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#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 <algorithm>
#include <cstdint>
#include <deque>
#include <functional>
#include <memory>
#include <unordered_set>
#include <utility>
#include <vector>
#include "contrib/libs/apache/arrow_next/cpp/src/parquet/arrow/schema.h"
#include "contrib/libs/apache/arrow_next/cpp/src/parquet/column_reader.h"
#include "contrib/libs/apache/arrow_next/cpp/src/parquet/file_reader.h"
#include "contrib/libs/apache/arrow_next/cpp/src/parquet/metadata.h"
#include "contrib/libs/apache/arrow_next/cpp/src/parquet/platform.h"
#include "contrib/libs/apache/arrow_next/cpp/src/parquet/schema.h"
namespace arrow20 {
class Array;
class ChunkedArray;
class DataType;
class Field;
class KeyValueMetadata;
class Schema;
} // namespace arrow20
using arrow20::Status;
namespace parquet20 {
class ArrowReaderProperties;
namespace arrow20 {
class ColumnReaderImpl;
// ----------------------------------------------------------------------
// Iteration utilities
// Abstraction to decouple row group iteration details from the ColumnReader,
// so we can read only a single row group if we want
class FileColumnIterator {
public:
explicit FileColumnIterator(int column_index, ParquetFileReader* reader,
std::vector<int> row_groups)
: column_index_(column_index),
reader_(reader),
schema_(reader->metadata()->schema()),
row_groups_(row_groups.begin(), row_groups.end()),
row_group_index_(-1) {}
virtual ~FileColumnIterator() {}
std::unique_ptr<::parquet20::PageReader> NextChunk() {
if (row_groups_.empty()) {
return nullptr;
}
row_group_index_ = row_groups_.front();
auto row_group_reader = reader_->RowGroup(row_group_index_);
row_groups_.pop_front();
return row_group_reader->GetColumnPageReader(column_index_);
}
const SchemaDescriptor* schema() const { return schema_; }
const ColumnDescriptor* descr() const { return schema_->Column(column_index_); }
std::shared_ptr<FileMetaData> metadata() const { return reader_->metadata(); }
std::unique_ptr<RowGroupMetaData> row_group_metadata() const {
return metadata()->RowGroup(row_group_index_);
}
std::unique_ptr<ColumnChunkMetaData> column_chunk_metadata() const {
return row_group_metadata()->ColumnChunk(column_index_);
}
int column_index() const { return column_index_; }
int row_group_index() const { return row_group_index_; }
protected:
int column_index_;
ParquetFileReader* reader_;
const SchemaDescriptor* schema_;
std::deque<int> row_groups_;
int row_group_index_;
};
using FileColumnIteratorFactory =
std::function<FileColumnIterator*(int, ParquetFileReader*)>;
struct ReaderContext {
ParquetFileReader* reader;
::arrow20::MemoryPool* pool;
FileColumnIteratorFactory iterator_factory;
bool filter_leaves;
std::shared_ptr<std::unordered_set<int>> included_leaves;
ArrowReaderProperties* reader_properties;
bool IncludesLeaf(int leaf_index) const {
if (this->filter_leaves) {
return this->included_leaves->find(leaf_index) != this->included_leaves->end();
}
return true;
}
};
Status TransferColumnData(::parquet20::internal::RecordReader* reader,
std::unique_ptr<::parquet20::ColumnChunkMetaData> metadata,
const std::shared_ptr<::arrow20::Field>& value_field,
const ColumnDescriptor* descr, const ReaderContext* ctx,
std::shared_ptr<::arrow20::ChunkedArray>* out);
} // namespace arrow20
} // namespace parquet20
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