public MultiJoinTests()
{
_inputA = new PassThroughUnit <TestEntityA>();
_inputB = new PassThroughUnit <TestEntityB>();
_inputC = new PassThroughUnit <TestEntityC>();
_sut = new MultiJoin(
new JoinDefinitionAdapter <TestEntityA>(_inputA, "A", e => e.KeyA, _ => Guid.NewGuid()),
new JoinDefinitionAdapter <TestEntityB>(_inputB, "B", e => e.KeyB, _ => Guid.NewGuid()),
new JoinDefinitionAdapter <TestEntityC>(_inputC, "C", e => e.KeyC, _ => Guid.NewGuid()));
var resultInspector = new CallbackSubcriber <IDictionary <string, IList <object> > >(r => _result = r);
_sut.Subscribe(resultInspector);
}
public Engine(IQaApiPublisher qaApiPublisher)
{
_questions = new PassThroughUnit <Question>();
_answers = new PassThroughUnit <Answer>();
_users = new PassThroughUnit <User>();
_questions.Subscribe(new CallbackSubcriber <Question>(q => _maxQuestionId = Math.Max(_maxQuestionId, q.Id)));
_answers.Subscribe(new CallbackSubcriber <Answer>(a => _maxAnswerId = Math.Max(_maxAnswerId, a.Id)));
_users.Subscribe(new CallbackSubcriber <User>(u => _maxUserId = Math.Max(_maxUserId, u.Id)));
var qaJoin = new Join <Question, Answer>(
_questions, _answers,
q => q.Id, a => a.QuestionId,
q => q.Id, a => a.Id);
new QaApiContentMaker(qaJoin).Subscribe(new CallbackSubcriber <QaApiContent>(qaApiPublisher.Publish));
var userStatistics = new MultiJoin(
new JoinDefinitionAdapter <User>(_users, "User", u => u.Id, u => u.Id),
new JoinDefinitionAdapter <Question>(_questions, "Questions", q => q.UserId, q => q.Id),
new JoinDefinitionAdapter <Answer>(_answers, "Answers", a => a.UserId, a => a.Id));
var statMapper = new Mapper <IDictionary <string, IList <object> >, UserStatistic>(userStatistics, data =>
{
if (!data.ContainsKey("User") || data["User"].Count != 1)
{
return(null);
}
return(new UserStatistic
{
User = (User)data["User"].Single(),
QuestionsCount = data.ContainsKey("Questions") ? data["Questions"].Count : 0,
AnswerCount = data.ContainsKey("Answers") ? data["Answers"].Count : 0
});
});
statMapper.Subscribe(new CallbackSubcriber <UserStatistic>(s => s?.ToString()));
}
