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#pragma once
#include <QList>
#include <functional>
#include <QSharedPointer>
#include <QEventLoop>
#include "resultprovider.h"
namespace async {
/*
* A result set specialization that provides a syncronous list.
*
* Only for testing purposes.
*
* WARNING: The nested eventloop can cause all sorts of trouble. Use only in testing code.
*/
template<class T>
class SyncListResult : public QList<T> {
public:
SyncListResult(const QSharedPointer<Akonadi2::ResultEmitter<T> > &emitter)
:QList<T>(),
mEmitter(emitter)
{
emitter->onAdded([this](const T &value) {
this->append(value);
});
emitter->onInitialResultSetComplete([this]() {
if (eventLoopAborter) {
eventLoopAborter();
//Be safe in case of a second invocation of the complete handler
eventLoopAborter = std::function<void()>();
}
});
emitter->onComplete([this]() {
mEmitter.clear();
});
emitter->onClear([this]() {
this->clear();
});
}
void exec()
{
QEventLoop eventLoop;
eventLoopAborter = [&eventLoop]() { eventLoop.quit(); };
eventLoop.exec();
}
private:
QSharedPointer<Akonadi2::ResultEmitter<T> > mEmitter;
std::function<void()> eventLoopAborter;
};
}
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