public CochangeApriori calculeApriori(final FilePair cochange) {
Long totalIssues = issueRepository.countFixedIssues();
Long file1Issues = fileRepository.calculeNumberOfIssues(cochange.getFile1());
Long file2Issues = fileRepository.calculeNumberOfIssues(cochange.getFile2());
Long cochangeIssues = fileRepository.countFixedIssues(cochange);
CochangeApriori apriori =
new CochangeApriori(
cochange.getFile1(),
cochange.getFile2(),
file1Issues,
file2Issues,
cochangeIssues,
totalIssues);
return apriori;
}
@Override
public AssociationRuleLog process(Project project) throws Exception {
commitRepository.setProject(project);
issueRepository.setProject(project);
fileRepository.setProject(project);
issuesMetricsRepository.setProject(project);
networkMetricsRepository.setProject(project);
fileMetricsRepository.setProject(project);
commitMetricsRepository.setProject(project);
predictionRepository.setProject(project);
AssociationRuleLog associationRuleLog = new AssociationRuleLog(project, "Zimmermann");
associationRuleLog.start();
final Predicate<File> fileFilter = FileFilter.getFilterByFilename(filter);
// select new commits
final List<Commit> newCommits;
if (StringUtils.isBlank(issueKey)) {
newCommits = commitRepository.selectNewCommitsForAssociationRule();
} else {
newCommits = commitRepository.selectCommitsOf(issueKey);
}
for (Commit newCommit : newCommits) {
log.info("Computing metrics for changed files on commit " + newCommit.getId());
// select changed files
final List<File> changedFiles = fileRepository.selectChangedFilesIn(newCommit);
final long totalTransactions = commitRepository.count();
for (File changedFile :
changedFiles.stream().filter(fileFilter).collect(Collectors.toList())) {
log.info("Computing association rule for file " + changedFile.getId() + " in the past.");
// find all issues/commits where file was changed
final List<Issue> issuesOfFile =
issueRepository.selectFixedIssuesOf(changedFile, newCommit);
final Set<Transaction<File>> transactions = new LinkedHashSet<>();
long issuesProcessed = 0;
for (Issue issue : issuesOfFile) {
log.info(++issuesProcessed + " of " + issuesOfFile.size() + " past issues processed.");
List<Commit> commits = commitRepository.selectCommitsOf(issue);
// Transaction is composed by files of commit
for (Commit commit : commits) {
final List<File> changedFilesInIssue = fileRepository.selectChangedFilesIn(commit);
final Transaction<File> transaction =
new Transaction<>(issue.getId().longValue(), new HashSet<>(changedFilesInIssue));
transactions.add(transaction);
}
}
AssociationRuleExtractor<File> extractor =
new AssociationRuleExtractor<>(transactions, totalTransactions);
final Set<AssociationRule<File>> navigationRules =
extractor.queryAssociationRulesSingleConsequent(changedFile);
final List<AssociationRule<File>> orderedPredictions =
AssociationRuleOrdering.sortBySupportAndConfidence(navigationRules);
predictionRepository.savePrediction(newCommit, orderedPredictions, topAssociationRules);
}
}
associationRuleLog.stop();
return associationRuleLog;
}