,0,(int)byteCount);
            else
                len=in.read(buffer,0,bufferSize);                   
            
            if (len==-1)
                break;
            
            byteCount -= len;
            out.write(buffer,0,len);
        }
    }
    else if (out instanceof PrintWriter)
    {
        PrintWriter pout=(PrintWriter)out;
        while (!pout.checkError())
        {
            len=in.read(buffer,0,bufferSize);
            if (len==-1)
                break;
            out.write(buffer,0,len);
        }
    }
    else
    {
        while (true)
        {
            len=in.read(buffer,0,bufferSize);
            if (len==-1)
                break;
            out.write(buffer,0,len);
        }
    }
}
 

/** Copy Reader to Writer for byteCount bytes or until EOF or exception.
 */
public static void copy(Reader in,
                        Writer out,
                        long byteCount)
     throws IOException
{  
    char buffer[] = new char[bufferSize];
    int len=bufferSize;
    
    if (byteCount>=0)
    {
        while (byteCount>0)
        {
            if (byteCount<bufferSize)
                len=in.read(buffer,0,(int)byteCount);
            else
                len=in.read(buffer,0,bufferSize);                   
            
            if (len==-1)
                break;
            
            byteCount -= len;
            out.write(buffer,0,len);
        }
    }
    else if (out instanceof PrintWriter)
    {
        PrintWriter pout=(PrintWriter)out;
        while (!pout.checkError())
        {
            len=in.read(buffer,0,bufferSize);
            if (len==-1)
                break;
            out.write(buffer,0,len);
        }
    }
    else
    {
        while (true)
        {
            len=in.read(buffer,0,bufferSize);
            if (len==-1)
                break;
            out.write(buffer,0,len);
        }
    }
}
 

/** Copy Reader to Writer for byteCount bytes or until EOF or exception.
 */
public static void copy(Reader in,
                        Writer out,
                        long byteCount)
     throws IOException
{  
    char buffer[] = new char[bufferSize];
    int len=bufferSize;
    
    if (byteCount>=0)
    {
        while (byteCount>0)
        {
            if (byteCount<bufferSize)
                len=in.read(buffer,0,(int)byteCount);
            else
                len=in.read(buffer,0,bufferSize);                   
            
            if (len==-1)
                break;
            
            byteCount -= len;
            out.write(buffer,0,len);
        }
    }
    else if (out instanceof PrintWriter)
    {
        PrintWriter pout=(PrintWriter)out;
        while (!pout.checkError())
        {
            len=in.read(buffer,0,bufferSize);
            if (len==-1)
                break;
            out.write(buffer,0,len);
        }
    }
    else
    {
        while (true)
        {
            len=in.read(buffer,0,bufferSize);
            if (len==-1)
                break;
            out.write(buffer,0,len);
        }
    }
}
 

/** Helper method to write out a full XML file. */
public void writeXML(PrintWriter writer, Iterable<Func> macros, Map<String,String> sourceFiles) throws Err {
    A4SolutionWriter.writeInstance(null, this, writer, macros, sourceFiles);
    if (writer.checkError())
        throw new ErrorFatal("Error writing the solution XML file.");
}
 

/**
 * Given a Kodkod formula node, return a Java program that (when compiled and
 * executed) would solve that formula.
 * <p>
 * Requirement: atoms must be String objects (since we cannot possibly output a
 * Java source code that can re-generate arbitrary Java objects).
 *
 * @param formula - the formula to convert
 * @param bitwidth - the integer bitwidth
 * @param atoms - an iterator over the set of all atoms
 * @param bounds - the Kodkod bounds object to use
 * @param atomMap - if nonnull, it is used to map the atom name before printing
 */
public static String convert(Formula formula, int bitwidth, Iterable<String> atoms, Bounds bounds, Map<Object,String> atomMap) {
    StringWriter string = new StringWriter();
    PrintWriter file = new PrintWriter(string);
    new TranslateKodkodToJava(file, formula, bitwidth, atoms, bounds, atomMap);
    if (file.checkError()) {
        return ""; // shouldn't happen
    } else {
        return string.toString();
    }
}