3 ��h�@sHdZddlmZddlmZGdd�dej�Zeej�d�Zdd�Zd S) aRA database of Python protocol buffer generated symbols. SymbolDatabase is the MessageFactory for messages generated at compile time, and makes it easy to create new instances of a registered type, given only the type's protocol buffer symbol name. Example usage: db = symbol_database.SymbolDatabase() # Register symbols of interest, from one or multiple files. db.RegisterFileDescriptor(my_proto_pb2.DESCRIPTOR) db.RegisterMessage(my_proto_pb2.MyMessage) db.RegisterEnumDescriptor(my_proto_pb2.MyEnum.DESCRIPTOR) # The database can be used as a MessageFactory, to generate types based on # their name: types = db.GetMessages(['my_proto.proto']) my_message_instance = types['MyMessage']() # The database's underlying descriptor pool can be queried, so it's not # necessary to know a type's filename to be able to generate it: filename = db.pool.FindFileContainingSymbol('MyMessage') my_message_instance = db.GetMessages([filename])['MyMessage']() # This functionality is also provided directly via a convenience method: my_message_instance = db.GetSymbol('MyMessage')() �)�descriptor_pool)�message_factoryc@sHeZdZdZdd�Zdd�Zdd�Zdd �Zd d�Zdd �Z dd�Z dS)�SymbolDatabasez'A database of Python generated symbols.cCs|j}||j|<|j|�|S)z�Registers the given message type in the local database. Calls to GetSymbol() and GetMessages() will return messages registered here. Args: message: a message.Message, to be registered. Returns: The provided message. )Z DESCRIPTOR�_classes�RegisterMessageDescriptor)�self�message�desc�r �%/usr/lib/python3.6/symbol_database.py�RegisterMessageDs zSymbolDatabase.RegisterMessagecCs|jj|�dS)z�Registers the given message descriptor in the local database. Args: message_descriptor: a descriptor.MessageDescriptor. N)�poolZ AddDescriptor)rZmessage_descriptorr r rrUsz(SymbolDatabase.RegisterMessageDescriptorcCs|jj|�|S)z�Registers the given enum descriptor in the local database. Args: enum_descriptor: a descriptor.EnumDescriptor. Returns: The provided descriptor. )r ZAddEnumDescriptor)rZenum_descriptorr r r�RegisterEnumDescriptor]s z%SymbolDatabase.RegisterEnumDescriptorcCs|jj|�dS)z�Registers the given service descriptor in the local database. Args: service_descriptor: a descriptor.ServiceDescriptor. Returns: The provided descriptor. N)r ZAddServiceDescriptor)rZservice_descriptorr r r�RegisterServiceDescriptoris z(SymbolDatabase.RegisterServiceDescriptorcCs|jj|�dS)z�Registers the given file descriptor in the local database. Args: file_descriptor: a descriptor.FileDescriptor. Returns: The provided descriptor. N)r ZAddFileDescriptor)rZfile_descriptorr r r�RegisterFileDescriptorts z%SymbolDatabase.RegisterFileDescriptorcCs|j|jj|�S)axTries to find a symbol in the local database. Currently, this method only returns message.Message instances, however, if may be extended in future to support other symbol types. Args: symbol: A str, a protocol buffer symbol. Returns: A Python class corresponding to the symbol. Raises: KeyError: if the symbol could not be found. )rr ZFindMessageTypeByName)rZsymbolr r r� GetSymbolszSymbolDatabase.GetSymbolcs��fdd��i}xl|D]d}|jj|�}xRt|jj��D]@}x:�|�D].}y|j|||j<WqDtk rpYqDXqDWq6WqW|S)aGets all registered messages from a specified file. Only messages already created and registered will be returned; (this is the case for imported _pb2 modules) But unlike MessageFactory, this version also returns already defined nested messages, but does not register any message extensions. Args: files: The file names to extract messages from. Returns: A dictionary mapping proto names to the message classes. Raises: KeyError: if a file could not be found. c3s2|Vx&|jD]}x�|�D] }|VqWqWdS)zCWalk a message Descriptor and recursively yields all message names.N)Znested_types)r �msg_descZnested_desc)�_GetAllMessagesr rr�sz3SymbolDatabase.GetMessages.._GetAllMessages)r ZFindFileByName�listZmessage_types_by_name�valuesrZ full_name�KeyError)r�files�result� file_nameZ file_descrr r )rr�GetMessages�s zSymbolDatabase.GetMessagesN)�__name__� __module__�__qualname__�__doc__rrrrrrrr r r rrAsr)r cCstS)z#Returns the default SymbolDatabase.)�_DEFAULTr r r r�Default�sr N)rZgoogle.protobufrrZMessageFactoryrr rr r r r�:s w