private ObjectRepresentation CreateChildObjectRepresentation(object item, object parent = null, Action removeAction = null,
Func <object, object, object> getterFunc = null)
{
if (EntityExistsInRepository(item))
{
var objectRepresentation = _data.SingleOrDefault(x => x.Entity == item);
if (!objectRepresentation.Parents.ContainsKey(parent))
{
objectRepresentation.Parents.Add(parent, new Accessor(removeAction, getterFunc));
}
return(objectRepresentation);
}
else
{
var objectRepresentation = new ObjectRepresentation
{
Entity = item,
Parents = new Dictionary <object, Accessor> {
{ parent, new Accessor(removeAction, getterFunc) }
}
};
_data.Add(objectRepresentation);
objectRepresentation.RelatedEntities = AddRelatedObjects(item);
return(objectRepresentation);
}
}
private void UpdateExistingRepresentations(ObjectRepresentation rep)
{
var type = rep.Entity.GetType();
var nonPrimitivePropertiesFromObject = type.GetProperties().Where(x => !x.PropertyType.GetTypeInfo().IsPrimitive).ToList();
var typesCurrentlyStored = rep.RelatedEntities.Select(x => x.Entity.GetType()).ToList();
List <object> referencedProperties = new List <object>();
foreach (var info in nonPrimitivePropertiesFromObject)
{
if (typesCurrentlyStored.Contains(info.PropertyType.ToSingleType()))
{
if (info.PropertyType.IsEnumerable())
{
IEnumerable values = (IEnumerable)info.GetValue(rep.Entity, null);
referencedProperties.AddRange(values.Cast <object>());
}
else
{
referencedProperties.Add(info.GetValue(rep.Entity, null));
}
}
}
foreach (var data in rep.RelatedEntities.Where(x => typesCurrentlyStored.Contains(x.Entity.GetType())))
{
if (!referencedProperties.Contains(data.Entity))
{
continue;
}
var collectionType = typeof(ICollection <>).MakeGenericType(type);
var propertiesThatReferToRepresentation =
data.Entity.GetType()
.GetProperties()
.Where(x => x.PropertyType == type || x.PropertyType.IsAssignableFrom(collectionType));
var addMethod = collectionType.GetMethod("Add");
var propertyInfos = propertiesThatReferToRepresentation.ToList();
if (!propertyInfos.Any() || propertyInfos.Count() > 1)
{
return;
}
var referencingProperty = propertyInfos.Single();
if (referencingProperty.PropertyType.IsAssignableFrom(collectionType))
{
var collection = referencingProperty.GetValue(data.Entity, null);
if (collection == null)
{
var listType = typeof(List <>).MakeGenericType(type);
referencingProperty.SetValue(data.Entity, Activator.CreateInstance(listType), null);
collection = referencingProperty.GetValue(data.Entity, null);
}
addMethod.Invoke(collection, new[] { rep.Entity });
}
else
{
referencingProperty.SetValue(data.Entity, rep.Entity, null);
}
}
}
internal void Add <T>(T item) where T : class
{
if (EntityExistsInRepository(item))
{
return;
}
var rep = new ObjectRepresentation
{
Entity = item
};
_data.Add(rep);
rep.RelatedEntities = AddRelatedObjects(item);
UpdateExistingRepresentations(rep);
}
private IEnumerable <ObjectRepresentation> GetSingularRelationships <T>(T item)
{
List <ObjectRepresentation> reps = new List <ObjectRepresentation>();
var properties =
item.GetType()
.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.PropertyType.GetTypeInfo().IsClass &&
!typeof(IEnumerable).IsAssignableFrom(x.PropertyType) &&
x.GetValue(item, null) != null);
foreach (var propertyInfo in properties)
{
var child = propertyInfo.GetValue(item, null);
Func <object, object, object> getterFunc = (parent, kid) => propertyInfo.GetValue(parent, null);
Action removeAction = () => propertyInfo.SetValue(item, null, null);
ObjectRepresentation childTypeRepresentation = CreateChildObjectRepresentation(child, item, removeAction, getterFunc);
reps.Add(childTypeRepresentation);
}
return(reps);
}
private IEnumerable <ObjectRepresentation> GetMultipleRelationships <T>(T item)
{
List <ObjectRepresentation> reps = new List <ObjectRepresentation>();
var properties =
item.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.PropertyType != typeof(string) &&
typeof(IEnumerable).IsAssignableFrom(x.PropertyType) &&
x.GetValue(item, null) != null);
foreach (var propertyInfo in properties)
{
var childCollection = (IEnumerable)propertyInfo.GetValue(item, null);
foreach (var child in childCollection)
{
var removeAction = CreateRemoveFromCollectionAction(propertyInfo, item, child);
var getterFunc = CreateGetterFromCollectionFunc(propertyInfo, child);
ObjectRepresentation childTypeRepresentation = CreateChildObjectRepresentation(child, item, removeAction, getterFunc);
reps.Add(childTypeRepresentation);
}
}
return(reps);
}