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69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <memory>
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#include <vector>
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#include "arrow/status.h"
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#include "arrow/type_fwd.h"
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#include "arrow/util/type_fwd.h"
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#include "arrow/util/visibility.h"
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namespace arrow {
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namespace json {
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class PromotionGraph;
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class ARROW_EXPORT ChunkedArrayBuilder {
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public:
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virtual ~ChunkedArrayBuilder() = default;
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/// Spawn a task that will try to convert and insert the given JSON block
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virtual void Insert(int64_t block_index,
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const std::shared_ptr<Field>& unconverted_field,
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const std::shared_ptr<Array>& unconverted) = 0;
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/// Return the final chunked array.
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/// Every chunk must be inserted before this is called!
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virtual Status Finish(std::shared_ptr<ChunkedArray>* out) = 0;
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/// Finish current task group and substitute a new one
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virtual Status ReplaceTaskGroup(
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const std::shared_ptr<arrow::internal::TaskGroup>& task_group) = 0;
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protected:
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explicit ChunkedArrayBuilder(
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const std::shared_ptr<arrow::internal::TaskGroup>& task_group)
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: task_group_(task_group) {}
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std::shared_ptr<arrow::internal::TaskGroup> task_group_;
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};
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/// create a chunked builder
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///
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/// if unexpected fields and promotion need to be handled, promotion_graph must be
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/// non-null
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ARROW_EXPORT Status MakeChunkedArrayBuilder(
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const std::shared_ptr<arrow::internal::TaskGroup>& task_group, MemoryPool* pool,
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const PromotionGraph* promotion_graph, const std::shared_ptr<DataType>& type,
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std::shared_ptr<ChunkedArrayBuilder>* out);
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} // namespace json
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} // namespace arrow
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