/// <summary>
/// Decode hex string into Sgtin class instance <see cref="Sgtin96"/>
/// </summary>
/// <param name="hex"></param>
/// <returns></returns>
public static Sgtin96 HexStringToSgtin96(string hex)
{
// validate by string length and convert to bit array
if (hex.Length != 24)
{
throw new FormatException("Provided hexString must be 24 characters long.");
}
BitArray bits = SgtinDecoder.HexStringToBitArray(hex);
// validate and get header
uint header = SgtinDecoder.BitArrayToUInt(bits, 0, 8);
if (header != Sgtin96Header)
{
throw new FormatException("Provided header is not valid SGTIN96 header.");
}
// get filter and partition uInt from bits
SgtinFilter filter = (SgtinFilter)SgtinDecoder.BitArrayToUInt(bits, 8, 3);
byte partition = (byte)SgtinDecoder.BitArrayToUInt(bits, 11, 3);
// decode partition related values
ulong companyPrefix;
uint itemReference;
SgtinDecoder.DecodePartition(bits, SgtinPartitions, partition, out companyPrefix, out itemReference);
// get serial uLong
ulong serialReference = SgtinDecoder.BitArrayToULong(bits, 58, 38);
// init and return new class instance
return(new Sgtin96(Sgtin96Header, filter, partition, companyPrefix, itemReference, serialReference));
}
/// <summary>
/// Decode partition related sgtin values using default partition table
/// </summary>
/// <param name="bits"></param>
/// <param name="partitionDefaults"></param>
/// <param name="partition"></param>
/// <param name="companyPrefix"></param>
/// <param name="itemReference"></param>
internal static void DecodePartition(BitArray bits, ISgtinPartition[] partitionDefaults, byte partition, out ulong companyPrefix, out uint itemReference)
{
if (partitionDefaults.Length < partition || partitionDefaults[partition] == null)
{
throw new FormatException("Partition value is invalid or undefined.");
}
int startingBit = 14;
ISgtinPartition partitionDefault = partitionDefaults[partition];
int companyPrefixDefaultBits = partitionDefault.CompanyPrefixBits;
int itemReferenceDefaultBits = partitionDefault.ItemReferenceBits;
companyPrefix = SgtinDecoder.BitArrayToULong(bits, startingBit, companyPrefixDefaultBits);
itemReference = SgtinDecoder.BitArrayToUInt(bits, startingBit + companyPrefixDefaultBits, itemReferenceDefaultBits);
}
