Example usage for java.nio ByteBuffer get

Introduction

In this page you can find the example usage for java.nio ByteBuffer get.

Prototype

public ByteBuffer get(byte[] dest, int off, int len) 

Source Link

Document

Reads bytes from the current position into the specified byte array, starting at the specified offset, and increases the position by the number of bytes read.

Usage

From source file:Main.java

private static byte[] byteBufferToArray(ByteBuffer bb) {
    byte[] bytes = new byte[bb.position()];
    bb.rewind();/* w  ww .j a v a 2 s . c o  m*/
    bb.get(bytes, 0, bytes.length);
    return bytes;
}

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From source file:com.ntsync.shared.ContactGroup.java

private static String readRawString(ByteBuffer src) throws UnsupportedEncodingException {
    int len = src != null ? src.remaining() : -1;
    if (len >= 0) {
        byte[] output = new byte[len];
        src.get(output, 0, len);
        // Android has UTF-8 as default
        return new String(output, SyncDataHelper.DEFAULT_CHARSET_NAME);
    }//from   ww w .  j  a  va 2s.  co m
    return null;
}

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From source file:com.github.chenxiaolong.dualbootpatcher.RomUtils.java

private static boolean usesLiveWallpaper(RomInformation info, MbtoolInterface iface)
        throws IOException, MbtoolException, MbtoolCommandException {
    String wallpaperInfoPath = info.getDataPath() + "/system/users/0/wallpaper_info.xml";

    int id = -1;/*from ww  w.j ava2 s  .  co m*/

    try {
        id = iface.fileOpen(wallpaperInfoPath, new short[] { FileOpenFlag.RDONLY }, 0);

        StatBuf sb = iface.fileStat(id);

        // Check file size
        if (sb.st_size < 0 || sb.st_size > 1024) {
            return false;
        }

        // Read file into memory
        byte[] data = new byte[(int) sb.st_size];
        int nWritten = 0;
        while (nWritten < data.length) {
            ByteBuffer newData = iface.fileRead(id, 10240);

            int nRead = newData.limit() - newData.position();
            newData.get(data, nWritten, nRead);
            nWritten += nRead;
        }

        iface.fileClose(id);
        id = -1;

        String xml = new String(data, Charsets.UTF_8);
        return xml.contains("component=");
    } finally {
        if (id >= 0) {
            try {
                iface.fileClose(id);
            } catch (IOException e) {
                // Ignore
            }
        }
    }
}

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From source file:com.github.chenxiaolong.dualbootpatcher.RomUtils.java

public static CacheWallpaperResult cacheWallpaper(Context context, RomInformation info, MbtoolInterface iface)
        throws IOException, MbtoolException, MbtoolCommandException {
    if (usesLiveWallpaper(info, iface)) {
        // We can't render a snapshot of a live wallpaper
        return CacheWallpaperResult.USES_LIVE_WALLPAPER;
    }/* w  w  w. j a va  2s .  co  m*/

    String wallpaperPath = info.getDataPath() + "/system/users/0/wallpaper";
    File wallpaperCacheFile = new File(info.getWallpaperPath());
    FileOutputStream fos = null;

    int id = -1;

    try {
        id = iface.fileOpen(wallpaperPath, new short[] {}, 0);

        // Check if we need to re-cache the file
        StatBuf sb = iface.fileStat(id);

        if (wallpaperCacheFile.exists() && wallpaperCacheFile.lastModified() / 1000 > sb.st_mtime) {
            Log.d(TAG, "Wallpaper for " + info.getId() + " has not been changed");
            return CacheWallpaperResult.UP_TO_DATE;
        }

        // Ignore large wallpapers
        if (sb.st_size < 0 || sb.st_size > 20 * 1024 * 1024) {
            return CacheWallpaperResult.FAILED;
        }

        // Read file into memory
        byte[] data = new byte[(int) sb.st_size];
        int nWritten = 0;
        while (nWritten < data.length) {
            ByteBuffer newData = iface.fileRead(id, 10240);

            int nRead = newData.limit() - newData.position();
            newData.get(data, nWritten, nRead);
            nWritten += nRead;
        }

        iface.fileClose(id);
        id = -1;

        fos = new FileOutputStream(wallpaperCacheFile);

        // Compression can be very slow (more than 10 seconds) for a large wallpaper, so we'll
        // just cache the actual file instead
        fos.write(data);

        // Load into bitmap
        //Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
        //if (bitmap == null) {
        //    return false;
        //}
        //bitmap.compress(Bitmap.CompressFormat.WEBP, 100, fos);
        //bitmap.recycle();

        // Invalidate picasso cache
        Picasso.with(context).invalidate(wallpaperCacheFile);

        Log.d(TAG, "Wallpaper for " + info.getId() + " has been cached");
        return CacheWallpaperResult.UPDATED;
    } finally {
        if (id >= 0) {
            try {
                iface.fileClose(id);
            } catch (IOException e) {
                // Ignore
            }
        }
        IOUtils.closeQuietly(fos);
    }
}

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From source file:gobblin.util.io.StreamUtils.java

/**
 * Reads the full contents of a ByteBuffer and writes them to an OutputStream. The ByteBuffer is
 * consumed by this operation; eg in.remaining() will be 0 after it completes successfully.
 * @param in  ByteBuffer to write into the OutputStream
 * @param out Destination stream//from   ww  w  .j a  va  2s. c  om
 * @throws IOException If there is an error writing into the OutputStream
 */
public static void byteBufferToOutputStream(ByteBuffer in, OutputStream out) throws IOException {
    final int BUF_SIZE = 8192;

    if (in.hasArray()) {
        out.write(in.array(), in.arrayOffset() + in.position(), in.remaining());
    } else {
        final byte[] b = new byte[Math.min(in.remaining(), BUF_SIZE)];
        while (in.remaining() > 0) {
            int bytesToRead = Math.min(in.remaining(), BUF_SIZE);
            in.get(b, 0, bytesToRead);

            out.write(b, 0, bytesToRead);
        }
    }
}

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From source file:backtype.storm.utils.Utils.java

public static byte[] toByteArray(ByteBuffer buffer) {
    byte[] ret = new byte[buffer.remaining()];
    buffer.get(ret, 0, ret.length);
    return ret;/*from   w ww . j a  v  a  2 s.c o  m*/
}

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From source file:com.fujitsu.dc.test.jersey.bar.BarInstallTestUtils.java

/**
 * bar?.// w w w. j  a v  a 2s.c o  m
 * @param barFile bar?
 * @return ??bar
 */
public static byte[] readBarFile(File barFile) {
    InputStream is = ClassLoader.getSystemResourceAsStream(barFile.getPath());
    ByteBuffer buff = ByteBuffer.allocate(READ_BUFFER_SIZE);
    log.debug(String.valueOf(buff.capacity()));
    try {
        byte[] bbuf = new byte[SIZE_KB];
        int size;
        while ((size = is.read(bbuf)) != -1) {
            buff.put(bbuf, 0, size);
        }
    } catch (IOException e) {
        throw new RuntimeException("failed to load bar file:" + barFile.getPath(), e);
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            throw new RuntimeException("failed to close bar file:" + barFile.getPath(), e);
        }
    }
    int size = buff.position();
    buff.flip();
    byte[] retv = new byte[size];
    buff.get(retv, 0, size);
    return retv;
}

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From source file:adminpassword.Decryption.java

@SuppressWarnings("static-access")
public String decrypt(String encryptedText, String idKey) throws Exception {
    String password = idKey;//from   w  w w . java2 s.  co m

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

    //strip off the salt and iv
    ByteBuffer buffer = ByteBuffer.wrap(new Base64().decode(encryptedText));
    byte[] saltBytes = new byte[20];
    buffer.get(saltBytes, 0, saltBytes.length);
    byte[] ivBytes1 = new byte[cipher.getBlockSize()];
    buffer.get(ivBytes1, 0, ivBytes1.length);
    byte[] encryptedTextBytes = new byte[buffer.capacity() - saltBytes.length - ivBytes1.length];
    buffer.get(encryptedTextBytes);

    // Deriving the key
    SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), saltBytes, 65556, 256);

    SecretKey secretKey = factory.generateSecret(spec);
    SecretKeySpec secret = new SecretKeySpec(secretKey.getEncoded(), "AES");
    cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(ivBytes1));

    byte[] decryptedTextBytes = null;
    try {
        decryptedTextBytes = cipher.doFinal(encryptedTextBytes);

    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    }

    return new String(decryptedTextBytes);
}

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From source file:net.darkmist.alib.io.BufferUtil.java

public static byte[] asBytes(ByteBuffer buf) {
    buf = buf.duplicate();/* w ww .j  av a2s.co  m*/
    /* To use buf.array() the buffer must:
     *    be writable as the array will be writable
     *    have arrayOffset() == 0 or the array will not start at the right location
     *    the returned array must be the same length as the buffer's limit or it will be the wrong size.
     */
    if (!buf.isReadOnly() && buf.hasArray() && buf.arrayOffset() == 0) {
        logger.debug("!read-only, hasArray && offset is 0");
        byte[] ret = buf.array();

        if (ret.length == buf.limit())
            return ret;
        logger.debug("length of array !=limit, doing copy...");
    }

    byte[] bytes = new byte[buf.limit()];
    buf.get(bytes, 0, buf.limit());
    return bytes;
}

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From source file:com.ntsync.shared.RawContact.java

private static String readRawString(ByteBuffer src) throws UnsupportedEncodingException {
    if (src != null) {
        int len = src.remaining();
        if (len >= 0) {
            byte[] output = new byte[len];
            src.get(output, 0, len);
            // Android has UTF-8 as default
            return new String(output, SyncDataHelper.DEFAULT_CHARSET_NAME);
        }/*from   www. j a  v  a2s .  c  om*/
    }
    return null;
}

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