private object GetNavObject(object entity, FieldNavigationList fieldList)
{
var accessor = GetTypeAccessor(entity.GetType());
var parent = entity;
var fieldCount = fieldList.Fields.Count();
object child = null;
//Start at field 1 as 0 is the entity itself
for (int i = 1; i < fieldCount; i++)
{
if (child != null)
{
parent = child;
}
child = accessor[parent, fieldList.Fields[i]];
if (child == null)
{
break;
}
accessor = GetTypeAccessor(child.GetType());
}
return(child);
}
private object ProcessField(object entity, List <FieldNavigationList> fieldLists)
{
//Start with least specific so we don't overwrite things
fieldLists = fieldLists.OrderBy(x => x.Fields.Count).ToList();
//Get type accessor for root object/collection
var entityType = entity.GetType();
var rootTypeAccessor = GetTypeAccessor(entity.GetType());
var newEntity = ShallowClone(entity);
//Loop through field lists
foreach (var fieldList in fieldLists)
{
//Plan here is to build object structure from the deepest level up
var fieldDepthCount = fieldList.Fields.Count();
FieldNavigationList currentFieldList = fieldList;
object parentObject = null;
object childObject = null;
switch (fieldDepthCount)
{
case 1:
//Nothing to do here as newEntity is already a shallow clone of entity
break;
default:
for (int i = (fieldDepthCount - 1); i >= 0; i--)
{
//As we loop through we lop off the end field to go down through the graph
currentFieldList = new FieldNavigationList {
Fields = fieldList.Fields.GetRange(0, i + 1)
};
//Get object - use GetNavObject if we're not at the root
if (i > 0)
{
parentObject = GetNavObject(entity, currentFieldList);
parentObject = ShallowClone(parentObject);
}
//We're at root so use our new entity that we will return
else
{
parentObject = newEntity;
}
//If we have a child then attach it to parent
if (childObject != null)
{
var parentAccessor = GetTypeAccessor(parentObject.GetType());
parentAccessor[parentObject, fieldList.Fields[i + 1]] = childObject;
}
//Keep ref to add and add it to next one
childObject = parentObject;
}
break;
}
}
return(newEntity);
}
