static void toHexString(String header, ByteBuffer buf) {
sb.delete(0, sb.length());
for (int index = 0; index < buf.limit(); index++) {
String hex = Integer.toHexString(0x0100 + (buf.get(index) & 0x00FF)).substring(1);
sb.append((hex.length() < 2 ? "0" : "") + hex + " ");
}
LOG.debug(
"hex->"
+ header
+ ": position,limit,capacity "
+ buf.position()
+ ","
+ buf.limit()
+ ","
+ buf.capacity());
LOG.debug("hex->" + sb.toString());
}
static byte[] extractByteArray(ByteBuffer buf) {
int len = buf.getInt();
if (len > 0) {
byte[] a = new byte[len];
buf.get(a, 0, len);
return a;
} else return new byte[0];
}
static void insertString(String str, ByteBuffer buf) throws java.io.UnsupportedEncodingException {
if (str != null && str.length() > 0) {
buf.putInt(str.length() + 1);
buf.put(str.getBytes("UTF-8"), 0, str.length());
buf.put((byte) 0);
} else { // buffer is null or length 0
buf.putInt(0);
}
}
static void printBBInfo(ByteBuffer buf) {
LOG.debug(
"Info : position,limit,capacity "
+ buf.position()
+ ","
+ buf.limit()
+ ","
+ buf.capacity());
}
static void insertByteString(byte[] array, ByteBuffer buf)
throws java.io.UnsupportedEncodingException {
if (array != null && array.length > 0) {
buf.putInt(array.length);
buf.put(array, 0, array.length);
buf.put((byte) 0);
} else { // buffer is null or length 0
buf.putInt(0);
}
}
static byte[] extractByteString(ByteBuffer buf) {
int len = buf.getInt();
byte[] str = null;
if (len > 0) {
str = new byte[len];
buf.get(str, 0, len);
buf.get(); // trailing null
} else str = new byte[0];
return str;
}
static String extractString(ByteBuffer buf) throws java.io.UnsupportedEncodingException {
int len = buf.getInt();
byte[] str = null;
if (len > 0) {
str = new byte[len - 1];
;
buf.get(str, 0, len - 1);
buf.get(); // trailing null
} else str = new byte[0];
return new String(str, "UTF-8");
}
static void insertByteArray(byte[] array, ByteBuffer buf) {
if (array != null && array.length > 0) {
buf.putInt(array.length);
buf.put(array, 0, array.length);
} else buf.putInt(0);
}