public override void CalculateExpertiseForFile(string filename)
{
Debug.Assert(MaxDateTime != DateTime.MinValue, "Initialize MaxDateTime first");
Debug.Assert(SourceRepositoryManager != null, "Initialize SourceRepositoryManager first");
if (!SourceRepositoryManager.FileExists(filename))
{
ClearExpertiseForAllDevelopers(filename); // the file does not exist in the repository, so nobody has experience
return;
}
int filenameId = SourceRepositoryManager.GetFilenameIdFromFilenameApproximation(filename);
int artifactId = SourceRepositoryManager.FindOrCreateFileArtifactId(filename);
using (var repository = new ExpertiseDBEntities())
{
IEnumerable <DeveloperWithEditTime> authors = repository.GetUsersOfRevisionsOfBefore(filenameId, MaxDateTime);
if (!authors.Any())
{
ClearExpertiseForAllDevelopers(filename);
return;
}
// cleanup author list
// deanonymize
authors = authors
.SelectMany(oneOfTheLastUsers => Deduplicator.DeanonymizeAuthor(oneOfTheLastUsers.User)
.Select(clearName => new DeveloperWithEditTime()
{
User = clearName, Time = oneOfTheLastUsers.Time
}))
.OrderByDescending(dev => dev.Time);
// deduplicate deanonymized names
ISet <string> includedAuthors = new HashSet <string>();
IList <DeveloperWithEditTime> deduplicatedAuthors = new List <DeveloperWithEditTime>();
foreach (DeveloperWithEditTime dev in authors)
{
if (includedAuthors.Add(dev.User))
{
deduplicatedAuthors.Add(dev);
}
}
foreach (DeveloperWithEditTime experiencedDeveloper in deduplicatedAuthors)
{
int developerId = repository.Developers.Single(d => d.Name == experiencedDeveloper.User && d.RepositoryId == RepositoryId).DeveloperId;
var developerExpertise = repository.DeveloperExpertises.Include(de => de.DeveloperExpertiseValues).Single(de => de.DeveloperId == developerId && de.ArtifactId == artifactId);
var expertiseValue = FindOrCreateDeveloperExpertiseValue(developerExpertise);
expertiseValue.Value = experiencedDeveloper.Time.UTCDateTime2unixTime();
}
repository.SaveChanges();
}
}
public override void CalculateExpertiseForFile(string filename)
{
Debug.Assert(MaxDateTime != DateTime.MinValue, "Initialize MaxDateTime first");
Debug.Assert(SourceRepositoryManager != null, "Initialize SourceRepositoryManager first");
if (!SourceRepositoryManager.FileExists(filename))
{
ClearExpertiseForAllDevelopers(filename); // the file does not exist in the repository, so nobody has experience
return;
}
int filenameId = SourceRepositoryManager.GetFilenameIdFromFilenameApproximation(filename);
using (var entities = new ExpertiseDBEntities())
{
DeveloperWithEditTime lastUser = entities.GetUserForLastRevisionOfBefore(filenameId, MaxDateTime);
if (lastUser == null) // the file exists but is has not been edited until MaxDateTime. Thus, nobody has expertise.
{
ClearExpertiseForAllDevelopers(filename);
return;
}
IEnumerable <DeveloperWithEditTime> listOfLastDevelopers = Deduplicator.DeanonymizeAuthor(lastUser.User)
.Select(clearName => new DeveloperWithEditTime()
{
User = clearName, Time = lastUser.Time
}); // probably just one, but maybe more
foreach (DeveloperWithEditTime oneOfTheLastDevelopers in listOfLastDevelopers)
{
int developerId = entities.Developers.Single(d => d.Name == oneOfTheLastDevelopers.User && d.RepositoryId == RepositoryId).DeveloperId;
DeveloperExpertise developerExpertise = SourceRepositoryManager.FindDeveloperExpertiseWithArtifactName(entities, developerId, filename);
var expertiseValue = FindOrCreateDeveloperExpertiseValue(developerExpertise);
expertiseValue.Value = oneOfTheLastDevelopers.Time.UTCDateTime2unixTime();
}
entities.SaveChanges();
}
}
public override void CalculateExpertiseForFile(string filename)
{
Debug.Assert(MaxDateTime != DateTime.MinValue, "Initialize MaxDateTime first");
Debug.Assert(SourceRepositoryManager != null, "Initialize SourceRepositoryManager first");
if (!SourceRepositoryManager.FileExists(filename))
{
ClearExpertiseForAllDevelopers(filename); // the file does not exist in the repository, so nobody has experience
return;
}
int filenameId = SourceRepositoryManager.GetFilenameIdFromFilenameApproximation(filename);
List <FileRevision> fileRevisions;
using (var repository = new ExpertiseDBEntities())
{
fileRevisions = repository.FileRevisions.Include(fr => fr.Revision).Where(f => f.FilenameId == filenameId && f.Revision.Time < MaxDateTime).OrderBy(f => f.Revision.Time).AsNoTracking().ToList();
}
if (fileRevisions.Count == 0)
{
// no file revisions yet => no prior changes => nobody knows anything about the file
ClearExpertiseForAllDevelopers(filename);
return;
}
// first author is handled seperately
var added = fileRevisions[0].LinesAdded;
fileRevisions.RemoveAt(0);
// first pass to compute file size frome revision data
int minsize = int.MaxValue, computedsize = 0;
foreach (var file in fileRevisions)
{
computedsize = computedsize + added - file.LinesDeleted;
minsize = Math.Min(computedsize, minsize);
added = file.LinesAdded;
}
computedsize = Math.Abs(minsize);
// second pass to compute the actual ownership
int artifactId = SourceRepositoryManager.FindOrCreateFileArtifactId(filename);
var developerLookup = new Dictionary <string, DeveloperExpertiseValue>();
using (var repository = new ExpertiseDBEntities())
{
List <Developer> developers = repository.DeveloperExpertises
.Where(de => de.ArtifactId == artifactId && de.Inferred == false && (de.DeliveriesCount > 0 || de.IsFirstAuthor))
.Select(de => de.Developer).Distinct().ToList();
foreach (var developer in developers)
{
var developerExpertise =
repository.DeveloperExpertises.Include(de => de.DeveloperExpertiseValues).Single(
de => de.DeveloperId == developer.DeveloperId && de.ArtifactId == artifactId);
var expertiseValue = FindOrCreateDeveloperExpertiseValue(developerExpertise);
expertiseValue.Value = developerExpertise.IsFirstAuthor ? 1f : 0f;
// inside loop to get updated generated Ids
repository.SaveChanges();
developerLookup.Add(developer.Name, expertiseValue);
}
foreach (var file in fileRevisions)
{
computedsize = computedsize + file.LinesAdded - file.LinesDeleted;
foreach (var kvp in developerLookup)
{
var expertiseValue = kvp.Value;
expertiseValue.Value = expertiseValue.Value * (computedsize - file.LinesDeleted) / computedsize;
expertiseValue.Value = double.IsInfinity(expertiseValue.Value) ? 0 : expertiseValue.Value;
expertiseValue.Value = double.IsNaN(expertiseValue.Value) ? 0 : expertiseValue.Value;
if (kvp.Key == file.Revision.User)
{
expertiseValue.Value = expertiseValue.Value + (file.LinesAdded / (double)computedsize);
}
expertiseValue.Value = double.IsNaN(expertiseValue.Value) ? 0 : expertiseValue.Value;
expertiseValue.Value = double.IsInfinity(expertiseValue.Value) ? 0 : expertiseValue.Value;
}
}
repository.SaveChanges();
}
}