Example usage for java.nio ByteBuffer limit

Introduction

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

Prototype

public final int limit() 

Source Link

Document

Returns the limit of this buffer.

Usage

From source file:org.apache.cassandra.db.HintedHandOffManager.java

private static String[] getTableAndCFNames(ByteBuffer joined) {
    int index = ByteBufferUtil.lastIndexOf(joined, SEPARATOR.getBytes(UTF_8)[0], joined.limit());

    if (index == -1 || index < (joined.position() + 1))
        throw new RuntimeException("Corrupted hint name " + ByteBufferUtil.bytesToHex(joined));

    try {/*from   w ww  .ja  va  2  s .  co  m*/
        return new String[] { ByteBufferUtil.string(joined, joined.position(), index - joined.position()),
                ByteBufferUtil.string(joined, index + 1, joined.limit() - (index + 1)) };
    } catch (CharacterCodingException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.tongbanjie.tarzan.rpc.protocol.RpcCommand.java

public static RpcCommand decode(final ByteBuffer byteBuffer) {
    ///*from w  w w .  jav a  2  s  . co  m*/
    int length = byteBuffer.limit();
    //?? 1byte
    byte protocolType = byteBuffer.get();
    //Header 4type
    int headerLength = byteBuffer.getInt();
    //Header
    byte[] headerData = new byte[headerLength];
    byteBuffer.get(headerData);

    RpcCommand cmd = headerDecode(headerData, getProtocolType(protocolType));
    //body
    int bodyLength = length - 5 - headerLength;
    byte[] bodyData = null;
    if (bodyLength > 0) {
        bodyData = new byte[bodyLength];
        byteBuffer.get(bodyData);
    }
    cmd.body = bodyData;

    return cmd;
}

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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  w ww .  j av  a  2 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:Main.java

/**
 * Returns new byte buffer whose content is a shared subsequence of this buffer's content
 * between the specified start (inclusive) and end (exclusive) positions. As opposed to
 * {@link ByteBuffer#slice()}, the returned buffer's byte order is the same as the source
 * buffer's byte order.//  www  . j  a v a 2 s  .  co m
 */
private static ByteBuffer sliceFromTo(final ByteBuffer source, final int start, final int end) {
    if (start < 0) {
        throw new IllegalArgumentException("start: " + start);
    }
    if (end < start) {
        throw new IllegalArgumentException("end < start: " + end + " < " + start);
    }
    final int capacity = source.capacity();
    if (end > source.capacity()) {
        throw new IllegalArgumentException("end > capacity: " + end + " > " + capacity);
    }
    final int originalLimit = source.limit();
    final int originalPosition = source.position();
    try {
        source.position(0);
        source.limit(end);
        source.position(start);
        final ByteBuffer result = source.slice();
        result.order(source.order());
        return result;
    } finally {
        source.position(0);
        source.limit(originalLimit);
        source.position(originalPosition);
    }
}

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From source file:org.apache.cassandra.utils.ByteBufferUtil.java

public static String bytesToHex(ByteBuffer bytes) {
    StringBuilder sb = new StringBuilder();
    for (int i = bytes.position(); i < bytes.limit(); i++) {
        int bint = bytes.get(i) & 0xff;
        if (bint <= 0xF)
            // toHexString does not 0 pad its results.
            sb.append("0");
        sb.append(Integer.toHexString(bint));
    }/*  w  w  w  .  j  av a 2s. com*/
    return sb.toString();
}

---

From source file:com.healthmarketscience.jackcess.impl.office.EncryptionHeader.java

public static EncryptionHeader read(ByteBuffer encProvBuf, Set<CryptoAlgorithm> validCryptoAlgos,
        Set<HashAlgorithm> validHashAlgos) {
    // read length of header
    int headerLen = encProvBuf.getInt();

    // read header (temporarily narrowing buf to header)
    int curLimit = encProvBuf.limit();
    int curPos = encProvBuf.position();
    encProvBuf.limit(curPos + headerLen);
    EncryptionHeader header = new EncryptionHeader(encProvBuf);

    // verify parameters
    if (!validCryptoAlgos.contains(header.getCryptoAlgorithm())) {
        throw new IllegalStateException(header + " crypto algorithm must be one of " + validCryptoAlgos);
    }/*from   ww w . j a  v a  2 s.  com*/

    if (!validHashAlgos.contains(header.getHashAlgorithm())) {
        throw new IllegalStateException(header + " hash algorithm must be one of " + validHashAlgos);
    }

    int keySize = header.getKeySize();
    if (!header.getCryptoAlgorithm().isValidKeySize(keySize)) {
        throw new IllegalStateException(header + " key size is outside allowable range");
    }
    if ((keySize % 8) != 0) {
        throw new IllegalStateException(header + " key size must be multiple of 8");
    }

    // move to after header
    encProvBuf.limit(curLimit);
    encProvBuf.position(curPos + headerLen);

    return header;
}

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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;
    }//from   w  w w  .  j av  a 2  s  . c om

    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:org.apache.solr.handler.TestBlobHandler.java

public static void postData(CloudSolrClient cloudClient, String baseUrl, String blobName, ByteBuffer bytarr)
        throws IOException {
    HttpPost httpPost = null;//from  w w w  .  ja va 2  s. com
    HttpEntity entity;
    String response = null;
    try {
        httpPost = new HttpPost(baseUrl + "/.system/blob/" + blobName);
        httpPost.setHeader("Content-Type", "application/octet-stream");
        httpPost.setEntity(new ByteArrayEntity(bytarr.array(), bytarr.arrayOffset(), bytarr.limit()));
        entity = cloudClient.getLbClient().getHttpClient().execute(httpPost).getEntity();
        try {
            response = EntityUtils.toString(entity, StandardCharsets.UTF_8);
            Map m = (Map) ObjectBuilder.getVal(new JSONParser(new StringReader(response)));
            assertFalse("Error in posting blob " + getAsString(m), m.containsKey("error"));
        } catch (JSONParser.ParseException e) {
            log.error("$ERROR$", response, e);
            fail();
        }
    } finally {
        httpPost.releaseConnection();
    }
}

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From source file:com.unister.semweb.drums.TestUtils.java

/**
 * Reads from the given numbe of elements (<code>numberOfElementsToRead</code>) from the given file from the
 * beginning./*  www.j av  a2 s  . c om*/
 */
public static List<DummyKVStorable> readFrom(String filename, int numberOfElementsToRead) throws Exception {
    HeaderIndexFile<DummyKVStorable> file = new HeaderIndexFile<DummyKVStorable>(filename, AccessMode.READ_ONLY,
            1, TestUtils.gp);
    ByteBuffer dataBuffer = ByteBuffer.allocate(numberOfElementsToRead * TestUtils.gp.getElementSize());
    file.read(0, dataBuffer);
    dataBuffer.flip();

    List<DummyKVStorable> readData = new ArrayList<DummyKVStorable>();
    while (dataBuffer.position() < dataBuffer.limit()) {
        byte[] oneLinkData = new byte[TestUtils.gp.getElementSize()];
        dataBuffer.get(oneLinkData);
        DummyKVStorable oneDate = TestUtils.gp.getPrototype().fromByteBuffer(ByteBuffer.wrap(oneLinkData));
        readData.add(oneDate);
    }
    file.close();
    return readData;
}

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From source file:io.mycat.util.ByteBufferUtil.java

/**
 * ByteBuffer adaptation of org.apache.commons.lang3.ArrayUtils.lastIndexOf method
 *
 * @param buffer the array to traverse for looking for the object, may be <code>null</code>
 * @param valueToFind the value to find/*from   w  ww .j a  v a 2  s  .  c  o  m*/
 * @param startIndex the start index (i.e. BB position) to travers backwards from
 * @return the last index (i.e. BB position) of the value within the array
 * [between buffer.position() and buffer.limit()]; <code>-1</code> if not found.
 */
public static int lastIndexOf(ByteBuffer buffer, byte valueToFind, int startIndex) {
    assert buffer != null;

    if (startIndex < buffer.position()) {
        return -1;
    } else if (startIndex >= buffer.limit()) {
        startIndex = buffer.limit() - 1;
    }

    for (int i = startIndex; i >= buffer.position(); i--) {
        if (valueToFind == buffer.get(i)) {
            return i;
        }
    }

    return -1;
}

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