Example usage for java.nio ByteBuffer wrap

List of usage examples for java.nio ByteBuffer wrap

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Introduction

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

Prototype

public static ByteBuffer wrap(byte[] array, int start, int len)

Source Link

Document

Creates a new byte buffer by wrapping the given byte array.

Usage

From source file:Util.java

public void write(File dest, InputStream in) {
    FileChannel channel = null;/*from w w w  . jav  a  2  s . com*/
    try {
        channel = new FileOutputStream(dest).getChannel();
    } catch (FileNotFoundException e) {
        System.out.println(e);
    }
    try {
        int byteCount = 0;
        byte[] buffer = new byte[BUFFER_SIZE];
        int bytesRead = -1;
        while ((bytesRead = in.read(buffer)) != -1) {
            ByteBuffer byteBuffer = ByteBuffer.wrap(buffer, 0, bytesRead);
            channel.write(byteBuffer);
            byteCount += bytesRead;
        }

    } catch (IOException e) {
        System.out.println(e);
    } finally {

        try {
            if (channel != null) {
                channel.close();
            }
            if (in != null) {
                in.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

From source file:com.cloud.utils.NumbersUtil.java

public static long bytesToLong(byte b[], int pos) {
    return ByteBuffer.wrap(b, pos, 8).getLong();
}

From source file:Main.java

public static void copyInputStreamToFile(InputStream inputStream, File file) throws IOException {
    FileOutputStream fileOutputStream = null;
    FileChannel fileChannel = null;
    try {/*from  w  w  w .  java2  s .  co  m*/
        fileOutputStream = new FileOutputStream(file);
        fileChannel = fileOutputStream.getChannel();
        byte[] bArr = new byte[4096];
        while (true) {
            int read = inputStream.read(bArr);
            if (read <= 0) {
                break;
            }
            fileChannel.write(ByteBuffer.wrap(bArr, SYSTEM_ROOT_STATE_DISABLE, read));
        }

    } catch (Throwable throwable) {
        throwable.printStackTrace();
    } finally {

        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        if (fileChannel != null) {
            try {
                fileChannel.close();
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        if (fileOutputStream != null) {
            try {
                fileOutputStream.close();
            } catch (Exception e22) {
                e22.printStackTrace();
            }
        }
    }
}

From source file:Main.java

public static void copyInputStreamToFile(InputStream inputStream, File file) throws IOException {
    FileOutputStream fileOutputStream = null;
    Throwable th;//from  w  ww.j ava  2  s . c  o m
    FileChannel fileChannel = null;
    try {
        fileOutputStream = new FileOutputStream(file);
        try {
            fileChannel = fileOutputStream.getChannel();
            byte[] bArr = new byte[4096];
            while (true) {
                int read = inputStream.read(bArr);
                if (read <= 0) {
                    break;
                }
                fileChannel.write(ByteBuffer.wrap(bArr, SYSTEM_ROOT_STATE_DISABLE, read));
            }
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (fileChannel != null) {
                try {
                    fileChannel.close();
                } catch (Exception e2) {
                    e2.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (Exception e22) {
                    e22.printStackTrace();
                }
            }
        } catch (Throwable th2) {
            th = th2;
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (Exception e3) {
                    e3.printStackTrace();
                }
            }
            if (fileChannel != null) {
                try {
                    fileChannel.close();
                } catch (Exception e4) {
                    e4.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (Exception e42) {
                    e42.printStackTrace();
                }
            }
            throw th;
        }
    } catch (Throwable th3) {
        th = th3;
        Object obj = fileChannel;
        if (inputStream != null) {
            inputStream.close();
        }
        if (fileChannel != null) {
            fileChannel.close();
        }
        if (fileOutputStream != null) {
            fileOutputStream.close();
        }

    }
}

From source file:com.easemob.dataexport.utils.ConversionUtils.java

/**
 * @param uuid/*from w  ww.  j  a  v  a 2s.c o  m*/
 * @param offset
 * @return
 */
public static UUID uuid(byte[] uuid, int offset) {
    ByteBuffer bb = ByteBuffer.wrap(uuid, offset, 16);
    return new UUID(bb.getLong(), bb.getLong());
}

From source file:neembuu.httpserver.VFileEntity.java

@Override
public InputStream getContent() throws IOException, IllegalStateException {
    return new InputStream() {
        long pos = startingOffset;

        @Override//from www .j  a v  a2 s  . co  m
        public int read() throws IOException {
            throw new IllegalStateException("This is not used.");
        }

        @Override
        public int read(byte[] b) throws IOException {
            return read(b, 0, b.length); //To change body of generated methods, choose Tools | Templates.
        }

        @Override
        public int read(byte[] b, int off, int len) throws IOException {
            ByteBuffer bb = ByteBuffer.wrap(b, 0, len);
            BlockingReadRequest brr = new BlockingReadRequest(bb, pos);
            try {
                af.read(new SimpleReadRequest(bb, pos));
            } catch (Exception a) {
                IOException ioe = new IOException();
                ioe.addSuppressed(a);
            }
            int read = brr.read();
            pos += read;
            return read;
        }

    };
}

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.//from   w  ww  .j a  v  a2  s  .c  om
 * @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.alibaba.otter.shared.common.utils.ByteUtils.java

public static int bytes2int(byte[] data, int offset) {
    ByteBuffer buffer = ByteBuffer.wrap(data, offset, 4);
    return buffer.getInt();
}

From source file:com.github.cat.yum.store.base.RpmScan.java

@SuppressWarnings("unused")
private RpmFormat getRpmFormat() throws IOException {
    InputStream sourceStream = null;
    try {//ww  w.  j av a 2 s.c  o  m
        sourceStream = new FileInputStream(this.rpm);

        RpmFormat rpmFormat = new RpmFormat();
        ReadableChannelWrapper in = getReadableChannel(sourceStream);

        Format format = new Format();
        ChannelWrapper.Key<Integer> headerStartKey = in.start();

        ChannelWrapper.Key<Integer> lead = in.start();
        format.getLead().read(in);

        ChannelWrapper.Key<Integer> signature = in.start();
        int count = format.getSignature().read(in);
        AbstractHeader.Entry<?> sigEntry = format.getSignature().getEntry(Signature.SignatureTag.SIGNATURES);
        int expected = sigEntry == null ? 0
                : ByteBuffer.wrap((byte[]) (byte[]) sigEntry.getValues(), 8, 4).getInt() / -16;

        Integer headerStartPos = (Integer) in.finish(headerStartKey);
        format.getHeader().setStartPos(headerStartPos.intValue());
        ChannelWrapper.Key<Integer> headerKey = in.start();
        count = format.getHeader().read(in);
        AbstractHeader.Entry<?> immutableEntry = format.getHeader().getEntry(Header.HeaderTag.HEADERIMMUTABLE);
        expected = immutableEntry == null ? 0
                : ByteBuffer.wrap((byte[]) (byte[]) immutableEntry.getValues(), 8, 4).getInt() / -16;
        Integer headerLength = (Integer) in.finish(headerKey);
        format.getHeader().setEndPos(headerStartPos.intValue() + headerLength.intValue());

        rpmFormat.headerStart = headerStartPos.intValue();
        rpmFormat.headerEnd = (headerStartPos.intValue() + headerLength.intValue());
        rpmFormat.format = format;

        return rpmFormat;
    } finally {
        try {
            sourceStream.close();
        } catch (IOException ignore) {

        }
    }
}

From source file:edu.umass.cs.reconfiguration.reconfigurationutils.ReconfigurationPacketDemultiplexer.java

@Override
public JSONObject processHeader(byte[] msg, NIOHeader header) {
    long t = System.nanoTime();
    int type;/*  www  .ja va2 s.  c om*/
    JSONObject json = null;
    log.log(Level.FINEST, "{0} processHeader received message with header {1}", new Object[] { this, header });
    if (msg.length >= Integer.BYTES
            && ReconfigurationPacket.PacketType.intToType
                    .containsKey(type = ByteBuffer.wrap(msg, 0, 4).getInt())
            && JSONPacket.couldBeJSON(msg, Integer.BYTES)
            && type != PacketType.REPLICABLE_CLIENT_REQUEST.getInt()) {
        json = super.processHeader(msg, Integer.BYTES, header, true);
        if (json != null) {
            if (Util.oneIn(50))
                DelayProfiler.updateDelayNano("processHeader", t);
            return json;
        }
    } else if (!BYTEIFICATION && JSONPacket.couldBeJSON(msg)
            && (json = super.processHeader(msg, header, true)) != null) {
        return json;
    }
    // else prefix msg with addresses
    byte[] stamped = new byte[NIOHeader.BYTES + msg.length];
    ByteBuffer bbuf = ByteBuffer.wrap(stamped);
    bbuf.put(header.toBytes());
    bbuf.put(msg);
    if (Util.oneIn(50))
        DelayProfiler.updateDelayNano("processHeader", t);
    return new JSONMessenger.JSONObjectWrapper(stamped);
}