Examples of java.math.BigInteger.toByteArray()

java.math.BigInteger.toByteArray()
Returns a byte array containing the two's-complement representation of this BigInteger. The byte array will be in big-endian byte-order: the most significant byte is in the zeroth element. The array will contain the minimum number of bytes required to represent this BigInteger, including at least one sign bit, which is {@code (ceil((this.bitLength() +1)/8))}. (This representation is compatible with the {@link #BigInteger(byte[]) (byte[])} constructor.) @return a byte array containing the two's-complement representation ofthis BigInteger. @see #BigInteger(byte[])

     */
    static Object tileKey(PlanarImage owner, int tileX, int tileY) {
        long idx = tileY * (long)owner.getNumXTiles() + tileX;


        BigInteger imageID = (BigInteger)owner.getImageID();
        byte[] buf = imageID.toByteArray();
        int length = buf.length;
        byte[] buf1 = new byte[length + 8];
        System.arraycopy(buf, 0, buf1, 0, length);
        for (int i = 7, j = 0; i >= 0; i--, j += 8)
           buf1[length++] = (byte)(idx >> j);

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     */
    static Object tileKey(PlanarImage owner, int tileX, int tileY) {
        long idx = tileY * (long)owner.getNumXTiles() + tileX;


        BigInteger imageID = (BigInteger)owner.getImageID();
        byte[] buf = imageID.toByteArray();
        int length = buf.length;
        byte[] buf1 = new byte[length + 8];
        System.arraycopy(buf, 0, buf1, 0, length);
        for (int i = 7, j = 0; i >= 0; i--, j += 8)
           buf1[length++] = (byte)(idx >> j);

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            imageID = (BigInteger)((PlanarImage)owner).getImageID();
        else if (owner instanceof SerializableRenderedImage)
            imageID = (BigInteger)((SerializableRenderedImage)owner).getImageID();


        if (imageID != null) {
            byte[] buf = imageID.toByteArray();
            int length = buf.length;
            byte[] buf1 = new byte[length + 8];
            System.arraycopy(buf, 0, buf1, 0, length);
            for (int i = 7, j = 0; i >= 0; i--, j += 8)
                buf1[length++] = (byte)(idx >> j);

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        while ( ( line = bufReader.readLine() ) != null )
        {
            String[] nodeTokenPair = line.split(" ");
            /* Add the node and the token pair into the header of this message. */
            BigInteger nodeToken = new BigInteger(nodeTokenPair[1]);
            tokenUpdateMessage.addHeader(nodeTokenPair[0], nodeToken.toByteArray());
        }
        
        System.out.println("Sending a token update message to " + target);
        MessagingService.getMessagingInstance().sendOneWay(tokenUpdateMessage, target);
        Thread.sleep(TokenUpdater.waitTime_);

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     */
    @Deprecated
    public static String decryptLegacy (String str, byte[] key) {
        BigInteger in = new BigInteger(str, 16).xor(new BigInteger(1, key));
        try {
            return new String(in.toByteArray(), "utf8");
        } catch (UnsupportedEncodingException e) {
            return "";
        } catch (NumberFormatException e) {
            Logger.logError("Error occurred during legacy decryption");
            return "";

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        @Override
        public ByteBuffer serialize(BigDecimal value) {
            BigInteger bi = value.unscaledValue();
            int scale = value.scale();
            byte[] bibytes = bi.toByteArray();


            ByteBuffer bytes = ByteBuffer.allocate(4 + bibytes.length);
            bytes.putInt(scale);
            bytes.put(bibytes);
            bytes.rewind();

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        final int signum = v.signum();
        BigInteger val = v;
        if (signum < 0) {
            val = val.negate();
        }
        final byte[] magnitude = val.toByteArray();
        final int n = magnitude.length;
        // Reverse the array to make it little endian.
        for (int i = 0, j = n; i < j--; i++) {
            // Swap [i] with [j]
            final byte b = magnitude[i];

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          val >>= 8;
        }
        } else { // Larger integer case
        BigInteger big_int = ei.bigintValue();


        byte[] bytes = big_int.toByteArray();
        int src_pos = bytes.length;
        while (--src_pos >= 0 && nBytes-- > 0) {
          data[pos] = bytes[src_pos];
          pos += delta;
        }

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    final String channelName = channel.name;
    final Delivery channelDelivery = channel.delivery;
    if (logger.isLoggable(Level.FINEST)) {
        logger.log(
      Level.FINEST, "sending refresh, channel:{0}",
      HexDumper.toHexString(channelRefId.toByteArray()));
    }
    for (final long nodeId : channel.servers) {
        channelService.addChannelTask(
          channelRefId,
      new IoRunnable() {

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    {
        if (value == null) return ByteBufferUtil.EMPTY_BYTE_BUFFER;
        
        BigInteger bi = value.unscaledValue();
        Integer scale = value.scale();
        byte[] bibytes = bi.toByteArray();
        byte[] sbytes = ByteBufferUtil.bytes(scale).array();
        byte[] bytes = new byte[bi.toByteArray().length+4];
        
        for (int i = 0 ; i < 4 ; i++) bytes[i] = sbytes[i];
        for (int i = 4 ; i < bibytes.length+4 ; i++) bytes[i] = bibytes[i-4];

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