internal LiteCollection(string name, BsonAutoId autoId, ILiteEngine engine, BsonMapper mapper)
{
_collection = name ?? mapper.ResolveCollectionName(typeof(T));
_engine = engine;
_mapper = mapper;
_includes = new List <BsonExpression>();
// if strong typed collection, get _id member mapped (if exists)
if (typeof(T) == typeof(BsonDocument))
{
_entity = null;
_id = null;
_autoId = autoId;
}
else
{
_entity = mapper.GetEntityMapper(typeof(T));
_id = _entity.Id;
if (_id != null && _id.AutoId)
{
_autoId =
_id.DataType == typeof(Int32) || _id.DataType == typeof(Int32?) ? BsonAutoId.Int32 :
_id.DataType == typeof(Int64) || _id.DataType == typeof(Int64?) ? BsonAutoId.Int64 :
_id.DataType == typeof(Guid) || _id.DataType == typeof(Guid?) ? BsonAutoId.Guid :
BsonAutoId.ObjectId;
}
else
{
_autoId = BsonAutoId.ObjectId;
}
}
}
/// <summary>
/// Register a property as a DbRef - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefItem(BsonMapper mapper, MemberMapper member, string collection)
{
// get entity
var entity = mapper.GetEntityMapper(member.DataType);
member.Serialize = (obj, m) =>
{
var idField = entity.Id;
var id = idField.Getter(obj);
return(new BsonDocument
{
{ "$id", new BsonValue(id) },
{ "$ref", collection }
});
};
member.Deserialize = (bson, m) =>
{
var idRef = bson.AsDocument["$id"];
return(m.Deserialize(entity.ForType,
idRef.IsNull ?
bson : // if has no $id object was full loaded (via Include) - so deserialize using normal function
new BsonDocument {
{ "_id", idRef }
})); // if has $id, deserialize object using only _id object
};
}
public LiteCollection(string name, LazyLoad <LiteEngine> engine, BsonMapper mapper, Logger log)
{
_name = name ?? mapper.ResolveCollectionName(typeof(T));
_engine = engine;
_mapper = mapper;
_log = log;
_visitor = new QueryVisitor <T>(mapper);
_includes = new List <string>();
// if strong typed collection, get _id member mapped (if exists)
if (typeof(T) != typeof(BsonDocument))
{
var entity = mapper.GetEntityMapper(typeof(T));
_id = entity.Id;
if (_id != null && _id.AutoId)
{
_autoId =
_id.DataType == typeof(ObjectId) ? BsonType.ObjectId :
_id.DataType == typeof(Guid) ? BsonType.Guid :
_id.DataType == typeof(DateTime) ? BsonType.DateTime :
_id.DataType == typeof(Int32) ? BsonType.Int32 :
_id.DataType == typeof(Int64) ? BsonType.Int64 :
BsonType.Null;
}
}
}
/// <summary>
/// Register a property as a DbRefList - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefList(BsonMapper mapper, MemberMapper member, string collection)
{
// get entity from list item type
var entity = mapper.GetEntityMapper(member.UnderlyingType);
member.Serialize = (list, m) =>
{
var result = new BsonArray();
var idField = entity.Id;
foreach (var item in (IEnumerable)list)
{
if (item == null)
{
continue;
}
result.Add(new BsonDocument
{
{ "$id", new BsonValue(idField.Getter(item)) },
{ "$ref", collection }
});
}
return(result);
};
member.Deserialize = (bson, m) =>
{
var array = bson.AsArray;
if (array.Count == 0)
{
return(m.Deserialize(member.DataType, array));
}
var hasIdRef = array[0].AsDocument == null || array[0].AsDocument["$id"].IsNull;
if (hasIdRef)
{
// if no $id, deserialize as full (was loaded via Include)
return(m.Deserialize(member.DataType, array));
}
else
{
// copy array changing $id to _id
var arr = new BsonArray();
foreach (var item in array)
{
arr.Add(new BsonDocument {
{ "_id", item.AsDocument["$id"] }
});
}
return(m.Deserialize(member.DataType, arr));
}
};
}
/// <summary>
/// Register a property as a DbRef - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefItem(BsonMapper mapper, MemberMapper member, ITypeNameBinder typeNameBinder, string collection)
{
// get entity
var entity = mapper.GetEntityMapper(member.DataType);
member.Serialize = (obj, m) =>
{
// supports null values when "SerializeNullValues = true"
if (obj == null)
{
return(BsonValue.Null);
}
var idField = entity.Id;
// #768 if using DbRef with interface with no ID mapped
if (idField == null)
{
throw new LiteException(0, "There is no _id field mapped in your type: " + member.DataType.FullName);
}
var id = idField.Getter(obj);
var bsonDocument = new BsonDocument
{
["$id"] = m.Serialize(id.GetType(), id, 0),
["$ref"] = collection
};
if (member.DataType != obj.GetType())
{
bsonDocument["$type"] = typeNameBinder.GetName(obj.GetType());
}
return(bsonDocument);
};
member.Deserialize = (bson, m) =>
{
var idRef = bson.IsDocument ? bson["$id"] : BsonValue.Null;
var missing = bson.IsDocument ? (bson["$missing"] == true) : false;
if (missing)
{
return(null);
}
return(m.Deserialize(entity.ForType,
idRef.IsNull ?
bson : // if has no $id object was full loaded (via Include) - so deserialize using normal function
bson.AsDocument.ContainsKey("$type") ?
new BsonDocument {
["_id"] = idRef, ["_type"] = bson["$type"]
} :
new BsonDocument {
["_id"] = idRef
})); // if has $id, deserialize object using only _id object
};
}
/// <summary>
/// Register a property as a DbRef - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefItem(BsonMapper mapper, MemberMapper member, string collection)
{
// get entity
var entity = mapper.GetEntityMapper(member.DataType);
member.Serialize = (obj, m) =>
{
// supports null values when "SerializeNullValues = true"
if (obj == null)
{
return(BsonValue.Null);
}
var idField = entity.Id;
// #768 if using DbRef with interface with no ID mapped
if (idField == null)
{
throw new LiteException("There is no _id field mapped in your type: " + member.DataType.FullName);
}
var id = idField.Getter(obj);
var bsonDocument = new BsonDocument
{
{ "$id", m.Serialize(id.GetType(), id, 0) },
{ "$ref", collection }
};
if (member.DataType.GetTypeInfo().IsInterface || member.DataType.GetTypeInfo().IsAbstract)
{
bsonDocument["$type"] = obj.GetType().FullName + ", " +
obj.GetType().GetTypeInfo().Assembly.GetName().Name;
}
return(bsonDocument);
};
member.Deserialize = (bson, m) =>
{
var idRef = bson.AsDocument["$id"];
return(m.Deserialize(entity.ForType,
idRef.IsNull
? bson
: // if has no $id object was full loaded (via Include) - so deserialize using normal function
member.DataType.GetTypeInfo().IsAbstract || member.DataType.GetTypeInfo().IsInterface
? new BsonDocument {
{ "_id", idRef }, { "_type", bson.AsDocument["$type"] }
}
: new BsonDocument {
{ "_id", idRef }
})); // if has $id, deserialize object using only _id object
};
}
/// <summary>
/// Returns document field name for some type member
/// </summary>
private string ResolveMember(MemberInfo member)
{
var name = member.Name;
// get class entity from mapper
var entity = _mapper.GetEntityMapper(member.DeclaringType);
var field = entity.Members.FirstOrDefault(x => x.MemberName == name);
if (field == null)
{
throw new NotSupportedException($"Member {name} not found on BsonMapper for type {member.DeclaringType}.");
}
return("." + field.FieldName);
}
/// <summary>
/// Based on a LINQ expression, returns document field mapped from class Property.
/// Support multi level dotted notation: x => x.Customer.Name
/// Prefix is used on array expression like: x => x.Customers.Any(z => z.Name == "John")
/// </summary>
public string GetField(Expression expr, string prefix = "", bool showArrayItems = false)
{
var property = prefix + expr.GetPath();
var parts = property.Split('.');
var fields = new string[parts.Length];
var type = _type;
var isdbref = false;
// loop "first.second.last"
for (var i = 0; i < parts.Length; i++)
{
var entity = _mapper.GetEntityMapper(type);
var part = parts[i];
var prop = entity.Members.Find(x => x.MemberName == part);
if (prop == null)
{
throw new NotSupportedException(property + " not mapped in " + type.Name);
}
// if property is an IEnumerable, gets underlying type (otherwise, gets PropertyType)
type = prop.UnderlyingType;
fields[i] = prop.FieldName;
if (showArrayItems && prop.IsList)
{
fields[i] += "[*]";
}
if (prop.FieldName == "_id" && isdbref)
{
isdbref = false;
fields[i] = "$id";
}
// if this property is DbRef, so if next property is _id, change to $id
if (prop.IsDbRef)
{
isdbref = true;
}
}
return(string.Join(".", fields));
}
/// <summary>
/// Based on an expression, returns document field mapped from class Property.
/// Support multi level dotted notation: x => x.Customer.Name
/// Prefix is used on array expression like: x => x.Customers.Any(z => z.Name == "John") (prefix = "Customers."
/// </summary>
public string GetField(Expression expr, string prefix = "")
{
var property = prefix + expr.GetPath();
var parts = property.Split('.');
var fields = new string[parts.Length];
var type = _type;
var isdbref = false;
// loop "first.second.last"
for (var i = 0; i < parts.Length; i++)
{
var entity = _mapper.GetEntityMapper(type);
var part = parts[i];
var prop = entity.Members.Find(x => x.MemberName == part);
if (prop == null)
{
throw LiteException.PropertyNotMapped(property);
}
// if property is a IEnumerable, gets underlayer type (otherwise, gets PropertyType)
type = prop.UnderlyingType;
fields[i] = prop.FieldName;
if (prop.FieldName == "_id" && isdbref)
{
isdbref = false;
fields[i] = "$id";
}
// if this property is DbRef, so if next property is _id, change to $id
if (prop.IsDbRef)
{
isdbref = true;
}
}
return(string.Join(".", fields));
}
/// <summary>
/// Returns document field name for some type member
/// </summary>
private string ResolveMember(MemberInfo member)
{
var name = member.Name;
// checks if parent field are not DbRef (checks for same dataType)
var isParentDbRef = _dbRefType != null && _dbRefType == member.DeclaringType;
// get class entity from mapper
var entity = _mapper.GetEntityMapper(member.DeclaringType);
// get mapped field from entity
var field = entity.Members.FirstOrDefault(x => x.MemberName == name);
if (field == null)
{
throw new NotSupportedException($"Member {name} not found on BsonMapper for type {member.DeclaringType}.");
}
// define if this field are DbRef (child will need check parent)
_dbRefType = field.IsDbRef ? field.UnderlyingType : null;
// if parent call is DbRef and are calling _id field, rename to $id
return("." + (isParentDbRef && field.FieldName == "_id" ? "$id" : field.FieldName));
}
/// <summary>
/// Register a property as a DbRef - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefItem(BsonMapper mapper, MemberMapper member, string collection)
{
// get entity
var entity = mapper.GetEntityMapper(member.DataType);
member.Serialize = (obj, m) =>
{
var idField = entity.Id;
// #768 if using DbRef with interface with no ID mapped
if (idField == null)
{
throw new LiteException("There is no _id field mapped in your type: " + member.DataType.FullName);
}
var id = idField.Getter(obj);
return(new BsonDocument
{
{ "$id", new BsonValue(id) },
{ "$ref", collection }
});
};
member.Deserialize = (bson, m) =>
{
var idRef = bson.AsDocument["$id"];
return(m.Deserialize(entity.ForType,
idRef.IsNull ?
bson : // if has no $id object was full loaded (via Include) - so deserialize using normal function
new BsonDocument {
{ "_id", idRef }
})); // if has $id, deserialize object using only _id object
};
}
internal EntityBuilder(BsonMapper mapper, ITypeNameBinder typeNameBinder)
{
_mapper = mapper;
_typeNameBinder = typeNameBinder;
_entity = mapper.GetEntityMapper(typeof(T));
}
/// <summary>
/// Register a property as a DbRefList - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefList(BsonMapper mapper, MemberMapper member, string collection)
{
// get entity from list item type
var entity = mapper.GetEntityMapper(member.UnderlyingType);
member.Serialize = (list, m) =>
{
// supports null values when "SerializeNullValues = true"
if (list == null)
{
return(BsonValue.Null);
}
var result = new BsonArray();
var idField = entity.Id;
foreach (var item in (IEnumerable)list)
{
if (item == null)
{
continue;
}
var id = idField.Getter(item);
result.Add(new BsonDocument
{
{ "$id", m.Serialize(id.GetType(), id, 0) },
{ "$ref", collection }
});
}
return(result);
};
member.Deserialize = (bson, m) =>
{
var array = bson.AsArray;
if (array.Count == 0)
{
return(m.Deserialize(member.DataType, array));
}
// copy array changing $id to _id
var result = new BsonArray();
foreach (var item in array)
{
var refId = item.AsDocument["$id"];
// if refId is null was included by "include" query, so "item" is full filled document
if (refId.IsNull)
{
result.Add(item);
}
else
{
result.Add(new BsonDocument {
{ "_id", refId }
});
}
}
return(m.Deserialize(member.DataType, result));
};
}
internal EntityBuilder(BsonMapper mapper)
{
_mapper = mapper;
_entity = mapper.GetEntityMapper(typeof(T));
}
/// <summary>
/// Register a property as a DbRefList - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefList(BsonMapper mapper, MemberMapper member, ITypeNameBinder typeNameBinder, string collection)
{
// get entity from list item type
var entity = mapper.GetEntityMapper(member.UnderlyingType);
member.Serialize = (list, m) =>
{
// supports null values when "SerializeNullValues = true"
if (list == null)
{
return(BsonValue.Null);
}
var result = new BsonArray();
var idField = entity.Id;
foreach (var item in (IEnumerable)list)
{
if (item == null)
{
continue;
}
var id = idField.Getter(item);
var bsonDocument = new BsonDocument
{
["$id"] = m.Serialize(id.GetType(), id, 0),
["$ref"] = collection
};
if (member.UnderlyingType != item.GetType())
{
bsonDocument["$type"] = typeNameBinder.GetName(item.GetType());
}
result.Add(bsonDocument);
}
return(result);
};
member.Deserialize = (bson, m) =>
{
if (bson.IsArray == false)
{
return(null);
}
var array = bson.AsArray;
if (array.Count == 0)
{
return(m.Deserialize(member.DataType, array));
}
// copy array changing $id to _id
var result = new BsonArray();
foreach (var item in array)
{
if (item.IsDocument == false)
{
continue;
}
var doc = item.AsDocument;
var idRef = doc["$id"];
var missing = doc["$missing"] == true;
var included = doc.ContainsKey("$ref") == false;
// if referece document are missing, do not inlcude on output list
if (missing)
{
continue;
}
// if refId is null was included by "include" query, so "item" is full filled document
if (included)
{
item["_id"] = idRef;
if (item.AsDocument.ContainsKey("$type"))
{
item["_type"] = item["$type"];
}
result.Add(item);
}
else
{
var bsonDocument = new BsonDocument {
["_id"] = idRef
};
if (item.AsDocument.ContainsKey("$type"))
{
bsonDocument["_type"] = item["$type"];
}
result.Add(bsonDocument);
}
}
return(m.Deserialize(member.DataType, result));
};
}
/// <summary>
/// Register a property as a DbRef - implement a custom Serialize/Deserialize actions to convert entity to $id, $ref only
/// </summary>
private static void RegisterDbRefItem(BsonMapper mapper, MemberMapper member, ITypeNameBinder typeNameBinder, string collection)
{
// get entity
var entity = mapper.GetEntityMapper(member.DataType);
member.Serialize = (obj, m) =>
{
// supports null values when "SerializeNullValues = true"
if (obj == null)
{
return(BsonValue.Null);
}
var idField = entity.Id;
// #768 if using DbRef with interface with no ID mapped
if (idField == null)
{
throw new LiteException(0, "There is no _id field mapped in your type: " + member.DataType.FullName);
}
var id = idField.Getter(obj);
var bsonDocument = new BsonDocument
{
["$id"] = m.Serialize(id.GetType(), id, 0),
["$ref"] = collection
};
if (member.DataType != obj.GetType())
{
bsonDocument["$type"] = typeNameBinder.GetName(obj.GetType());
}
return(bsonDocument);
};
member.Deserialize = (bson, m) =>
{
// if not a document (maybe BsonValue.null) returns null
if (bson == null || bson.IsDocument == false)
{
return(null);
}
var doc = bson.AsDocument;
var idRef = doc["$id"];
var missing = doc["$missing"] == true;
var included = doc.ContainsKey("$ref") == false;
if (missing)
{
return(null);
}
if (included)
{
doc["_id"] = idRef;
if (doc.ContainsKey("$type"))
{
doc["_type"] = bson["$type"];
}
return(m.Deserialize(entity.ForType, doc));
}
else
{
return(m.Deserialize(entity.ForType,
doc.ContainsKey("$type") ?
new BsonDocument {
["_id"] = idRef, ["_type"] = bson["$type"]
} :
new BsonDocument {
["_id"] = idRef
})); // if has $id, deserialize object using only _id object
}
};
}
