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https://gitee.com/milvus-io/milvus.git
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87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "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, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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#pragma once
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#include <arrow/api.h>
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#include <arrow/io/interfaces.h>
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#include <parquet/arrow/writer.h>
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#include <parquet/arrow/reader.h>
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#include "ColumnType.h"
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namespace wrapper {
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class PayloadOutputStream;
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class PayloadInputStream;
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constexpr int EMPTY_DIMENSION = -1;
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struct PayloadWriter {
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ColumnType columnType;
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int dimension; // binary vector, float vector
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std::shared_ptr<arrow::ArrayBuilder> builder;
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std::shared_ptr<arrow::Schema> schema;
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std::shared_ptr<PayloadOutputStream> output;
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int rows;
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};
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struct PayloadReader {
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ColumnType column_type;
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std::shared_ptr<PayloadInputStream> input;
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std::unique_ptr<parquet::arrow::FileReader> reader;
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std::shared_ptr<arrow::Table> table;
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std::shared_ptr<arrow::ChunkedArray> column;
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std::shared_ptr<arrow::Array> array;
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bool *bValues;
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};
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class PayloadOutputStream : public arrow::io::OutputStream {
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public:
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PayloadOutputStream();
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~PayloadOutputStream();
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arrow::Status Close() override;
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arrow::Result<int64_t> Tell() const override;
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bool closed() const override;
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arrow::Status Write(const void *data, int64_t nbytes) override;
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arrow::Status Flush() override;
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public:
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const std::vector<uint8_t> &Buffer() const;
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private:
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std::vector<uint8_t> buffer_;
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bool closed_;
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};
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class PayloadInputStream : public arrow::io::RandomAccessFile {
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public:
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PayloadInputStream(const uint8_t *data, int64_t size);
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~PayloadInputStream();
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arrow::Status Close() override;
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arrow::Result<int64_t> Tell() const override;
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bool closed() const override;
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arrow::Status Seek(int64_t position) override;
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arrow::Result<int64_t> Read(int64_t nbytes, void *out) override;
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arrow::Result<std::shared_ptr<arrow::Buffer>> Read(int64_t nbytes) override;
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arrow::Result<int64_t> GetSize() override;
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private:
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const uint8_t *data_;
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const int64_t size_;
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int64_t tell_;
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bool closed_;
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};
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}
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