fromBuffer static method

String fromBuffer(List<int> buffer)

Converts a binary buffer to a UUIDv4 string.

Parameters:

• buffer: The binary buffer representing the UUID.

Throws:

• ArgumentException if the input buffer's length is not 16 bytes, as UUIDv4 buffers must be exactly 16 bytes long.

Implementation

static String fromBuffer(List<int> buffer) {
  if (buffer.length != 16) {
    throw ArgumentException.invalidOperationArguments(
      "fromBuffer",
      name: "buffer",
      reason: "Invalid UUID V4 bytes length.",
      expecteLen: 16,
    );
  }

  final List<String> hexBytes =
      buffer.map((byte) => byte.toRadixString(16).padLeft(2, '0')).toList();

  /// Insert dashes at appropriate positions to form a UUIDv4 string
  return '${hexBytes.sublist(0, 4).join('')}-${hexBytes.sublist(4, 6).join('')}-${hexBytes.sublist(6, 8).join('')}-${hexBytes.sublist(8, 10).join('')}-${hexBytes.sublist(10).join('')}';
}