/// <summary>
/// The calculate characteristic.
/// </summary>
/// <param name="characteristicLinkId">
/// The characteristic type and link id.
/// </param>
/// <param name="subsequences">
/// The subsequences.
/// </param>
/// <returns>
/// The <see cref="List{Subsequence}"/>.
/// </returns>
private List <double> CalculateCharacteristic(short characteristicLinkId, Subsequence[] subsequences)
{
var characteristics = new List <double>();
var newCharacteristics = new List <CharacteristicValue>();
FullCharacteristic fullCharacteristic = characteristicTypeLinkRepository.GetCharacteristic(characteristicLinkId);
IFullCalculator calculator = FullCalculatorsFactory.CreateCalculator(fullCharacteristic);
Link link = characteristicTypeLinkRepository.GetLinkForCharacteristic(characteristicLinkId);
var subsequenceIds = subsequences.Select(s => s.Id);
var existingCharacteristics = db.CharacteristicValue
.Where(cv => cv.CharacteristicLinkId == characteristicLinkId && subsequenceIds.Contains(cv.SequenceId))
.ToDictionary(cv => cv.SequenceId);
Dictionary <long, Chain> sequences = subsequenceExtractor.GetSubsequencesSequences(subsequences);
for (int i = 0; i < subsequences.Length; i++)
{
if (existingCharacteristics.ContainsKey(subsequences[i].Id))
{
characteristics.Add(existingCharacteristics[subsequences[i].Id].Value);
}
else
{
double value = calculator.Calculate(sequences[subsequences[i].Id], link);
var currentCharacteristic = new CharacteristicValue
{
SequenceId = subsequences[i].Id,
CharacteristicLinkId = characteristicLinkId,
Value = value
};
newCharacteristics.Add(currentCharacteristic);
characteristics.Add(value);
}
}
db.CharacteristicValue.AddRange(newCharacteristics);
db.SaveChanges();
return(characteristics);
}
/// <summary>
/// Calculates subsequences characteristics.
/// </summary>
/// <param name="characteristicIds">
/// The ids of characteristic types, arrangement types and links as <see cref="FullCharacteristicLink"/>.
/// </param>
/// <param name="features">
/// The features ids of subsequences to extract.
/// </param>
/// <param name="parentSequenceId">
/// The parent sequence id.
/// </param>
/// <param name="filters">
/// Textual search filters for subsequences products.
/// </param>
/// <returns>
/// The <see cref="T:SubsequenceData[]"/> .
/// </returns>
public static SubsequenceData[] CalculateSubsequencesCharacteristics(
short[] characteristicIds,
Feature[] features,
long parentSequenceId,
string[] filters = null)
{
Dictionary <long, Chain> sequences;
long[] subsequenceIds;
SubsequenceData[] subsequenceData;
Dictionary <long, Dictionary <short, double> > characteristics;
var calculators = new IFullCalculator[characteristicIds.Length];
var links = new Link[characteristicIds.Length];
var newCharacteristics = new List <CharacteristicValue>();
// creating local context to avoid memory overflow due to possibly big cache of characteristics
using (var db = new LibiadaWebEntities())
{
var subsequenceExtractor = new SubsequenceExtractor(db);
Subsequence[] subsequences = filters == null?
subsequenceExtractor.GetSubsequences(parentSequenceId, features) :
subsequenceExtractor.GetSubsequences(parentSequenceId, features, filters);
subsequenceData = subsequences.Select(s => new SubsequenceData(s)).ToArray();
// converting to libiada sequences
subsequenceIds = subsequences.Select(s => s.Id).ToArray();
characteristics = db.CharacteristicValue
.Where(c => characteristicIds.Contains(c.CharacteristicLinkId) && subsequenceIds.Contains(c.SequenceId))
.ToArray()
.GroupBy(c => c.SequenceId)
.ToDictionary(c => c.Key, c => c.ToDictionary(ct => ct.CharacteristicLinkId, ct => ct.Value));
if (characteristics.Count == subsequences.Length && characteristics.All(c => c.Value.Count == characteristicIds.Length))
{
sequences = new Dictionary <long, Chain>();
}
else
{
sequences = subsequenceExtractor.GetSubsequencesSequences(subsequences);
}
}
var characteristicTypeLinkRepository = FullCharacteristicRepository.Instance;
for (int k = 0; k < characteristicIds.Length; k++)
{
short characteristicLinkId = characteristicIds[k];
FullCharacteristic characteristic = characteristicTypeLinkRepository.GetCharacteristic(characteristicLinkId);
calculators[k] = FullCalculatorsFactory.CreateCalculator(characteristic);
links[k] = characteristicTypeLinkRepository.GetLinkForCharacteristic(characteristicLinkId);
}
// cycle through subsequences
for (int i = 0; i < subsequenceIds.Length; i++)
{
characteristics.TryGetValue(subsequenceIds[i], out Dictionary <short, double> sequenceDbCharacteristics);
sequenceDbCharacteristics = sequenceDbCharacteristics ?? new Dictionary <short, double>();
var values = new double[calculators.Length];
// cycle through characteristics and notations
for (int j = 0; j < calculators.Length; j++)
{
short characteristicLinkId = characteristicIds[j];
if (!sequenceDbCharacteristics.TryGetValue(characteristicLinkId, out values[j]))
{
values[j] = calculators[j].Calculate(sequences[subsequenceIds[i]], links[j]);
var currentCharacteristic = new CharacteristicValue
{
SequenceId = subsequenceIds[i],
CharacteristicLinkId = characteristicLinkId,
Value = values[j]
};
newCharacteristics.Add(currentCharacteristic);
}
}
subsequenceData[i].CharacteristicsValues = values;
}
using (var db = new LibiadaWebEntities())
{
// trying to save calculated characteristics to database
var characteristicRepository = new CharacteristicRepository(db);
characteristicRepository.TrySaveCharacteristicsToDatabase(newCharacteristics);
}
return(subsequenceData);
}