| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef GOOGLE_PROTOBUF_PYTHON_CPP_MESSAGE_FACTORY_H__ |
| #define GOOGLE_PROTOBUF_PYTHON_CPP_MESSAGE_FACTORY_H__ |
| |
| #include <Python.h> |
| |
| #include <unordered_map> |
| #include <google/protobuf/descriptor.h> |
| #include <google/protobuf/pyext/descriptor_pool.h> |
| |
| namespace google { |
| namespace protobuf { |
| class MessageFactory; |
| |
| namespace python { |
| |
| // The (meta) type of all Messages classes. |
| struct CMessageClass; |
| |
| struct PyMessageFactory { |
| PyObject_HEAD |
| |
| // DynamicMessageFactory used to create C++ instances of messages. |
| // This object cache the descriptors that were used, so the DescriptorPool |
| // needs to get rid of it before it can delete itself. |
| // |
| // Note: A C++ MessageFactory is different from the PyMessageFactory. |
| // The C++ one creates messages, when the Python one creates classes. |
| MessageFactory* message_factory; |
| |
| // Owned reference to a Python DescriptorPool. |
| // This reference must stay until the message_factory is destructed. |
| PyDescriptorPool* pool; |
| |
| // Make our own mapping to retrieve Python classes from C++ descriptors. |
| // |
| // Descriptor pointers stored here are owned by the DescriptorPool above. |
| // Python references to classes are owned by this PyDescriptorPool. |
| typedef std::unordered_map<const Descriptor*, CMessageClass*> |
| ClassesByMessageMap; |
| ClassesByMessageMap* classes_by_descriptor; |
| }; |
| |
| extern PyTypeObject PyMessageFactory_Type; |
| |
| namespace message_factory { |
| |
| // Creates a new MessageFactory instance. |
| PyMessageFactory* NewMessageFactory(PyTypeObject* type, PyDescriptorPool* pool); |
| |
| // Registers a new Python class for the given message descriptor. |
| // On error, returns -1 with a Python exception set. |
| int RegisterMessageClass(PyMessageFactory* self, |
| const Descriptor* message_descriptor, |
| CMessageClass* message_class); |
| // Retrieves the Python class registered with the given message descriptor, or |
| // fail with a TypeError. Returns a *borrowed* reference. |
| CMessageClass* GetMessageClass(PyMessageFactory* self, |
| const Descriptor* message_descriptor); |
| // Retrieves the Python class registered with the given message descriptor. |
| // The class is created if not done yet. Returns a *new* reference. |
| CMessageClass* GetOrCreateMessageClass(PyMessageFactory* self, |
| const Descriptor* message_descriptor); |
| } // namespace message_factory |
| |
| // Initialize objects used by this module. |
| // On error, returns false with a Python exception set. |
| bool InitMessageFactory(); |
| |
| } // namespace python |
| } // namespace protobuf |
| } // namespace google |
| |
| #endif // GOOGLE_PROTOBUF_PYTHON_CPP_MESSAGE_FACTORY_H__ |