public ObjectStateInfo GetObjectState(object value)
{
Guard.EnsureIsNotNull("value", value);
var type = value.GetType();
var state = ExtractStateInfo(value, type);
var stateInfo = new ObjectStateInfo
{
ObjectType = type
};
AssignObjectState(value, state, stateInfo, false);
AssignChildObjectStates(value, state, stateInfo.ChildInfos);
return stateInfo;
}
private void AssignChildObjectStates(object parent, InitialObjectState state, IList<ObjectStateInfo> childStateInfos)
{
if (childStateInfos.IsNull())
{
childStateInfos = new List<ObjectStateInfo>();
}
foreach (var childState in state.ChildObjectStates)
{
var childStateInfo = new ObjectStateInfo
{
ObjectType = childState.ObjectType,
PropertyName = childState.PropertyName
};
AssignObjectState(parent, childState, childStateInfo, true);
AssignChildState(childState, childStateInfo);
childStateInfos.Add(childStateInfo);
}
}
private void AssignObjectState(object item, InitialObjectState state, ObjectStateInfo stateInfo, bool isChild)
{
var value = GetValue(item, state, isChild);
if (!InitialObjectStates.ContainsKey(state.Id))
{
stateInfo.ObjectState = ObjectState.New;
return;
}
var stateAsParent = InitialObjectStates[state.Id];
var stateAsChild = isChild ? GetChildInitialState(item, value) : null;
if (stateAsParent.IsDeleted || (isChild && stateAsChild.IsNotNull() && stateAsChild.IsDeleted))
{
stateInfo.ObjectState = ObjectState.Deleted;
return;
}
var hash = _hashHelper.GenerateHash(value);
if (String.Compare(stateAsParent.HashCode, hash, StringComparison.InvariantCulture) != 0)
{
stateInfo.ObjectState = ObjectState.Updated;
return;
}
stateInfo.ObjectState = ObjectState.NoChange;
return;
}
private void AssignChildState(InitialObjectState childObjectState, ObjectStateInfo childStateInfo)
{
var foundAsParent = InitialObjectStates.ContainsKey(childObjectState.Id);
var attachedToParent = false;
if (InitialObjectStates.ContainsKey(childObjectState.ParentId))
{
var parentState = InitialObjectStates[childObjectState.ParentId];
attachedToParent = parentState.ChildObjectStates
.Any(child => child.Id == childObjectState.Id);
}
var childState = AssignChildStateInternal(foundAsParent, attachedToParent);
childStateInfo.ChildState = childState;
}
