public static void Expand <IParentEntity, IUniqueEntity>(IModel model, Func <IParentEntity, ICollection <IUniqueEntity> > accessor) where IParentEntity : IPersistEntity where IUniqueEntity : IPersistEntity
{
//get duplicates in one go to avoid exponential search
var candidates = new Dictionary <IUniqueEntity, List <IParentEntity> >();
foreach (var entity in model.Instances.OfType <IParentEntity>())
{
foreach (var val in accessor(entity))
{
List <IParentEntity> assets;
if (!candidates.TryGetValue(val, out assets))
{
assets = new List <IParentEntity>();
candidates.Add(val, assets);
}
assets.Add(entity);
}
}
var multi = candidates.Where(a => a.Value.Count > 1);
var map = new XbimInstanceHandleMap(model, model);
foreach (var kvp in multi)
{
var value = kvp.Key;
var entities = kvp.Value;
//skip the first
for (int i = 1; i < entities.Count; i++)
{
//clear map to create complete copy every time
map.Clear();
var copy = model.InsertCopy(value, map, null, false, false);
//remove original and add fresh copy
var entity = entities[i];
var collection = accessor(entity);
collection.Remove(value);
collection.Add(copy);
}
}
}
/// <summary>
/// Inserts deep copy of an object into this model. The entity must originate from the same schema (the same EntityFactory).
/// This operation happens within a transaction which you have to handle yourself unless you set the parameter "noTransaction" to true.
/// Insert will happen outside of transactional behaviour in that case. Resulting model is not guaranteed to be valid according to any
/// model view definition. However, it is granted to be consistent. You can optionaly bring in all inverse relationships. Be carefull as it
/// might easily bring in almost full model.
///
/// </summary>
/// <typeparam name="T">Type of the copied entity</typeparam>
/// <param name="model">Model to be used as a target</param>
/// <param name="toCopy">Entity to be copied</param>
/// <param name="mappings">Mappings of previous inserts</param>
/// <param name="includeInverses">Option if to bring in all inverse entities (enumerations in original entity)</param>
/// <param name="keepLabels">Option if to keep entity labels the same</param>
/// <param name="propTransform">Optional delegate which you can use to filter the content which will get coppied over.</param>
/// <param name="getLabeledEntity">Functor to be used to create entity with specified label</param>
/// <returns>Copy from this model</returns>
public static T InsertCopy <T>(IModel model, T toCopy, XbimInstanceHandleMap mappings, PropertyTranformDelegate propTransform, bool includeInverses,
bool keepLabels, Func <Type, int, IPersistEntity> getLabeledEntity) where T : IPersistEntity
{
try
{
var toCopyLabel = toCopy.EntityLabel;
XbimInstanceHandle copyHandle;
var toCopyHandle = new XbimInstanceHandle(toCopy);
//try to get the value if it was created before
if (mappings.TryGetValue(toCopyHandle, out copyHandle))
{
return((T)copyHandle.GetEntity());
}
var expressType = model.Metadata.ExpressType(toCopy);
var copy = keepLabels ? getLabeledEntity(toCopy.GetType(), toCopyLabel) : model.Instances.New(toCopy.GetType());
copyHandle = new XbimInstanceHandle(copy);
//key is the label in original model
mappings.Add(toCopyHandle, copyHandle);
var props = expressType.Properties.Values.Where(p => !p.EntityAttribute.IsDerived);
if (includeInverses)
{
props = props.Union(expressType.Inverses);
}
foreach (var prop in props)
{
var value = propTransform != null
? propTransform(prop, toCopy)
: prop.PropertyInfo.GetValue(toCopy, null);
if (value == null)
{
continue;
}
var isInverse = (prop.EntityAttribute.Order == -1); //don't try and set the values for inverses
var theType = value.GetType();
//if it is an express type or a value type, set the value
if (theType.GetTypeInfo().IsValueType || typeof(ExpressType).GetTypeInfo().IsAssignableFrom(theType) ||
theType == typeof(string))
{
prop.PropertyInfo.SetValue(copy, value, null);
}
else if (!isInverse && typeof(IPersistEntity).GetTypeInfo().IsAssignableFrom(theType))
{
prop.PropertyInfo.SetValue(copy,
InsertCopy(model, (IPersistEntity)value, mappings, propTransform, includeInverses, keepLabels, getLabeledEntity), null);
}
else if (!isInverse && typeof(IList).GetTypeInfo().IsAssignableFrom(theType))
{
var itemType = theType.GetItemTypeFromGenericType();
var copyColl = prop.PropertyInfo.GetValue(copy, null) as IList;
if (copyColl == null)
{
throw new Exception(string.Format("Unexpected collection type ({0}) found", itemType.Name));
}
foreach (var item in (IList)value)
{
var actualItemType = item.GetType();
if (actualItemType.GetTypeInfo().IsValueType || typeof(ExpressType).GetTypeInfo().IsAssignableFrom(actualItemType))
{
copyColl.Add(item);
}
else if (typeof(IPersistEntity).GetTypeInfo().IsAssignableFrom(actualItemType))
{
var cpy = InsertCopy(model, (IPersistEntity)item, mappings, propTransform, includeInverses,
keepLabels, getLabeledEntity);
copyColl.Add(cpy);
}
else if (typeof(IList).GetTypeInfo().IsAssignableFrom(actualItemType)) //list of lists
{
var listColl = (IList)item;
var getAt = copyColl.GetType().GetTypeInfo().GetMethod("GetAt");
if (getAt == null)
{
throw new Exception(string.Format("GetAt Method not found on ({0}) found", copyColl.GetType().Name));
}
var copyListColl = getAt.Invoke(copyColl, new object[] { copyColl.Count }) as IList;
if (copyListColl == null)
{
throw new XbimException("Collection can't be used as IList");
}
foreach (var listItem in listColl)
{
var actualListItemType = listItem.GetType();
if (actualListItemType.GetTypeInfo().IsValueType ||
typeof(ExpressType).GetTypeInfo().IsAssignableFrom(actualListItemType))
{
copyListColl.Add(listItem);
}
else if (typeof(IPersistEntity).GetTypeInfo().IsAssignableFrom(actualListItemType))
{
var cpy = InsertCopy(model, (IPersistEntity)listItem, mappings, propTransform,
includeInverses,
keepLabels, getLabeledEntity);
copyListColl.Add(cpy);
}
else
{
throw new Exception(string.Format("Unexpected collection item type ({0}) found",
itemType.Name));
}
}
}
else
{
throw new Exception(string.Format("Unexpected collection item type ({0}) found",
itemType.Name));
}
}
}
else if (isInverse && value is IEnumerable <IPersistEntity> ) //just an enumeration of IPersistEntity
{
foreach (var ent in (IEnumerable <IPersistEntity>)value)
{
InsertCopy(model, ent, mappings, propTransform, includeInverses, keepLabels, getLabeledEntity);
}
}
else if (isInverse && value is IPersistEntity) //it is an inverse and has a single value
{
InsertCopy(model, (IPersistEntity)value, mappings, propTransform, includeInverses, keepLabels, getLabeledEntity);
}
else
{
throw new Exception(string.Format("Unexpected item type ({0}) found", theType.Name));
}
}
return((T)copy);
}
catch (Exception e)
{
throw new XbimException(string.Format("General failure in InsertCopy ({0})", e.Message), e);
}
}
