public BarcodeEntity(int position, string barcode, BarcodePossibility possibility)
{
Position = position;
Barcode = barcode;
Possibility = possibility;
Tag = null;
}
/// <summary>
/// Generate final barcode entity by given section start and end, as well as its posibility
/// </summary>
/// <param name="sectionStart">Section start of given barcodes</param>
/// <param name="sectionEnd">Section end of given barcodes</param>
/// <param name="sectionBarcodes">Barcodes in the section</param>
/// <param name="posibility">Posibility of given barcodes</param>
/// <returns></returns>
private List <BarcodeEntity> GenerateBarcodeEntity(int sectionStart, int sectionEnd, ref Queue <string> sectionBarcodes, BarcodePossibility posibility)
{
List <BarcodeEntity> results = new List <BarcodeEntity>();
// Calculate the length of section and swap start with end if necessary
int sectionLength = Math.Abs(sectionStart - sectionEnd);
if (sectionLength == 0 && sectionBarcodes.Count > 0)
{
BarcodeEntity entity = new BarcodeEntity(sectionStart, sectionBarcodes.Dequeue(), posibility);
results.Add(entity);
// Remove remaining duplicated barcodes
sectionBarcodes.Clear();
}
else if (sectionLength <= sectionBarcodes.Count)
{
for (int i = 0; i < sectionLength; i++)
{
BarcodeEntity entity = new BarcodeEntity(sectionStart < sectionEnd ? (sectionStart + i) : (sectionStart - 1 - i), sectionBarcodes.Dequeue(), posibility);
results.Add(entity);
}
// Clear remaining invalid barcodes in current section
sectionBarcodes.Clear();
}
else if (sectionLength > sectionBarcodes.Count)
{
int length = sectionBarcodes.Count;
for (int i = 0; i < length; i++)
{
BarcodeEntity entity = new BarcodeEntity(sectionStart < sectionEnd ? (sectionStart + i) : (sectionStart - 1 - i), sectionBarcodes.Dequeue(), BarcodePossibility.Unreliable);
results.Add(entity);
}
}
return(results);
}
/// <summary>
/// Main picking procedure
/// </summary>
private void Picking()
{
int sectionStart = -1;
int sectionEnd = -1;
bool isForwardScanning = true;
Queue <string> sectionBarcodes = new Queue <string>();
Queue <string> unsolvedSectionBarcodes = new Queue <string>();
// Endless loop to dequeue barcodes and try to pick sample barcodes from them
while (m_IsWorking)
{
// If no barcodes to pick then wait for a while
if (m_UnprocessedBarcodes.Count == 0)
{
IsFinished = true;
Thread.Sleep(50);
continue;
}
else
{
IsFinished = false;
}
// Dequeue to get barcode
string currentBarcode = m_UnprocessedBarcodes.Dequeue();
// If it is a position barcode
if (m_PosBarcodes.Keys.Contains(currentBarcode))
{
// Calculate section boundaries
if (sectionStart == -1 && sectionEnd == -1)
{
sectionStart = m_PosBarcodes[currentBarcode];
}
else if (sectionStart != -1 && sectionEnd == -1)
{
sectionEnd = m_PosBarcodes[currentBarcode];
}
else
{
sectionStart = sectionEnd;
sectionEnd = m_PosBarcodes[currentBarcode];
}
// If the section is completely determined
// e.g. Position n | barcode | Position n+1
if (sectionStart != -1 && sectionEnd != -1)
{
isForwardScanning = sectionStart < sectionEnd;
BarcodePossibility posibility;
List <BarcodeEntity> results;
// Scan order is confirmed then pick barcodes in unsoloved section
if (unsolvedSectionBarcodes.Count > 0)
{
int unsolvedSectionStart;
int unsolvedSectionEnd;
if (isForwardScanning)
{
unsolvedSectionStart = 1;
unsolvedSectionEnd = sectionStart;
posibility = unsolvedSectionBarcodes.Count == unsolvedSectionEnd - 1 ? BarcodePossibility.MostLikely : BarcodePossibility.Unreliable;
}
else
{
unsolvedSectionStart = m_PosBarcodes.Count + 1;
unsolvedSectionEnd = sectionStart;
posibility = unsolvedSectionBarcodes.Count == m_PosBarcodes.Count + 1 - unsolvedSectionEnd ? BarcodePossibility.MostLikely : BarcodePossibility.Unreliable;
}
results = GenerateBarcodeEntity(unsolvedSectionStart, unsolvedSectionEnd, ref unsolvedSectionBarcodes, posibility);
if (BarcodePicked != null)
{
BarcodePicked(results);
}
}
// Pick barcodes in current section
if (sectionStart != sectionEnd)
{
posibility = sectionBarcodes.Count == Math.Abs(sectionStart - sectionEnd) ? BarcodePossibility.Affirmative : BarcodePossibility.Unreliable;
}
else
{
posibility = sectionStart == m_PosBarcodes.Count ? BarcodePossibility.MostLikely : BarcodePossibility.Unreliable;
}
results = GenerateBarcodeEntity(sectionStart, sectionEnd, ref sectionBarcodes, posibility);
sectionStart = sectionEnd;
sectionEnd = -1;
if (BarcodePicked != null)
{
BarcodePicked(results);
}
}
// If the section has no start position then move them into unsolved section.
// Once the scanning order has been confirmed we can process the unsolved section
// e.g. barcode | Position n | barcode | Position n+1
else if (sectionBarcodes.Count > 0 && sectionStart != -1)
{
while (sectionBarcodes.Count > 0)
{
unsolvedSectionBarcodes.Enqueue(sectionBarcodes.Dequeue());
}
}
}
else
{
// Add sample barcode (non-position barcode) into section cache
sectionBarcodes.Enqueue(currentBarcode);
// If the section has no end position AND unsolved section is empty
// e.g. barcode | Last Position | barcode
if (((isForwardScanning && m_PosBarcodes.Count - (sectionStart - 1) == sectionBarcodes.Count) ||
(!isForwardScanning && sectionStart - 1 == sectionBarcodes.Count && sectionEnd == -1)) &&
unsolvedSectionBarcodes.Count <= 0 && m_UnprocessedBarcodes.Count == 0)
{
int tempSectionStart;
int tempSectionEnd;
if (isForwardScanning)
{
tempSectionStart = sectionStart;
tempSectionEnd = m_PosBarcodes.Count + 1;
}
else
{
tempSectionStart = sectionStart;
tempSectionEnd = 1;
}
List <BarcodeEntity> results = GenerateBarcodeEntity(tempSectionStart, tempSectionEnd, ref sectionBarcodes, BarcodePossibility.MostLikely);
if (BarcodePicked != null)
{
BarcodePicked(results);
}
}
}
}
// There are still some unused barcodes in section cache then make them as unreliable and add to the end
// e.g. barcode | barcode | barcode (no position barcodes)
if (sectionBarcodes.Count > 0)
{
int tempSectionStart;
int tempSectionEnd;
if (isForwardScanning)
{
tempSectionStart = sectionStart == -1 ? 1 : sectionStart;
tempSectionEnd = m_PosBarcodes.Count + 1;
}
else
{
tempSectionStart = sectionStart == -1 ? m_PosBarcodes.Count + 1 : sectionStart;
tempSectionEnd = 1;
}
BarcodePossibility posibility = sectionBarcodes.Count == m_PosBarcodes.Count ? BarcodePossibility.MostLikely : BarcodePossibility.Unreliable;
List <BarcodeEntity> results = GenerateBarcodeEntity(tempSectionStart, tempSectionEnd, ref sectionBarcodes, posibility);
if (BarcodePicked != null)
{
BarcodePicked(results);
}
}
}