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62 lines
2.5 KiB
C++
62 lines
2.5 KiB
C++
// Licensed to the LF AI & Data foundation 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "storage/PayloadReader.h"
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#include "exceptions/EasyAssert.h"
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#include "storage/FieldDataFactory.h"
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#include "storage/Util.h"
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namespace milvus::storage {
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PayloadReader::PayloadReader(std::shared_ptr<PayloadInputStream> input,
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DataType data_type)
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: column_type_(data_type) {
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init(input);
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}
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PayloadReader::PayloadReader(const uint8_t* data,
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int length,
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DataType data_type)
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: column_type_(data_type) {
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auto input = std::make_shared<storage::PayloadInputStream>(data, length);
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init(input);
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}
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void
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PayloadReader::init(std::shared_ptr<PayloadInputStream> input) {
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auto mem_pool = arrow::default_memory_pool();
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// TODO :: Stream read file data, avoid copying
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std::unique_ptr<parquet::arrow::FileReader> reader;
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auto st = parquet::arrow::OpenFile(input, mem_pool, &reader);
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AssertInfo(st.ok(), "failed to get arrow file reader");
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std::shared_ptr<arrow::Table> table;
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st = reader->ReadTable(&table);
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AssertInfo(st.ok(), "failed to get reader data to arrow table");
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auto column = table->column(0);
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AssertInfo(column != nullptr, "returned arrow column is null");
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AssertInfo(column->chunks().size() == 1,
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"arrow chunk size in arrow column should be 1");
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auto array = column->chunk(0);
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AssertInfo(array != nullptr, "empty arrow array of PayloadReader");
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dim_ = datatype_is_vector(column_type_)
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? GetDimensionFromArrowArray(array, column_type_)
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: 1;
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field_data_ =
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FieldDataFactory::GetInstance().CreateFieldData(column_type_, dim_);
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field_data_->FillFieldData(array);
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}
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} // namespace milvus::storage
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