protected override void ReadContent(ByteReader reader)
{
var info = reader.ReadString(HEADER_INFO.Length);
var ver = reader.ReadByte();
if (info != HEADER_INFO)
{
throw S3NoSqlException.InvalidDatabase();
}
if (ver != FILE_VERSION)
{
throw S3NoSqlException.InvalidDatabaseVersion(ver);
}
reader.ReadUInt16(); // to be compatible with old "ChangeID"
this.FreeEmptyPageID = reader.ReadUInt32();
this.LastPageID = reader.ReadUInt32();
this.UserVersion = reader.ReadUInt16();
this.Password = reader.ReadBytes(this.Password.Length);
this.Salt = reader.ReadBytes(this.Salt.Length);
// read page collections references (position on end of page)
var cols = reader.ReadByte();
for (var i = 0; i < cols; i++)
{
this.CollectionPages.Add(reader.ReadString(), reader.ReadUInt32());
}
}
private void InsertDocument(string _collectionName, BsonDocument doc)
{
BsonValue id;
// if no _id, add one as ObjectId
if (!doc.RawValue.TryGetValue("_id", out id))
{
doc["_id"] = id = ObjectId.NewObjectId();
}
// test if _id is a valid type
if (id.IsNull || id.IsMinValue || id.IsMaxValue)
{
throw S3NoSqlException.InvalidDataType("_id", id);
}
//m_Log.Write(Logger.COMMAND, "insert document on '{0}' :: _id = {1}", col.CollectionName, id);
// serialize object
var bytes = BsonSerializer.Serialize(doc);
using (MemoryStream stream = new MemoryStream(bytes))
{
S3Helper.WriteDocument(m_S3Client, DataBucket, Database, _collectionName, id.AsString, "application/ubjson", stream);
}
//TODO Queue calculation of the indexes for this document
}
public void Expect(JsonTokenType type1, JsonTokenType type2)
{
if (this.TokenType != type1 && this.TokenType != type2)
{
throw S3NoSqlException.UnexpectedToken(this.Token);
}
}
public static void AssertNullOrWhiteSpace(this string _str)
{
if (string.IsNullOrWhiteSpace(_str))
{
throw S3NoSqlException.NullParameter();
}
}
internal BsonValue ReadValue(JsonToken token)
{
switch (token.TokenType)
{
case JsonTokenType.String: return(token.Token);
case JsonTokenType.BeginDoc: return(this.ReadObject());
case JsonTokenType.BeginArray: return(this.ReadArray());
case JsonTokenType.Number:
return(token.Token.Contains(".") ?
new BsonValue(Convert.ToDouble(token.Token, CultureInfo.InvariantCulture.NumberFormat)) :
new BsonValue(Convert.ToInt32(token.Token)));
case JsonTokenType.Word:
switch (token.Token)
{
case "null": return(BsonValue.Null);
case "true": return(true);
case "false": return(false);
default: throw S3NoSqlException.UnexpectedToken(token.Token);
}
}
throw S3NoSqlException.UnexpectedToken(token.Token);
}
/// <summary>
/// Returns first free index slot to be used
/// </summary>
public CollectionIndex GetFreeIndex()
{
for (byte i = 0; i < this.Indexes.Length; i++)
{
if (this.Indexes[i].IsEmpty)
{
return(this.Indexes[i]);
}
}
throw S3NoSqlException.IndexLimitExceeded(this.CollectionName);
}
/// <summary>
/// Copy all file content to a steam
/// </summary>
public void Download(string id, Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var file = this.FindById(id);
if (file == null)
{
throw S3NoSqlException.FileNotFound(id);
}
file.CopyDataTo(stream);
}
/// <summary>
/// Load data inside storage and returns as Stream
/// </summary>
public Stream OpenRead(string id)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentNullException("id");
}
var file = this.FindById(id);
if (file == null)
{
throw S3NoSqlException.FileNotFound(id);
}
return(file.OpenReadData());
}
internal S3NoSqlFileInfo(S3NoSqlEngine engine, string id, string filename)
{
if (!IdPattern.IsMatch(id))
{
throw S3NoSqlException.InvalidFormat("FileId", id);
}
m_Engine = engine;
this.Id = id;
this.Filename = Path.GetFileName(filename);
this.MimeType = MimeTypeConverter.GetMimeType(this.Filename);
this.Length = 0;
this.Chunks = 0;
this.UploadDate = DateTime.Now;
this.Metadata = new BsonDocument();
}
public static PropertyInfo SelectProperty(IEnumerable <PropertyInfo> props, params Func <PropertyInfo, bool>[] predicates)
{
foreach (var predicate in predicates)
{
var prop = props.FirstOrDefault(predicate);
if (prop != null)
{
if (!prop.CanRead || !prop.CanWrite)
{
throw S3NoSqlException.PropertyReadWrite(prop);
}
return(prop);
}
}
return(null);
}
/// <summary>
/// Read a page with correct instance page object. Checks for pageType
/// </summary>
public static BasePage ReadPage(byte[] buffer)
{
var reader = new ByteReader(buffer);
var pageID = reader.ReadUInt32();
var pageType = (PageType)reader.ReadByte();
if (pageID == 0 && (byte)pageType > 5)
{
throw S3NoSqlException.InvalidDatabase();
}
var page = CreateInstance(pageID, pageType);
page.ReadHeader(reader);
page.ReadContent(reader);
page.DiskData = buffer;
return(page);
}
/// <summary>
/// Create a new instance from a Type
/// </summary>
public static object CreateInstance(Type type)
{
try
{
CreateObject c;
if (_cacheCtor.TryGetValue(type, out c))
{
return(c());
}
}
catch (Exception ex)
{
throw S3NoSqlException.InvalidCtor(type, ex);
}
lock (_cacheCtor)
{
try
{
CreateObject c = null;
if (type.GetTypeInfo().IsClass)
{
_cacheCtor.Add(type, c = CreateClass(type));
}
else if (type.GetTypeInfo().IsInterface) // some know interfaces
{
if (type.GetTypeInfo().IsGenericType&& type.GetGenericTypeDefinition() == typeof(IList <>))
{
return(CreateInstance(GetGenericListOfType(UnderlyingTypeOf(type))));
}
else if (type.GetTypeInfo().IsGenericType&& type.GetGenericTypeDefinition() == typeof(ICollection <>))
{
return(CreateInstance(GetGenericListOfType(UnderlyingTypeOf(type))));
}
else if (type.GetTypeInfo().IsGenericType&& type.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
return(CreateInstance(GetGenericListOfType(UnderlyingTypeOf(type))));
}
else if (type.GetTypeInfo().IsGenericType&& type.GetGenericTypeDefinition() == typeof(IDictionary <,>))
{
var k = type.GetTypeInfo().GenericTypeArguments[0];
var v = type.GetTypeInfo().GenericTypeArguments[1];
return(CreateInstance(GetGenericDictionaryOfType(k, v)));
}
else
{
throw S3NoSqlException.InvalidCtor(type, null);
}
}
else // structs
{
_cacheCtor.Add(type, c = CreateStruct(type));
}
return(c());
}
catch (Exception ex)
{
throw S3NoSqlException.InvalidCtor(type, ex);
}
}
}
internal BsonValue Serialize(Type type, object obj, int depth)
{
if (++depth > MAX_DEPTH)
{
throw S3NoSqlException.DocumentMaxDepth(MAX_DEPTH, type);
}
if (obj == null)
{
return(BsonValue.Null);
}
Func <object, BsonValue> custom;
// if is already a bson value
if (obj is BsonValue)
{
return(new BsonValue((BsonValue)obj));
}
// test string - mapper has some special options
else if (obj is String)
{
var str = this.TrimWhitespace ? (obj as String).Trim() : (String)obj;
if (this.EmptyStringToNull && str.Length == 0)
{
return(BsonValue.Null);
}
else
{
return(new BsonValue(str));
}
}
// basic Bson data types (cast datatype for better performance optimization)
else if (obj is Int32)
{
return(new BsonValue((Int32)obj));
}
else if (obj is Int64)
{
return(new BsonValue((Int64)obj));
}
else if (obj is Double)
{
return(new BsonValue((Double)obj));
}
else if (obj is Byte[])
{
return(new BsonValue((Byte[])obj));
}
else if (obj is ObjectId)
{
return(new BsonValue((ObjectId)obj));
}
else if (obj is Guid)
{
return(new BsonValue((Guid)obj));
}
else if (obj is Boolean)
{
return(new BsonValue((Boolean)obj));
}
else if (obj is DateTime)
{
return(new BsonValue((DateTime)obj));
}
// basic .net type to convert to bson
else if (obj is Int16 || obj is UInt16 || obj is Byte || obj is SByte)
{
return(new BsonValue(Convert.ToInt32(obj)));
}
else if (obj is UInt32 || obj is UInt64)
{
return(new BsonValue(Convert.ToInt64(obj)));
}
else if (obj is Single || obj is Decimal)
{
return(new BsonValue(Convert.ToDouble(obj)));
}
else if (obj is Char || obj is Enum)
{
return(new BsonValue(obj.ToString()));
}
// check if is a custom type
else if (_customSerializer.TryGetValue(type, out custom) || _customSerializer.TryGetValue(obj.GetType(), out custom))
{
return(custom(obj));
}
// for dictionary
else if (obj is IDictionary)
{
var itemType = type.GetTypeInfo().GenericTypeArguments[1];
return(this.SerializeDictionary(itemType, obj as IDictionary, depth));
}
// check if is a list or array
else if (obj is IEnumerable)
{
return(this.SerializeArray(Reflection.GetListItemType(obj.GetType()), obj as IEnumerable, depth));
}
// otherwise serialize as a plain object
else
{
return(this.SerializeObject(type, obj, depth));
}
}
/// <summary>
/// Use this method to override how your class can be, by defalut, mapped from entity to Bson document.
/// Returns an EntityMapper from each requested Type
/// </summary>
protected virtual EntityMapper BuildEntityMapper(Type type)
{
var mapper = new EntityMapper
{
Members = new List <MemberMapper>(),
ForType = type
};
var idAttr = typeof(BsonIdAttribute);
var ignoreAttr = typeof(BsonIgnoreAttribute);
var fieldAttr = typeof(BsonFieldAttribute);
var indexAttr = typeof(BsonIndexAttribute);
var dbrefAttr = typeof(BsonRefAttribute);
foreach (var memberInfo in this.GetTypeMembers(type))
{
// checks [BsonIgnore]
if (memberInfo.IsDefined(ignoreAttr, true))
{
continue;
}
// checks field name conversion
var name = this.ResolveFieldName(memberInfo.Name);
// checks if is _id
if (this.IsMemberId(type, memberInfo))
{
name = "_id";
}
// check if property has [BsonField]
var field = (BsonFieldAttribute)memberInfo.GetCustomAttributes(fieldAttr, false).FirstOrDefault();
// check if property has [BsonField] with a custom field name
if (field != null && field.Name != null)
{
name = field.Name;
}
// test if field name is OK (avoid to check in all instances) - do not test internal classes, like DbRef
if (BsonDocument.IsValidFieldName(name) == false)
{
throw S3NoSqlException.InvalidFormat(memberInfo.Name, name);
}
// create getter/setter function
var getter = Reflection.CreateGenericGetter(type, memberInfo);
var setter = Reflection.CreateGenericSetter(type, memberInfo);
// check if property has [BsonId] to get with was setted AutoId = true
var autoId = (BsonIdAttribute)memberInfo.GetCustomAttributes(idAttr, false).FirstOrDefault();
// checks if this proerty has [BsonIndex]
var index = (BsonIndexAttribute)memberInfo.GetCustomAttributes(indexAttr, false).FirstOrDefault();
// get data type
var dataType = memberInfo is PropertyInfo ?
(memberInfo as PropertyInfo).PropertyType :
(memberInfo as FieldInfo).FieldType;
// check if datatype is list/array
var isList = Reflection.IsList(dataType);
// create a property mapper
var member = new MemberMapper
{
AutoId = autoId == null ? true : autoId.AutoId,
FieldName = name,
MemberName = memberInfo.Name,
DataType = dataType,
IsUnique = index == null ? false : index.Unique,
IsList = isList,
UnderlyingType = isList ? Reflection.GetListItemType(dataType) : dataType,
Getter = getter,
Setter = setter
};
// check if property has [BsonRef]
var dbRef = (BsonRefAttribute)memberInfo.GetCustomAttributes(dbrefAttr, false).FirstOrDefault();
if (dbRef != null && memberInfo is PropertyInfo)
{
BsonMapper.RegisterDbRef(this, member, dbRef.Collection);
}
// support callback to user modify member mapper
if (this.ResolveMember != null)
{
this.ResolveMember(type, memberInfo, member);
}
// test if has name and there is no duplicate field
if (member.FieldName != null && mapper.Members.Any(x => x.FieldName == name) == false)
{
mapper.Members.Add(member);
}
}
return(mapper);
}
internal object Deserialize(Type type, BsonValue value)
{
Func <BsonValue, object> custom;
// null value - null returns
if (value.IsNull)
{
return(null);
}
// if is nullable, get underlying type
else if (Reflection.IsNullable(type))
{
type = Reflection.UnderlyingTypeOf(type);
}
// check if your type is already a BsonValue/BsonDocument/BsonArray
if (type == typeof(BsonValue))
{
return(new BsonValue(value));
}
else if (type == typeof(BsonDocument))
{
return(value.AsDocument);
}
else if (type == typeof(BsonArray))
{
return(value.AsArray);
}
// raw values to native bson values
else if (_bsonTypes.Contains(type))
{
return(value.RawValue);
}
// simple ConvertTo to basic .NET types
else if (_basicTypes.Contains(type))
{
return(Convert.ChangeType(value.RawValue, type));
}
// enum value is an int
else if (type.GetTypeInfo().IsEnum)
{
return(Enum.Parse(type, value.AsString));
}
// test if has a custom type implementation
else if (_customDeserializer.TryGetValue(type, out custom))
{
return(custom(value));
}
// if value is array, deserialize as array
else if (value.IsArray)
{
if (type.IsArray)
{
return(this.DeserializeArray(type.GetElementType(), value.AsArray));
}
else
{
return(this.DeserializeList(type, value.AsArray));
}
}
// if value is document, deserialize as document
else if (value.IsDocument)
{
BsonValue typeField;
var doc = value.AsDocument;
// test if value is object and has _type
if (doc.RawValue.TryGetValue("_type", out typeField))
{
type = Type.GetType(typeField.AsString);
if (type == null)
{
throw S3NoSqlException.InvalidTypedName(typeField.AsString);
}
}
var o = _typeInstanciator(type);
if (o is IDictionary && type.GetTypeInfo().IsGenericType)
{
var k = type.GetTypeInfo().GenericTypeArguments[0];
var t = type.GetTypeInfo().GenericTypeArguments[1];
this.DeserializeDictionary(k, t, (IDictionary)o, value.AsDocument);
}
else
{
this.DeserializeObject(type, o, doc);
}
return(o);
}
// in last case, return value as-is - can cause "cast error"
// it's used for "public object MyInt { get; set; }"
return(value.RawValue);
}
