/// <summary>
/// Loads the snapshot package.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
public string LoadSnapshotPackage(LoadPackageContext context)
{
var result = string.Empty;
try
{
using (var snapshotObjectSpace = new ObjectSpace(context.Package.UnitOfWork))
{
// create root context
var sourceMaps = snapshotObjectSpace.GetObjects <SnapshotOidMap>();
var rootContext = new SnapshotLoadContext(context, sourceMaps);
context.Worker.ReportProgress(string.Format(Localizer.ObjectsFoundInSnapshot, sourceMaps.Count));
// restore all of object from snapshot
foreach (var sourceMap in sourceMaps)
{
loadSnapshotObject(rootContext, sourceMap);
}
// fix OidMap references
var newMaps = from c in context.ObjectSpace.ModifiedObjects.Cast <object>()
where c is OidMap && ((OidMap)c).NewObject != null
select c as OidMap;
context.ObjectSpace.CommitChanges();
newMaps.ToList().ForEach(x => x.FixReference());
snapshotPostLoad(context.ObjectSpace);
restoreLastLoadedNum(context, snapshotObjectSpace);
context.ObjectSpace.CommitChanges();
snapshotObjectSpace.Rollback();
}
}
catch (Exception exception)
{
result = string.Format(Localizer.SnapshotLoadingIsFailed, exception.Message);
context.Worker.ReportError(result);
}
if (string.IsNullOrEmpty(result))
{
if (context.Worker.CancellationPending)
{
result = Localizer.LoadingAborted;
}
context.Worker.ReportProgress(Color.Blue, Localizer.SnapshotLoadingIs,
(context.Worker.CancellationPending ? Localizer.Aborted : Localizer.Finished));
}
return(result);
}
/// <summary>
/// Loads the snapshot object.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="sourceMap">The source map.</param>
/// <returns></returns>
private object loadSnapshotObject(SnapshotLoadContext context, SnapshotOidMap sourceMap)
{
// look for existing object in app database
var result = OidMap.FindApplicationObject(context.ObjectSpace, sourceMap, context.Package.SenderNodeId);
// if not found then create new one
if (result == null)
{
var typeInfo = context.ObjectSpace.TypesInfo.FindTypeInfo(sourceMap.Target.Target.GetType());
result = context.ObjectSpace.CreateObject(typeInfo.Type);
}
// register mapping
updateObjectMapping(context, sourceMap, result);
// restore object's state from snapshot
restoreSnapshotObjectState(context, (IXPObject)sourceMap.Target.Target, (IXPObject)result);
return(result);
}
/// <summary>
/// Updates the object mapping.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="sourceMap">The source map.</param>
/// <param name="appObject">The app object.</param>
private void updateObjectMapping(SnapshotLoadContext context,
IPackageObjectReference sourceMap, object appObject)
{
if (context.UpdatedMapping.Contains(appObject))
{
return;
}
context.UpdatedMapping.Add(appObject);
foreach (var mappingStr in sourceMap.KnownMapping.Split(new[] { '\n' },
StringSplitOptions.RemoveEmptyEntries))
{
var mapArray = mappingStr.Split('\a');
var nodeId = mapArray[0];
var objectId = mapArray[1];
var oidMap = OidMap.GetOidMap(appObject, nodeId);
if (oidMap == null)
{
OidMap.CreateOidMap(context.ObjectSpace, objectId, nodeId, (IXPObject)appObject);
}
}
}
/// <summary>
/// Restores the state of the snapshot object.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="snapshotObject">The snapshot object.</param>
/// <param name="appObject">The app object.</param>
private void restoreSnapshotObjectState(SnapshotLoadContext context, IXPObject snapshotObject, IXPObject appObject)
{
if (context.RestoredObjects.Contains(snapshotObject))
{
return;
}
context.RestoredObjects.Add(snapshotObject);
var snapClassInfo = snapshotObject.ClassInfo;
var modelClass = XafDeltaModule.XafApp.FindModelClass(snapClassInfo.ClassType);
// restore non collection properties
foreach (var snapMemberInfo in snapClassInfo.Members.Where(x => x.IsPersistent &&
!x.IsReadOnly && !(x is ServiceField) && !x.IsKey))
{
// skip non snapshot members
if (modelClass != null)
{
var modelMember = modelClass.FindMember(snapMemberInfo.Name);
if (modelMember != null && modelMember.NonSnapshot())
{
continue;
}
}
var appMemberInfo = appObject.ClassInfo.GetMember(snapMemberInfo.Name);
// skip unknown and readonly properties
if (appMemberInfo == null || appMemberInfo.IsReadOnly)
{
continue;
}
// new value grom snapshot
var snapValue = snapMemberInfo.GetValue(snapshotObject);
var memberIsRestored = false;
// XPO references
if (snapMemberInfo.ReferenceType != null)
{
// aggregated objects
if (snapMemberInfo.IsAggregated && snapValue != null)
{
// app current aggregate value
var aggrObj = appMemberInfo.GetValue(appObject);
// if aggregated object in app is not null
// then link it to snapshot object and restore state
if (aggrObj != null)
{
updateObjectMapping(context, context.Maps[snapValue], aggrObj);
restoreSnapshotObjectState(context, (IXPObject)snapValue, (IXPObject)aggrObj);
memberIsRestored = true;
}
}
if (snapValue != null && !memberIsRestored)
{
var snapOidMap = context.Maps[snapValue];
appMemberInfo.SetValue(appObject, loadSnapshotObject(context, snapOidMap));
memberIsRestored = true;
}
}
if (!memberIsRestored)
{
appMemberInfo.SetValue(appObject, snapValue);
}
}
// restore collections state
foreach (var snapMemberInfo in snapClassInfo.Members.Where(x => !x.Name.EndsWith("__Links") &&
(x.IsManyToMany || x.IsManyToManyAlias || x.IsCollection || x.IsAssociationList)))
{
// skip non snapshot members
if (modelClass != null)
{
var modelMember = modelClass.FindMember(snapMemberInfo.Name);
if (modelMember != null && modelMember.MemberInfo.FindAttribute <NonSnapshotAttribute>() != null)
{
continue;
}
}
var snapCollection = snapMemberInfo.GetValue(snapshotObject) as IList;
var appMemberInfo = appObject.ClassInfo.GetMember(snapMemberInfo.Name);
var appCollection = appMemberInfo.GetValue(appObject) as IList;
if (snapCollection != null && appCollection != null)
{
foreach (var snapElement in snapCollection)
{
if (context.Maps.ContainsKey(snapElement))
{
var appElement = loadSnapshotObject(context, context.Maps[snapElement]);
if (!appCollection.Contains(appElement))
{
appCollection.Add(appElement);
}
}
}
}
}
}
/// <summary>
/// Updates the object mapping.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="sourceMap">The source map.</param>
/// <param name="appObject">The app object.</param>
private void updateObjectMapping(SnapshotLoadContext context,
IPackageObjectReference sourceMap, object appObject)
{
if(context.UpdatedMapping.Contains(appObject)) return;
context.UpdatedMapping.Add(appObject);
foreach (var mappingStr in sourceMap.KnownMapping.Split(new[]{'\n'},
StringSplitOptions.RemoveEmptyEntries))
{
var mapArray = mappingStr.Split('\a');
var nodeId = mapArray[0];
var objectId = mapArray[1];
var oidMap = OidMap.GetOidMap(appObject, nodeId);
if(oidMap == null)
OidMap.CreateOidMap(context.ObjectSpace, objectId, nodeId, (IXPObject)appObject);
}
}
/// <summary>
/// Restores the state of the snapshot object.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="snapshotObject">The snapshot object.</param>
/// <param name="appObject">The app object.</param>
private void restoreSnapshotObjectState(SnapshotLoadContext context, IXPObject snapshotObject, IXPObject appObject)
{
if(context.RestoredObjects.Contains(snapshotObject)) return;
context.RestoredObjects.Add(snapshotObject);
var snapClassInfo = snapshotObject.ClassInfo;
var modelClass = XafDeltaModule.XafApp.FindModelClass(snapClassInfo.ClassType);
// restore non collection properties
foreach (var snapMemberInfo in snapClassInfo.Members.Where(x => x.IsPersistent
&& !x.IsReadOnly && !(x is ServiceField) && !x.IsKey))
{
// skip non snapshot members
if(modelClass != null)
{
var modelMember = modelClass.FindMember(snapMemberInfo.Name);
if (modelMember != null && modelMember.NonSnapshot())
continue;
}
var appMemberInfo = appObject.ClassInfo.GetMember(snapMemberInfo.Name);
// skip unknown and readonly properties
if(appMemberInfo == null || appMemberInfo.IsReadOnly) continue;
// new value grom snapshot
var snapValue = snapMemberInfo.GetValue(snapshotObject);
var memberIsRestored = false;
// XPO references
if (snapMemberInfo.ReferenceType != null)
{
// aggregated objects
if (snapMemberInfo.IsAggregated && snapValue != null)
{
// app current aggregate value
var aggrObj = appMemberInfo.GetValue(appObject);
// if aggregated object in app is not null
// then link it to snapshot object and restore state
if (aggrObj != null)
{
updateObjectMapping(context, context.Maps[snapValue], aggrObj);
restoreSnapshotObjectState(context, (IXPObject)snapValue, (IXPObject)aggrObj);
memberIsRestored = true;
}
}
if (snapValue != null && !memberIsRestored)
{
var snapOidMap = context.Maps[snapValue];
appMemberInfo.SetValue(appObject, loadSnapshotObject(context, snapOidMap));
memberIsRestored = true;
}
}
if (!memberIsRestored)
appMemberInfo.SetValue(appObject, snapValue);
}
// restore collections state
foreach (var snapMemberInfo in snapClassInfo.Members.Where(x => !x.Name.EndsWith("__Links")
&& (x.IsManyToMany || x.IsManyToManyAlias || x.IsCollection || x.IsAssociationList)))
{
// skip non snapshot members
if (modelClass != null)
{
var modelMember = modelClass.FindMember(snapMemberInfo.Name);
if (modelMember != null && modelMember.MemberInfo.FindAttribute<NonSnapshotAttribute>() != null)
continue;
}
var snapCollection = snapMemberInfo.GetValue(snapshotObject) as IList;
var appMemberInfo = appObject.ClassInfo.GetMember(snapMemberInfo.Name);
var appCollection = appMemberInfo.GetValue(appObject) as IList;
if (snapCollection != null && appCollection != null)
foreach (var snapElement in snapCollection)
{
if (context.Maps.ContainsKey(snapElement))
{
var appElement = loadSnapshotObject(context, context.Maps[snapElement]);
if (!appCollection.Contains(appElement))
appCollection.Add(appElement);
}
}
}
}
/// <summary>
/// Loads the snapshot object.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="sourceMap">The source map.</param>
/// <returns></returns>
private object loadSnapshotObject(SnapshotLoadContext context, SnapshotOidMap sourceMap)
{
// look for existing object in app database
var result = OidMap.FindApplicationObject(context.ObjectSpace, sourceMap, context.Package.SenderNodeId);
// if not found then create new one
if(result == null)
{
var typeInfo = context.ObjectSpace.TypesInfo.FindTypeInfo(sourceMap.Target.Target.GetType());
result = context.ObjectSpace.CreateObject(typeInfo.Type);
}
// register mapping
updateObjectMapping(context, sourceMap, result);
// restore object's state from snapshot
restoreSnapshotObjectState(context, (IXPObject)sourceMap.Target.Target, (IXPObject)result);
return result;
}
/// <summary>
/// Loads the snapshot package.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
public string LoadSnapshotPackage(LoadPackageContext context)
{
var result = string.Empty;
try
{
using (var snapshotObjectSpace = new ObjectSpace(context.Package.UnitOfWork))
{
// create root context
var sourceMaps = snapshotObjectSpace.GetObjects<SnapshotOidMap>();
var rootContext = new SnapshotLoadContext(context, sourceMaps);
context.Worker.ReportProgress(string.Format(Localizer.ObjectsFoundInSnapshot, sourceMaps.Count));
// restore all of object from snapshot
foreach (var sourceMap in sourceMaps)
loadSnapshotObject(rootContext, sourceMap);
// fix OidMap references
var newMaps = from c in context.ObjectSpace.ModifiedObjects.Cast<object>()
where c is OidMap && ((OidMap)c).NewObject != null
select c as OidMap;
context.ObjectSpace.CommitChanges();
newMaps.ToList().ForEach(x => x.FixReference());
snapshotPostLoad(context.ObjectSpace);
restoreLastLoadedNum(context, snapshotObjectSpace);
context.ObjectSpace.CommitChanges();
snapshotObjectSpace.Rollback();
}
}
catch (Exception exception)
{
result = string.Format(Localizer.SnapshotLoadingIsFailed, exception.Message);
context.Worker.ReportError( result);
}
if (string.IsNullOrEmpty(result))
{
if (context.Worker.CancellationPending)
result = Localizer.LoadingAborted;
context.Worker.ReportProgress(Color.Blue, Localizer.SnapshotLoadingIs,
(context.Worker.CancellationPending ? Localizer.Aborted : Localizer.Finished));
}
return result;
}
