/// <summary>
/// Creates new instance of Workspace type
/// </summary>
internal Workspace(Guid snapshotId, TimeSpan timeout, INodeProvider <Guid, object, EdgeData> nodeProvider, IWorkspaceFacade commitTarget, ProxyCreatorService proxyCreatorService, TypesService typesService, IsolationLevel isolationLevel, IProxyMap immutableProxyMap)
{
this.workspaceId = Guid.NewGuid();
this.thread = Thread.CurrentThread;
if (!typeof(TDataType).IsInterface)
{
throw new ArgumentException("Interface type expected: " + typeof(TDataType).AssemblyQualifiedName);
}
this.snapshotId = snapshotId;
this.nodeProvider = nodeProvider;
this.proxyCreatorService = proxyCreatorService;
this.typesService = typesService;
this.isolationLevel = isolationLevel;
this.workspaceFacade = commitTarget;
this.immutableProxyMap = immutableProxyMap;
workspaceFacade.OpenWorkspace(workspaceId, snapshotId, isolationLevel, timeout);
if (isolationLevel == IsolationLevel.ReadOnly)
{
// Rely directly on parent provider if read only
this.objectInstancesService = new ObjectInstancesService(nodeProvider, typesService);
this.immutableInstancesService = new ObjectInstancesService(nodeProvider, typesService);
this.collectionInstancesService = new CollectionInstancesService(nodeProvider, typesService);
this.dictionaryInstancesService = new DictionaryInstancesService(nodeProvider, typesService);
}
else
{
// Construct isolated provider for local changes
var isolatedStorage = new DirectNodeProviderUnsafe <Guid, object, EdgeData>(new MemoryStorageUnsafe <Guid, object>(), false);
isolatedProvider = new IsolatedNodeProvider(nodeProvider, isolatedStorage, thread);
this.objectInstancesService = new ObjectInstancesService(isolatedProvider, typesService);
this.immutableInstancesService = new ObjectInstancesService(nodeProvider, typesService);
this.collectionInstancesService = new CollectionInstancesService(isolatedProvider, typesService);
this.dictionaryInstancesService = new DictionaryInstancesService(isolatedProvider, typesService);
}
this.runtimeProxyFacade = new RuntimeProxyFacade(typesService, objectInstancesService, immutableInstancesService, collectionInstancesService, new CollectionInstancesService(nodeProvider, typesService), dictionaryInstancesService, new DictionaryInstancesService(nodeProvider, typesService), mutableProxyMap, immutableProxyMap, proxyCreatorService);
// Initialize root data proxy
var rootObjectId = commitTarget.GetRootObjectId(snapshotId);
rootProxy = proxyCreatorService.NewObject <TDataType>(runtimeProxyFacade, rootObjectId, isolationLevel == IsolationLevel.ReadOnly);
if (isolationLevel == IsolationLevel.ReadOnly)
{
immutableProxyMap.AddProxy(rootObjectId, rootProxy);
}
else
{
mutableProxyMap.AddProxy(rootObjectId, rootProxy);
}
}
/// <summary>
/// Creates object from given revision ID returning the last commited state.
/// This method is not usable on new uncommited objects, because they dont have commited state.
/// Returned object is read only.
/// </summary>
/// <typeparam name="T">Type of object instance expected</typeparam>
/// <param name="revisionId">Revision ID to create</param>
/// <returns>Entity object instance</returns>
public T SpawnImmutable <T>(Guid revisionId)
{
if (isolatedProvider.GetNodeState(revisionId) == NodeState.Created)
{
throw new ArgumentException("Operation not allowed for uncommited instance");
}
object proxy = null;
if (!immutableProxyMap.TryGetProxy(revisionId, out proxy))
{
proxy = proxyCreatorService.NewObject <T>(runtimeProxyFacade, revisionId, true);
immutableProxyMap.AddProxy(revisionId, proxy);
}
return((T)proxy);
}
private object GetProxyInstance(bool isReadOnly, Guid referenceId, Guid typeId)
{
if (referenceId.Equals(Constants.NullReferenceNodeId))
{
return(null);
}
else
{
object proxy = null;
IProxyMap map = mutableProxyMap;
var collectionService = collectionInstancesService;
var objectService = objectInstancesService;
if (isReadOnly)
{
map = immutableProxyMap;
collectionService = immutableCollectionInstancesService;
objectService = immutableInstancesService;
}
if (!map.TryGetProxy(referenceId, out proxy))
{
if (typeId.Equals(Guid.Empty))
{
if (collectionService.IsCollectionInstance(referenceId)) // TODO (nsabo) Merge this information into proxy static data
{
typeId = collectionService.GetInstanceTypeId(referenceId);
}
else
{
// Get type ID of referenced instance
typeId = objectService.GetInstanceTypeId(referenceId);
}
}
// Create proxy object
proxy = proxyCreatorService.NewObject(this, typeId, referenceId, isReadOnly);
// Add to proxy map
map.AddProxy(referenceId, proxy);
}
return(proxy);
}
}
