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// 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
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Author: anuraag@google.com (Anuraag Agrawal)
// Author: tibell@google.com (Johan Tibell)
#ifndef GOOGLE_PROTOBUF_PYTHON_CPP_REPEATED_COMPOSITE_CONTAINER_H__
#define GOOGLE_PROTOBUF_PYTHON_CPP_REPEATED_COMPOSITE_CONTAINER_H__
#include <Python.h>
#include <memory>
#include <string>
#include <vector>
#include <google/protobuf/pyext/message.h>
namespace google {
namespace protobuf {
class FieldDescriptor;
class Message;
namespace python {
struct CMessageClass;
// A RepeatedCompositeContainer can be in one of two states: attached
// or released.
//
// When in the attached state all modifications to the container are
// done both on the 'message' and on the 'child_messages'
// list. In this state all Messages referred to by the children in
// 'child_messages' are owner by the 'owner'.
//
// When in the released state 'message', 'owner', 'parent', and
// 'parent_field_descriptor' are NULL.
typedef struct RepeatedCompositeContainer {
PyObject_HEAD;
// This is the top-level C++ Message object that owns the whole
// proto tree. Every Python RepeatedCompositeContainer holds a
// reference to it in order to keep it alive as long as there's a
// Python object that references any part of the tree.
CMessage::OwnerRef owner;
// Weak reference to parent object. May be NULL. Used to make sure
// the parent is writable before modifying the
// RepeatedCompositeContainer.
CMessage* parent;
// A descriptor used to modify the underlying 'message'.
// The pointer is owned by the global DescriptorPool.
const FieldDescriptor* parent_field_descriptor;
// Pointer to the C++ Message that contains this container. The
// RepeatedCompositeContainer does not own this pointer.
//
// If NULL, this message has been released from its parent (by
// calling Clear() or ClearField() on the parent.
Message* message;
// The type used to create new child messages.
CMessageClass* child_message_class;
// A list of child messages.
PyObject* child_messages;
} RepeatedCompositeContainer;
extern PyTypeObject RepeatedCompositeContainer_Type;
namespace repeated_composite_container {
// Builds a RepeatedCompositeContainer object, from a parent message and a
// field descriptor.
PyObject *NewContainer(
CMessage* parent,
const FieldDescriptor* parent_field_descriptor,
CMessageClass *child_message_class);
// Appends a new CMessage to the container and returns it. The
// CMessage is initialized using the content of kwargs.
//
// Returns a new reference if successful; returns NULL and sets an
// exception if unsuccessful.
PyObject* Add(RepeatedCompositeContainer* self,
PyObject* args,
PyObject* kwargs);
// Appends all the CMessages in the input iterator to the container.
//
// Returns None if successful; returns NULL and sets an exception if
// unsuccessful.
PyObject* Extend(RepeatedCompositeContainer* self, PyObject* value);
// Appends a new message to the container for each message in the
// input iterator, merging each data element in. Equivalent to extend.
//
// Returns None if successful; returns NULL and sets an exception if
// unsuccessful.
PyObject* MergeFrom(RepeatedCompositeContainer* self, PyObject* other);
// Accesses messages in the container.
//
// Returns a new reference to the message for an integer parameter.
// Returns a new reference to a list of messages for a slice.
PyObject* Subscript(RepeatedCompositeContainer* self, PyObject* slice);
// Deletes items from the container (cannot be used for assignment).
//
// Returns 0 on success, -1 on failure.
int AssignSubscript(RepeatedCompositeContainer* self,
PyObject* slice,
PyObject* value);
// Releases the messages in the container to a new message.
//
// Returns 0 on success, -1 on failure.
int Release(RepeatedCompositeContainer* self);
// Returns 0 on success, -1 on failure.
int SetOwner(RepeatedCompositeContainer* self,
const CMessage::OwnerRef& new_owner);
// Removes the last element of the repeated message field 'field' on
// the Message 'parent', and transfers the ownership of the released
// Message to 'target'.
//
// Corresponds to reflection api method ReleaseMessage.
void ReleaseLastTo(CMessage* parent,
const FieldDescriptor* field,
CMessage* target);
} // namespace repeated_composite_container
} // namespace python
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_PYTHON_CPP_REPEATED_COMPOSITE_CONTAINER_H__
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