tlvEncode method

String tlvEncode(
  1. List<TLV> tlvList
)

Encodes a list of TLV objects into a TLV encoded string.

This method processes a list of TLV objects and converts each object into its corresponding TLV format by concatenating the tag, length (as a 2-digit number), and the value. It returns the concatenated string representing the encoded TLV data.

  • Parameters:

    • tlvList: A list of TLV objects that need to be encoded into the TLV format.

  • Returns: A string representing the encoded TLV data, with each tag-length-value pair concatenated together.

Example:

TLVService tlvService = TLVService();
List<TLV> tlvList = [
  TLV("00", 12, "345A"),
  TLV("01", 3, "ABC")
];
String encoded = tlvService.tlvEncode(tlvList);
print(encoded); // "0012345A0103ABC"

Implementation

String tlvEncode(List<TLV> tlvList) {
  StringBuffer encodedData = StringBuffer();

  for (var tlv in tlvList) {
    String length = tlv.length.toString().padLeft(2, '0');
    encodedData.write(tlv.tag);
    encodedData.write(length);
    encodedData.write(tlv.value);
  }

  return encodedData.toString();
}