public List <ConnectionEdge> HandleConnectionEdges <TSource>(TSource item, Action <object> entityAction)
{
var internalConnectionEdgeState = new InternalConnectionEdgeState(entityAction);
var connectionEdges = new List <ConnectionEdge>();
var srcType = item.GetType();
var srcTypeAccessor = TypeAccessor.Create(srcType);
var id = srcTypeAccessor.GetKey(item);
DiscoverConnectionEdges(id, item, connectionEdges, internalConnectionEdgeState, entityAction);
internalConnectionEdgeState.InvokeAction(item, id, srcType.Name);
return(connectionEdges);
}
private void DiscoverConnectionEdges(
string sourceId,
object instance,
List <ConnectionEdge> connectionEdges,
InternalConnectionEdgeState internalConnectionEdgeState, Action <object> entityAction)
{
Type sourceType = instance.GetType();
var sourceTypeAccessor = TypeAccessor.Create(sourceType);
foreach (var member in sourceTypeAccessor.GetMembers())
{
if (GetConnectionAttribute(member) != null)
{
var value = sourceTypeAccessor[instance, member.Name];
if (value != null)
{
if (member.IsList())
{
var argType = member.Type.GetGenericArguments()[0];
foreach (var itemValue in (IList)value)
{
HandleConnectionEdge(sourceId, sourceType,
argType,
member.Name, itemValue, connectionEdges,
internalConnectionEdgeState, entityAction, true);
}
}
else
{
HandleConnectionEdge(sourceId, sourceType,
member.Type, member.Name, value, connectionEdges,
internalConnectionEdgeState, entityAction, false);
}
sourceTypeAccessor[instance, member.Name] = null;
}
}
}
}
private void DiscoverConnectionEdges(
TypeAccessor sourceTypeAccessor,
string sourceId,
Type sourceType,
object instance,
List <ConnectionEdge> connectionEdges,
InternalConnectionEdgeState internalConnectionEdgeState)
{
foreach (var member in sourceTypeAccessor.GetMembers())
{
ConnectionAttribute connAttribute = member.GetAttribute(typeof(ConnectionAttribute), true) as ConnectionAttribute;
if (connAttribute != null)
{
var value = sourceTypeAccessor[instance, member.Name];
if (value != null)
{
HandleConnectionEdge(sourceId, sourceType, connAttribute, member, value, connectionEdges, internalConnectionEdgeState);
sourceTypeAccessor[instance, member.Name] = null;
}
}
}
}
private void HandleConnectionEdge(
string sourceId,
Type sourceType,
Type edgeType,
string sourceFieldName,
object edgeObjectInstance,
List <ConnectionEdge> connectionEdges,
InternalConnectionEdgeState internalConnectionEdgeState,
Action <object> entityAction,
bool isListEdge)
{
var edgeTypeAccessor = TypeAccessor.Create(edgeType);
var connectionEdge = new ConnectionEdge
{
SourceType = sourceType.AssemblyQualifiedName,
SourceFieldName = sourceFieldName,
SourceId = sourceId,
MetaType = edgeType.AssemblyQualifiedName
};
Member destinationId = null;
Member destinationModel = null;
foreach (var edgeMember in edgeTypeAccessor.GetMembers())
{
var connectionEdgeDestinationKey = edgeMember.GetAttribute(typeof(ConnectionEdgeDestinationKeyAttribute),
false) as ConnectionEdgeDestinationKeyAttribute;
if (connectionEdgeDestinationKey != null)
{
destinationId = edgeMember;
}
else
{
var connectionEdgeDestination = edgeMember.GetAttribute(typeof(ConnectionEdgeDestinationAttribute),
false) as ConnectionEdgeDestinationAttribute;
if (connectionEdgeDestination != null)
{
destinationModel = edgeMember;
}
}
}
if (destinationId == null)
{
throw new InvalidProgramException("Property with ConnectionEdgeDestinationKeyAttribute is required on a Connection.");
}
if (destinationModel == null)
{
throw new InvalidProgramException("Property with ConnectionEdgeDestinationAttribute is required on a Connection.");
}
var destId = edgeTypeAccessor[edgeObjectInstance, destinationId.Name];
if (destId == null)
{
throw new InvalidProgramException("Value on property with ConnectionEdgeDestinationKeyAttribute is required!");
}
// Eval destination model instance first.
var destObject = edgeTypeAccessor[edgeObjectInstance, destinationModel.Name];
if (destObject != null)
{
var id = destId.ToString();
DiscoverConnectionEdges(id, destObject, connectionEdges, internalConnectionEdgeState, entityAction);
internalConnectionEdgeState.InvokeAction(destObject, id, destinationModel.Type.Name);
edgeTypeAccessor[edgeObjectInstance, destinationModel.Name] = null;
}
connectionEdge.DestinationId = destId.ToString();
connectionEdge.Id = isListEdge ?
$"{connectionEdge.SourceFieldName}_src{connectionEdge.SourceId}_des{connectionEdge.DestinationId}" :
$"{connectionEdge.SourceFieldName}_{connectionEdge.SourceId}";
connectionEdge.MetaFieldName = destinationModel.Name;
connectionEdge.MetaValue = JsonConvert.SerializeObject(edgeObjectInstance);
connectionEdges.Add(connectionEdge);
}