public static IEnumerable<Entity> GetEntities(string fileName)
{
using (var reader = new BackupReader(fileName))
{
List<Entity> entities = new List<Entity>();
var map = new Dictionary<Type, Dictionary<int, Entity>>();
var foreignKeys = new List<Tuple<EntityPropertyInfo, Action<object>, int>>();
var entityTypes = GetEntityTypes();
Entity entity = null;
EntityInfo entityInfo = null;
foreach (Line line in reader.GetLines().Select(s => new Line(s)))
{
if (line.Key == "$ENTITY")
{
if (!String.IsNullOrEmpty(line.Value) && entityTypes.TryGetValue(line.Value, out entityInfo))
entity = (Entity)Activator.CreateInstance(entityInfo.EntityType);
}
else if (line.Key == "$$" && entity != null)
{
if (!map.ContainsKey(entityInfo.EntityType))
map[entityInfo.EntityType] = new Dictionary<int, Entity>();
map[entityInfo.EntityType][entity.Id] = entity;
entities.Add(entity);
entity = null;
}
else if (entity != null && line.Value != null)
{
EntityPropertyInfo property;
if (entityInfo.Properties.TryGetValue(line.Key, out property))
{
if (typeof(Entity).IsAssignableFrom(property.PropertyType))
{
Entity cEntity = entity;
foreignKeys.Add(Tuple.Create(property, new Action<object>(v => property.SetValue(cEntity, v)), int.Parse(line.Value)));
}
else
property.SetValue(entity, line.Value);
}
}
}
foreach (Tuple<EntityPropertyInfo, Action<object>, int> link in foreignKeys)
{
Dictionary<int, Entity> mapById;
Entity linkedEntity;
if (map.TryGetValue(link.Item1.PropertyType, out mapById) && mapById.TryGetValue(link.Item3, out linkedEntity))
link.Item2(linkedEntity);
else if (link.Item1.Converter.GetType() != EntityPropertyAttribute.DefaultConverter)
{
try
{
link.Item2(link.Item3); // try to pass original ID to the converter
}
catch (InvalidCastException)
{
}
}
}
return entities;
}
}
public static IEnumerable <Entity> GetEntities(string fileName)
{
using (var reader = new BackupReader(fileName))
{
List <Entity> entities = new List <Entity>();
var map = new Dictionary <Type, Dictionary <int, Entity> >();
var foreignKeys = new List <Tuple <EntityPropertyInfo, Action <object>, int> >();
var entityTypes = GetEntityTypes();
Entity entity = null;
EntityInfo entityInfo = null;
foreach (Line line in reader.GetLines().Select(s => new Line(s)))
{
if (line.Key == "$ENTITY")
{
if (!String.IsNullOrEmpty(line.Value) && entityTypes.TryGetValue(line.Value, out entityInfo))
{
entity = (Entity)Activator.CreateInstance(entityInfo.EntityType);
}
}
else if (line.Key == "$$" && entity != null)
{
if (!map.ContainsKey(entityInfo.EntityType))
{
map[entityInfo.EntityType] = new Dictionary <int, Entity>();
}
map[entityInfo.EntityType][entity.Id] = entity;
entities.Add(entity);
entity = null;
}
else if (entity != null && line.Value != null)
{
EntityPropertyInfo property;
if (entityInfo.Properties.TryGetValue(line.Key, out property))
{
if (typeof(Entity).IsAssignableFrom(property.PropertyType))
{
Entity cEntity = entity;
foreignKeys.Add(Tuple.Create(property, new Action <object>(v => property.SetValue(cEntity, v)), int.Parse(line.Value)));
}
else
{
property.SetValue(entity, line.Value);
}
}
}
}
foreach (Tuple <EntityPropertyInfo, Action <object>, int> link in foreignKeys)
{
Dictionary <int, Entity> mapById;
Entity linkedEntity;
if (map.TryGetValue(link.Item1.PropertyType, out mapById) && mapById.TryGetValue(link.Item3, out linkedEntity))
{
link.Item2(linkedEntity);
}
else if (link.Item1.Converter.GetType() != EntityPropertyAttribute.DefaultConverter)
{
try
{
link.Item2(link.Item3); // try to pass original ID to the converter
}
catch (InvalidCastException)
{
}
}
}
return(entities);
}
}