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56 lines (46 loc) · 1.89 KB
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/*
* Copyright 2025 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef THIRD_PARTY_CEL_PYTHON_PY_CEL_VALUE_PROVIDER_H_
#define THIRD_PARTY_CEL_PYTHON_PY_CEL_VALUE_PROVIDER_H_
#include <Python.h> // IWYU pragma: keep - Needed for PyObject
#include <memory>
#include <string>
#include "common/value.h"
#include "cel_expr_python/py_cel_env_internal.h"
#include "google/protobuf/arena.h"
#include "google/protobuf/descriptor.h"
#include "google/protobuf/message.h"
namespace cel_python {
// A CelValueProducer that produces a CelValue from a Python object on demand.
// Since CelActivation only invokes a CelValueProducer when a variable is used,
// this allows us to delay the conversion until evaluation time, and avoid doing
// the conversion if the variable is not used.
class PyCelValueProvider {
public:
PyCelValueProvider(std::string name, PyObject* value,
std::shared_ptr<PyCelEnvInternal> env);
~PyCelValueProvider();
cel::Value Provide(const google::protobuf::DescriptorPool* descriptor_pool,
google::protobuf::MessageFactory* message_factory,
google::protobuf::Arena* arena) const;
private:
std::string name_;
PyObject* py_object_;
std::shared_ptr<PyCelEnvInternal> env_;
cel::ErrorValue InvalidTypeError() const;
};
} // namespace cel_python
#endif // THIRD_PARTY_CEL_PYTHON_PY_CEL_VALUE_PROVIDER_H_