Example usage for java.nio CharBuffer rewind

List of usage examples for java.nio CharBuffer rewind

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Introduction

In this page you can find the example usage for java.nio CharBuffer rewind.

Prototype

public final Buffer rewind()

Source Link

Document

Rewinds this buffer.

Usage

From source file:BufferEquality.java

public static void main(String[] args) {
    CharBuffer cb1 = CharBuffer.allocate(5), cb2 = CharBuffer.allocate(5);
    cb1.put('B').put('u').put('f').put('f').put('A');
    cb2.put('B').put('u').put('f').put('f').put('B');
    cb1.rewind();
    cb2.rewind();/*from w ww. ja  va 2 s.c  o m*/
    System.out.println(cb1.limit(4).equals(cb2.limit(4)));
    // Should be "true"
}

From source file:jenkins.plugins.publish_over_cifs.CifsHostConfiguration.java

@SuppressWarnings("PMD.EmptyCatchBlock")
private static String encode(final String raw) {
    if (raw == null)
        return null;
    final StringBuilder encoded = new StringBuilder(raw.length() * ESCAPED_BUILDER_SIZE_MULTIPLIER);
    final CharsetEncoder encoder = Charset.forName("UTF-8").newEncoder();
    final CharBuffer buffer = CharBuffer.allocate(1);
    for (final char c : raw.toCharArray()) {
        if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
            encoded.append(c);//w w  w .j  a v  a 2s  . c o m
        } else {
            buffer.put(0, c);
            buffer.rewind();
            try {
                final ByteBuffer bytes = encoder.encode(buffer);
                while (bytes.hasRemaining()) {
                    final byte oneByte = bytes.get();
                    encoded.append('%');
                    encoded.append(toDigit((oneByte >> HI_TO_LOW_NIBBLE_BIT_SHIFT) & LOW_NIBBLE_BIT_MASK));
                    encoded.append(toDigit(oneByte & LOW_NIBBLE_BIT_MASK));
                }
            } catch (final CharacterCodingException cce) {
                throw new BapPublisherException(Messages.exception_encode_cce(cce.getLocalizedMessage()), cce);
            }
        }
    }
    return encoded.toString();
}

From source file:foam.blob.RestBlobService.java

@Override
public Blob put_(X x, Blob blob) {
    if (blob instanceof IdentifiedBlob) {
        return blob;
    }/*  www. jav  a 2s  . c  o m*/

    HttpURLConnection connection = null;
    OutputStream os = null;
    InputStream is = null;

    try {
        URL url = new URL(address_);
        connection = (HttpURLConnection) url.openConnection();

        //configure HttpURLConnection
        connection.setConnectTimeout(5 * 1000);
        connection.setReadTimeout(5 * 1000);
        connection.setDoOutput(true);
        connection.setUseCaches(false);

        //set request method
        connection.setRequestMethod("PUT");

        //configure http header
        connection.setRequestProperty("Accept", "*/*");
        connection.setRequestProperty("Connection", "keep-alive");
        connection.setRequestProperty("Content-Type", "application/octet-stream");

        // get connection ouput stream
        os = connection.getOutputStream();

        //output blob into connection
        blob.read(os, 0, blob.getSize());

        if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
            throw new RuntimeException("Upload failed");
        }

        is = connection.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
        CharBuffer cb = CharBuffer.allocate(65535);
        reader.read(cb);
        cb.rewind();

        return (Blob) getX().create(JSONParser.class).parseString(cb.toString(), IdentifiedBlob.class);
    } catch (Throwable t) {
        t.printStackTrace();
        throw new RuntimeException(t);
    } finally {
        IOUtils.closeQuietly(is);
        IOUtils.closeQuietly(os);
        IOUtils.close(connection);
    }
}

From source file:StreamUtil.java

/**
 * Reads the stream and generates a String content using the charset specified.
 * Stream will be closed at the end of the operation.
 * @param in InputStream as the input./* w  w w. java2 s. c  o m*/
 * @param charset The charset to use to create the String object.
 * @return The output String.
 * @throws IOException
 */
public static String inputStream2String(final InputStream is, final Charset charset) throws IOException {
    try {
        StringBuilder out = new StringBuilder();
        byte[] b = new byte[4096];
        byte[] savedBytes = new byte[1];
        boolean hasSavedBytes = false;
        CharsetDecoder decoder = charset.newDecoder();
        for (int n; (n = is.read(b)) != -1;) {
            if (hasSavedBytes) {
                byte[] bTmp = new byte[savedBytes.length + b.length];
                System.arraycopy(savedBytes, 0, bTmp, 0, savedBytes.length);
                System.arraycopy(b, 0, bTmp, savedBytes.length, b.length);
                b = bTmp;
                hasSavedBytes = false;
                n = n + savedBytes.length;
            }

            CharBuffer charBuffer = decodeHelper(b, n, charset);
            if (charBuffer == null) {
                int nrOfChars = 0;
                while (charBuffer == null) {
                    nrOfChars++;
                    charBuffer = decodeHelper(b, n - nrOfChars, charset);
                    if (nrOfChars > 10 && nrOfChars < n) {
                        try {
                            charBuffer = decoder.decode(ByteBuffer.wrap(b, 0, n));
                        } catch (MalformedInputException ex) {
                            throw new IOException(
                                    "File not in supported encoding (" + charset.displayName() + ")", ex);
                        }
                    }
                }
                savedBytes = new byte[nrOfChars];
                hasSavedBytes = true;
                for (int i = 0; i < nrOfChars; i++) {
                    savedBytes[i] = b[n - nrOfChars + i];
                }
            }

            charBuffer.rewind(); // Bring the buffer's pointer to 0
            out.append(charBuffer.toString());
        }
        if (hasSavedBytes) {
            try {
                CharBuffer charBuffer = decoder.decode(ByteBuffer.wrap(savedBytes, 0, savedBytes.length));
            } catch (MalformedInputException ex) {
                throw new IOException("File not in supported encoding (" + charset.displayName() + ")", ex);
            }
        }
        return out.toString();
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

From source file:com.gargoylesoftware.htmlunit.NoHttpResponseTest.java

@Override
public void run() {
    try {//w  w  w.  ja v  a 2 s . c  om
        serverSocket_ = new ServerSocket(port_);
        started_.set(true);
        LOG.info("Starting listening on port " + port_);
        while (!shutdown_) {
            final Socket s = serverSocket_.accept();
            final BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));

            final CharBuffer cb = CharBuffer.allocate(5000);
            br.read(cb);
            cb.flip();
            final String in = cb.toString();
            cb.rewind();

            final RawResponseData responseData = getResponseData(in);

            if (responseData == null || responseData.getStringContent() == DROP_CONNECTION) {
                LOG.info("Closing impolitely in & output streams");
                s.getOutputStream().close();
            } else {
                final PrintWriter pw = new PrintWriter(s.getOutputStream());
                pw.println("HTTP/1.0 " + responseData.getStatusCode() + " " + responseData.getStatusMessage());
                for (final NameValuePair header : responseData.getHeaders()) {
                    pw.println(header.getName() + ": " + header.getValue());
                }
                pw.println();
                pw.println(responseData.getStringContent());
                pw.println();
                pw.flush();
                pw.close();
            }
            br.close();
            s.close();
        }
    } catch (final SocketException e) {
        if (!shutdown_) {
            LOG.error(e);
        }
    } catch (final IOException e) {
        LOG.error(e);
    } finally {
        LOG.info("Finished listening on port " + port_);
    }
}

From source file:hudson.Util.java

/**
 * Encode a single path component for use in an HTTP URL.
 * Escapes all non-ASCII, general unsafe (space and "#%<>[\]^`{|}~)
 * and HTTP special characters (/;:?) as specified in RFC1738,
 * plus backslash (Windows path separator).
 * Note that slash(/) is encoded, so the given string should be a
 * single path component used in constructing a URL.
 * Method name inspired by PHP's rawencode.
 */// www.  j a  v  a  2 s . c o  m
public static String rawEncode(String s) {
    boolean escaped = false;
    StringBuilder out = null;
    CharsetEncoder enc = null;
    CharBuffer buf = null;
    char c;
    for (int i = 0, m = s.length(); i < m; i++) {
        c = s.charAt(i);
        if ((c < 64 || c > 90) && (c < 97 || c > 122) && (c < 38 || c > 57 || c == 47) && c != 61 && c != 36
                && c != 33 && c != 95) {
            if (!escaped) {
                out = new StringBuilder(i + (m - i) * 3);
                out.append(s.substring(0, i));
                enc = Charset.forName("UTF-8").newEncoder();
                buf = CharBuffer.allocate(1);
                escaped = true;
            }
            // 1 char -> UTF8
            buf.put(0, c);
            buf.rewind();
            try {
                for (byte b : enc.encode(buf).array()) {
                    out.append('%');
                    out.append(toDigit((b >> 4) & 0xF));
                    out.append(toDigit(b & 0xF));
                }
            } catch (CharacterCodingException ex) {
            }
        } else if (escaped) {
            out.append(c);
        }
    }
    return escaped ? out.toString() : s;
}

From source file:hudson.Util.java

/**
 * Encode a single path component for use in an HTTP URL.
 * Escapes all non-ASCII, general unsafe (space and "#%<>[\]^`{|}~)
 * and HTTP special characters (/;:?) as specified in RFC1738.
 * (so alphanumeric and !@$&*()-_=+',. are not encoded)
 * Note that slash(/) is encoded, so the given string should be a
 * single path component used in constructing a URL.
 * Method name inspired by PHP's rawurlencode.
 *///from w  ww.j  av  a2  s.com
public static String rawEncode(String s) {
    boolean escaped = false;
    StringBuilder out = null;
    CharsetEncoder enc = null;
    CharBuffer buf = null;
    char c;
    for (int i = 0, m = s.length(); i < m; i++) {
        c = s.charAt(i);
        if (c > 122 || uriMap[c]) {
            if (!escaped) {
                out = new StringBuilder(i + (m - i) * 3);
                out.append(s.substring(0, i));
                enc = Charset.forName("UTF-8").newEncoder();
                buf = CharBuffer.allocate(1);
                escaped = true;
            }
            // 1 char -> UTF8
            buf.put(0, c);
            buf.rewind();
            try {
                ByteBuffer bytes = enc.encode(buf);
                while (bytes.hasRemaining()) {
                    byte b = bytes.get();
                    out.append('%');
                    out.append(toDigit((b >> 4) & 0xF));
                    out.append(toDigit(b & 0xF));
                }
            } catch (CharacterCodingException ex) {
            }
        } else if (escaped) {
            out.append(c);
        }
    }
    return escaped ? out.toString() : s;
}

From source file:org.apache.ofbiz.base.util.UtilIO.java

/** Copy a Reader to an Appendable, optionally closing the input.
 *
 * @param reader the Reader to copy from
 * @param closeIn whether to close the input when the copy is done
 * @param out the Appendable to copy to//from  w  w  w. j  a  va  2s . c  o  m
 * @throws IOException if an error occurs
 */
public static void copy(Reader reader, boolean closeIn, Appendable out) throws IOException {
    try {
        CharBuffer buffer = CharBuffer.allocate(4096);
        while (reader.read(buffer) > 0) {
            buffer.flip();
            buffer.rewind();
            out.append(buffer);
        }
    } finally {
        if (closeIn)
            IOUtils.closeQuietly(reader);
    }
}

From source file:org.colombbus.tangara.io.ScriptReader.java

/**
  * Try to decode a byte buffer with a charset
  */* w w  w  .  j a  v  a2s . com*/
  * @param content
  *            the bute buffer
  * @param cs
  *            the charset
  * @return <code>null</code> if the charset is not supported, or the decoded
  *         string
  */
 private static String tryDecodeBufferWithCharset(ByteBuffer content, Charset cs) {
     CharBuffer buffer = CharBuffer.allocate(content.capacity() * 2);
     CharsetDecoder decoder = createDecoder(cs);
     content.rewind();
     CoderResult coderRes = decoder.decode(content, buffer, true);
     if (coderRes.isError() == false) {
         buffer.rewind();
         return buffer.toString().trim();
     }
     return null;
 }