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// Copyright 2023 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
//
// https://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.
#include "runtime/reference_resolver.h"
#include "absl/base/macros.h"
#include "absl/log/absl_log.h"
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "common/native_type.h"
#include "eval/compiler/qualified_reference_resolver.h"
#include "internal/casts.h"
#include "internal/status_macros.h"
#include "runtime/internal/runtime_friend_access.h"
#include "runtime/internal/runtime_impl.h"
#include "runtime/runtime.h"
#include "runtime/runtime_builder.h"
namespace cel {
namespace {
using ::cel::internal::down_cast;
using ::cel::runtime_internal::RuntimeFriendAccess;
using ::cel::runtime_internal::RuntimeImpl;
absl::StatusOr<RuntimeImpl*> RuntimeImplFromBuilder(RuntimeBuilder& builder) {
Runtime& runtime = RuntimeFriendAccess::GetMutableRuntime(builder);
if (RuntimeFriendAccess::RuntimeTypeId(runtime) !=
NativeTypeId::For<RuntimeImpl>()) {
return absl::UnimplementedError(
"regex precompilation only supported on the default cel::Runtime "
"implementation.");
}
RuntimeImpl& runtime_impl = down_cast<RuntimeImpl&>(runtime);
return &runtime_impl;
}
google::api::expr::runtime::ReferenceResolverOption Convert(
ReferenceResolverEnabled enabled) {
switch (enabled) {
case ReferenceResolverEnabled::kCheckedExpressionOnly:
return google::api::expr::runtime::ReferenceResolverOption::kCheckedOnly;
case ReferenceResolverEnabled::kAlways:
return google::api::expr::runtime::ReferenceResolverOption::kAlways;
}
ABSL_LOG(FATAL) << "unsupported ReferenceResolverEnabled enumerator: "
<< static_cast<int>(enabled);
}
} // namespace
absl::Status EnableReferenceResolver(RuntimeBuilder& builder,
ReferenceResolverEnabled enabled) {
CEL_ASSIGN_OR_RETURN(RuntimeImpl * runtime_impl,
RuntimeImplFromBuilder(builder));
ABSL_ASSERT(runtime_impl != nullptr);
runtime_impl->expr_builder().AddAstTransform(
NewReferenceResolverExtension(Convert(enabled)));
return absl::OkStatus();
}
} // namespace cel