1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#pragma clang system_header
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
// NOTE: API is EXPERIMENTAL and will change without going through a
// deprecation cycle
#pragma once
#include <memory>
#include <string>
#include <vector>
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/result.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/status.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/util/visibility.h"
namespace arrow20 {
namespace compute {
class Function;
class FunctionOptionsType;
/// \brief A mutable central function registry for built-in functions as well
/// as user-defined functions. Functions are implementations of
/// arrow20::compute::Function.
///
/// Generally, each function contains kernels which are implementations of a
/// function for a specific argument signature. After looking up a function in
/// the registry, one can either execute it eagerly with Function::Execute or
/// use one of the function's dispatch methods to pick a suitable kernel for
/// lower-level function execution.
class ARROW_EXPORT FunctionRegistry {
public:
~FunctionRegistry();
/// \brief Construct a new registry.
///
/// Most users only need to use the global registry.
static std::unique_ptr<FunctionRegistry> Make();
/// \brief Construct a new nested registry with the given parent.
///
/// Most users only need to use the global registry. The returned registry never changes
/// its parent, even when an operation allows overwriting.
static std::unique_ptr<FunctionRegistry> Make(FunctionRegistry* parent);
/// \brief Check whether a new function can be added to the registry.
///
/// \returns Status::KeyError if a function with the same name is already registered.
Status CanAddFunction(std::shared_ptr<Function> function, bool allow_overwrite = false);
/// \brief Add a new function to the registry.
///
/// \returns Status::KeyError if a function with the same name is already registered.
Status AddFunction(std::shared_ptr<Function> function, bool allow_overwrite = false);
/// \brief Check whether an alias can be added for the given function name.
///
/// \returns Status::KeyError if the function with the given name is not registered.
Status CanAddAlias(const std::string& target_name, const std::string& source_name);
/// \brief Add alias for the given function name.
///
/// \returns Status::KeyError if the function with the given name is not registered.
Status AddAlias(const std::string& target_name, const std::string& source_name);
/// \brief Check whether a new function options type can be added to the registry.
///
/// \return Status::KeyError if a function options type with the same name is already
/// registered.
Status CanAddFunctionOptionsType(const FunctionOptionsType* options_type,
bool allow_overwrite = false);
/// \brief Add a new function options type to the registry.
///
/// \returns Status::KeyError if a function options type with the same name is already
/// registered.
Status AddFunctionOptionsType(const FunctionOptionsType* options_type,
bool allow_overwrite = false);
/// \brief Retrieve a function by name from the registry.
Result<std::shared_ptr<Function>> GetFunction(const std::string& name) const;
/// \brief Return vector of all entry names in the registry.
///
/// Helpful for displaying a manifest of available functions.
std::vector<std::string> GetFunctionNames() const;
/// \brief Retrieve a function options type by name from the registry.
Result<const FunctionOptionsType*> GetFunctionOptionsType(
const std::string& name) const;
/// \brief The number of currently registered functions.
int num_functions() const;
/// \brief The cast function object registered in AddFunction.
///
/// Helpful for get cast function as needed.
const Function* cast_function() const;
private:
FunctionRegistry();
// Use PIMPL pattern to not have std::unordered_map here
class FunctionRegistryImpl;
std::unique_ptr<FunctionRegistryImpl> impl_;
explicit FunctionRegistry(FunctionRegistryImpl* impl);
};
} // namespace compute
} // namespace arrow20
|
