Refactor how the storage is used.

This is the initial refactoring to improve how we deal with the storage.

It does a couple of things:
* Rename Sink::Storage to Sink::Storage::DataStore to free up the
  Sink::Storage namespace
* Introduce a Sink::ResourceContext to have a single object that can be
  passed around containing everything that is necessary to operate on a
  resource. This is a lot better than the multiple separate parameters
  that we used to pass around all over the place, while still allowing
  for dependency injection for tests.
* Tie storage access together using the new EntityStore that directly
  works with ApplicationDomainTypes. This gives us a central place where
  main storage, indexes and buffer adaptors are tied together, which
  will also give us a place to implement external indexes, such as a
  fulltextindex using xapian.
* Use ApplicationDomainTypes as the default way to pass around entities.
  Instead of using various ways to pass around entities (buffers,
  buffer adaptors, ApplicationDomainTypes), only use a single way.
  The old approach was confusing, and was only done as:
  * optimization; really shouldn't be necessary and otherwise I'm sure
  we can find better ways to optimize ApplicationDomainType itself.
  * a way to account for entities that have multiple buffers, a concept
  that I no longer deem relevant.

While this commit does the bulk of the work to get there, the following
commits will refactor more stuff to get things back to normal.

1 files changed, 5 insertions, 4 deletions

diff --git a/common/datastorequery.h b/common/datastorequery.h
index 164d721..4cf25b2 100644
--- a/common/datastorequery.h
+++ b/common/datastorequery.h
@@ -25,6 +25,7 @@
 #include "query.h"
 #include "entitybuffer.h"
 #include "log.h"
+#include "storage/entitystore.h"
 
 
 class Source;
@@ -35,11 +36,11 @@ class DataStoreQuery {
 public:
     typedef QSharedPointer<DataStoreQuery> Ptr;
 
-    DataStoreQuery(const Sink::Query &query, const QByteArray &type, Sink::Storage::Transaction &transaction, TypeIndex &typeIndex, std::function<QVariant(const Sink::Entity &entity, const QByteArray &property)> getProperty);
+    DataStoreQuery(const Sink::Query &query, const QByteArray &type, Sink::Storage::EntityStore::Ptr store, TypeIndex &typeIndex, std::function<QVariant(const Sink::Entity &entity, const QByteArray &property)> getProperty);
     ResultSet execute();
     ResultSet update(qint64 baseRevision);
 
-protected:
+private:
 
     typedef std::function<bool(const QByteArray &uid, const Sink::EntityBuffer &entityBuffer)> FilterFunction;
     typedef std::function<void(const QByteArray &uid, const Sink::EntityBuffer &entityBuffer)> BufferCallback;
@@ -56,15 +57,15 @@ protected:
     QByteArrayList executeSubquery(const Sink::Query &subquery);
 
     Sink::Query mQuery;
-    Sink::Storage::Transaction &mTransaction;
     const QByteArray mType;
     TypeIndex &mTypeIndex;
-    Sink::Storage::NamedDatabase mDb;
     std::function<QVariant(const Sink::Entity &entity, const QByteArray &property)> mGetProperty;
     bool mInitialQuery;
     QSharedPointer<FilterBase> mCollector;
     QSharedPointer<Source> mSource;
 
+    QSharedPointer<Sink::Storage::EntityStore> mStore;
+
     SINK_DEBUG_COMPONENT(mType)
 };