Example usage for java.io PushbackInputStream PushbackInputStream

Introduction

In this page you can find the example usage for java.io PushbackInputStream PushbackInputStream.

Prototype

public PushbackInputStream(InputStream in) 

Source Link

Document

Creates a PushbackInputStream with a 1-byte pushback buffer, and saves its argument, the input stream in, for later use.

Usage

From source file:Main.java

public static void main(String[] args) {

    byte[] arrByte = new byte[1024];

    byte[] byteArray = new byte[] { 'j', 'a', 'v', 'a', '2', 's', '.', 'c', 'o', 'm' };

    // create object of PushbackInputStream class for specified stream
    InputStream is = new ByteArrayInputStream(byteArray);
    PushbackInputStream pis = new PushbackInputStream(is);

    try {/*from   www  . j  av  a2 s .  c o  m*/

        // read a char into our array
        pis.read(arrByte, 0, 3);

        // print arrByte
        for (int i = 0; i < 3; i++) {
            System.out.println((char) arrByte[i]);
        }

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

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From source file:LineInputStream.java

/**
 * Read a line containing only ASCII characters from the input 
 * stream. A line is terminated by a CR or NL or CR-NL sequence.
 * A common error is a CR-CR-NL sequence, which will also terminate
 * a line.//  w  w  w  . ja  v a 2  s . c o m
 * The line terminator is not returned as part of the returned 
 * String. Returns null if no data is available. <p>
 *
 * This class is similar to the deprecated 
 * <code>DataInputStream.readLine()</code>
 */
public String readLine() throws IOException {
    InputStream in = this.in;
    char[] buf = lineBuffer;

    if (buf == null)
        buf = lineBuffer = new char[128];

    int c1;
    int room = buf.length;
    int offset = 0;

    while ((c1 = in.read()) != -1) {
        if (c1 == '\n') // Got NL, outa here.
            break;
        else if (c1 == '\r') {
            // Got CR, is the next char NL ?
            int c2 = in.read();
            if (c2 == '\r') // discard extraneous CR
                c2 = in.read();
            if (c2 != '\n') {
                // If not NL, push it back
                if (!(in instanceof PushbackInputStream))
                    in = this.in = new PushbackInputStream(in);
                ((PushbackInputStream) in).unread(c2);
            }
            break; // outa here.
        }

        // Not CR, NL or CR-NL ...
        // .. Insert the byte into our byte buffer
        if (--room < 0) { // No room, need to grow.
            buf = new char[offset + 128];
            room = buf.length - offset - 1;
            System.arraycopy(lineBuffer, 0, buf, 0, offset);
            lineBuffer = buf;
        }
        buf[offset++] = (char) c1;
    }

    if ((c1 == -1) && (offset == 0))
        return null;

    return String.copyValueOf(buf, 0, offset);
}

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From source file:org.mcplissken.gateway.vertx.AsyncInputStream.java

public AsyncInputStream(InputStream in, int chunkSize) {
    if (in == null) {
        throw new NullPointerException("in");
    }/*from  w w  w  . j  a v  a 2s  .  c o m*/
    if (chunkSize <= 0) {
        throw new IllegalArgumentException("chunkSize: " + chunkSize + " (expected: a positive integer)");
    }

    if (in instanceof PushbackInputStream) {
        this.in = (PushbackInputStream) in;
    } else {
        this.in = new PushbackInputStream(in);
    }
    this.chunkSize = chunkSize;
    this.executor = Executors.newFixedThreadPool(10);
}

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From source file:org.nuxeo.theme.html.JSMin.java

public JSMin(InputStream in, OutputStream out) {
    this.in = new PushbackInputStream(in);
    this.out = out;
}

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From source file:org.mule.transport.stdio.StdioMessageReceiver.java

@Override
public void poll() {
    String encoding = endpoint.getEncoding();
    try {//from  w  ww  .  j  a va 2s  .  c  o  m
        if (sendStream) {
            PushbackInputStream in = new PushbackInputStream(inputStream);

            //Block until we have some data
            int i = in.read();
            //Roll back our read
            in.unread(i);
            MuleMessage message = createMuleMessage(in, encoding);
            routeMessage(message);
        } else {
            byte[] inputBuffer = new byte[bufferSize];
            int len = inputStream.read(inputBuffer);

            if (len == -1) {
                return;
            }

            StringBuffer fullBuffer = new StringBuffer(bufferSize);
            while (len > 0) {
                fullBuffer.append(new String(inputBuffer, 0, len));
                len = 0; // mark as read
                if (inputStream.available() > 0) {
                    len = inputStream.read(inputBuffer);
                }
            }

            // Each line is a separate message
            String[] lines = fullBuffer.toString().split(SystemUtils.LINE_SEPARATOR);
            for (int i = 0; i < lines.length; ++i) {
                MuleMessage message = createMuleMessage(lines[i], encoding);
                routeMessage(message);
            }
        }

        doConnect();
    } catch (Exception e) {
        getConnector().getMuleContext().getExceptionListener().handleException(e);
    }
}

---

From source file:imageviewer.util.PasswordGenerator.java

private final char[] getPassword(InputStream in, String prompt) throws IOException {

    MaskingThread mt = new MaskingThread(prompt);
    Thread thread = new Thread(mt);
    thread.start();//w ww. j a v  a2s . c  o  m

    char[] lineBuffer;
    char[] buf = lineBuffer = new char[128];

    int room = buf.length;
    int offset = 0;
    int c;

    loop: while (true) {
        switch (c = in.read()) {
        case -1:
        case '\n':
            break loop;
        case '\r':
            int c2 = in.read();
            if ((c2 != '\n') && (c2 != -1)) {
                if (!(in instanceof PushbackInputStream))
                    in = new PushbackInputStream(in);
                ((PushbackInputStream) in).unread(c2);
            } else {
                break loop;
            }
        default:
            if (--room < 0) {
                buf = new char[offset + 128];
                room = buf.length - offset - 1;
                System.arraycopy(lineBuffer, 0, buf, 0, offset);
                Arrays.fill(lineBuffer, ' ');
                lineBuffer = buf;
            }
            buf[offset++] = (char) c;
            break;
        }
    }

    mt.stopMasking();
    if (offset == 0)
        return null;
    char[] ret = new char[offset];
    System.arraycopy(buf, 0, ret, 0, offset);
    Arrays.fill(buf, ' ');
    return ret;
}

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From source file:org.p2pvpn.network.bittorrent.BitTorrentTracker.java

/**
 * Poll the tracker.// ww  w  .j  av  a  2 s. com
 * @param hash the hash of the cuttent network
 * @param port the local port
 * @return a Bencode-Map
 * @throws java.net.MalformedURLException
 * @throws java.io.IOException
 */
private Map<Object, Object> trackerRequest(byte[] hash, int port) throws MalformedURLException, IOException {
    String sUrl = tracker + "?info_hash=" + new String(new URLCodec().encode(hash)) + "&port=" + port
            + "&compact=1&peer_id=" + new String(new URLCodec().encode(peerId))
            + "&uploaded=0&downloaded=0&left=100";

    //System.out.println(sUrl);

    URL url = new URL(sUrl);
    PushbackInputStream in = new PushbackInputStream(url.openStream());
    return (Map<Object, Object>) Bencode.parseBencode(in);
}

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From source file:offstage.crypt.ConfigFilesCrypt.java

/**
     * Reads user password from given input stream.
     *//*from  www.  ja  v a2s . c o  m*/
public static char[] readPassword(InputStream in) throws IOException {
    char[] lineBuffer;
    char[] buf;
    int i;

    buf = lineBuffer = new char[128];

    int room = buf.length;
    int offset = 0;
    int c;

    loop: while (true) {
        switch (c = in.read()) {
        case -1:
        case '\n':
            break loop;

        case '\r':
            int c2 = in.read();
            if ((c2 != '\n') && (c2 != -1)) {
                if (!(in instanceof PushbackInputStream)) {
                    in = new PushbackInputStream(in);
                }
                ((PushbackInputStream) in).unread(c2);
            } else
                break loop;

        default:
            if (--room < 0) {
                buf = new char[offset + 128];
                room = buf.length - offset - 1;
                System.arraycopy(lineBuffer, 0, buf, 0, offset);
                Arrays.fill(lineBuffer, ' ');
                lineBuffer = buf;
            }
            buf[offset++] = (char) c;
            break;
        }
    }

    if (offset == 0) {
        return null;
    }

    char[] ret = new char[offset];
    System.arraycopy(buf, 0, ret, 0, offset);
    Arrays.fill(buf, ' ');

    return ret;
}

---

From source file:in.arun.faces.fo.pdf.FoOutputStream.java

private PdfResult buildPdf(FoOutputStream foOutput) {
    byte[] responseText = foOutput.getBytes();

    if (responseText == null) {
        return null;
    }/* w ww.  j av  a  2s.  c  o m*/

    PdfResult result = new PdfResult();

    try {
        PushbackInputStream pbis = new PushbackInputStream(
                new BufferedInputStream(new ByteArrayInputStream(responseText)));
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        //Skip contentType text/html - Looking for bug fix!
        //pbis.skip(9);
        while (pbis.available() > 0) {
            pbis.mark(1);
            if (pbis.read() == '<') {
                pbis.unread('<');
                break;
            }
        }

        //Transforming XML to PDF
        FopFactory fopFactory = FopFactory.newInstance();
        Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, baos);

        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = tFactory.newTransformer();

        Source src = new StreamSource(pbis);
        Result res = new SAXResult(fop.getDefaultHandler());

        transformer.transform(src, res);

        result.contentType = MimeConstants.MIME_PDF;
        result.content = baos.toByteArray();
    } catch (IOException | FOPException | TransformerException x) {
        logger.log(Level.SEVERE, "Error while trying to create PDF.", x);

        StringBuilder builder = new StringBuilder();

        builder.append(x.getMessage());
        builder.append("<br/>");

        builder.append("<pre>");
        String formattedFo = new String(responseText);
        formattedFo = formattedFo.replaceAll("<", "&lt;");
        formattedFo = formattedFo.replaceAll(">", "&gt;");
        builder.append(formattedFo);
        builder.append("</pre>");

        result.contentType = "text/html";
        result.content = builder.toString().getBytes();
    }

    return result;
}

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From source file:org.wisdom.framework.vertx.AsyncInputStream.java

/**
 * Creates an instance of {@link org.wisdom.framework.vertx.AsyncInputStream}.
 *
 * @param vertx     the Vert.X instance//from  w  ww .  j a  v a  2 s.  co  m
 * @param executor  the executor used to read the chunk
 * @param in        the input stream to read
 * @param chunkSize the chunk size
 */
public AsyncInputStream(Vertx vertx, ExecutorService executor, InputStream in, int chunkSize) {
    if (in == null) {
        throw new NullPointerException("in");
    }
    if (vertx == null) {
        throw new NullPointerException("vertx");
    }
    this.vertx = vertx;
    if (chunkSize <= 0) {
        throw new IllegalArgumentException("chunkSize: " + chunkSize + " (expected: a positive integer)");
    }

    if (in instanceof PushbackInputStream) {
        this.in = (PushbackInputStream) in;
    } else {
        this.in = new PushbackInputStream(in);
    }
    this.chunkSize = chunkSize;
    this.executor = executor;
}

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