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
|
#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.
#pragma once
#include <cstdint>
#include <memory>
#include <utility>
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/result.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/type_fwd.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/util/type_fwd.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/util/visibility.h"
namespace arrow20 {
namespace csv {
class BlockParser;
struct ConvertOptions;
class ARROW_EXPORT ColumnBuilder {
public:
virtual ~ColumnBuilder() = default;
/// Spawn a task that will try to convert and append the given CSV block.
/// All calls to Append() should happen on the same thread, otherwise
/// call Insert() instead.
virtual void Append(const std::shared_ptr<BlockParser>& parser) = 0;
/// Spawn a task that will try to convert and insert the given CSV block
virtual void Insert(int64_t block_index,
const std::shared_ptr<BlockParser>& parser) = 0;
/// Return the final chunked array. The TaskGroup _must_ have finished!
virtual Result<std::shared_ptr<ChunkedArray>> Finish() = 0;
std::shared_ptr<arrow20::internal::TaskGroup> task_group() { return task_group_; }
/// Construct a strictly-typed ColumnBuilder.
static Result<std::shared_ptr<ColumnBuilder>> Make(
MemoryPool* pool, const std::shared_ptr<DataType>& type, int32_t col_index,
const ConvertOptions& options,
const std::shared_ptr<arrow20::internal::TaskGroup>& task_group);
/// Construct a type-inferring ColumnBuilder.
static Result<std::shared_ptr<ColumnBuilder>> Make(
MemoryPool* pool, int32_t col_index, const ConvertOptions& options,
const std::shared_ptr<arrow20::internal::TaskGroup>& task_group);
/// Construct a ColumnBuilder for a column of nulls
/// (i.e. not present in the CSV file).
static Result<std::shared_ptr<ColumnBuilder>> MakeNull(
MemoryPool* pool, const std::shared_ptr<DataType>& type,
const std::shared_ptr<arrow20::internal::TaskGroup>& task_group);
protected:
explicit ColumnBuilder(std::shared_ptr<arrow20::internal::TaskGroup> task_group)
: task_group_(std::move(task_group)) {}
std::shared_ptr<arrow20::internal::TaskGroup> task_group_;
};
} // namespace csv
} // namespace arrow20
|
