src/paimon/format/orc/orc_reader_builder.h

/*
 * 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 <map>
#include <memory>
#include <string>
#include <utility>

#include "paimon/common/utils/options_utils.h"
#include "paimon/format/orc/orc_file_batch_reader.h"
#include "paimon/format/orc/orc_format_defs.h"
#include "paimon/format/orc/orc_input_stream_impl.h"
#include "paimon/format/reader_builder.h"
#include "paimon/fs/file_system.h"
namespace paimon::orc {
class OrcReaderBuilder : public ReaderBuilder {
 public:
    OrcReaderBuilder(const std::map<std::string, std::string>& options, int32_t batch_size)
        : batch_size_(batch_size),
          read_memory_(std::make_shared<OrcReadMemory>(GetDefaultPool())),
          options_(options) {}

    ReaderBuilder* WithMemoryPool(const std::shared_ptr<MemoryPool>& pool) override {
        if (pool == nullptr) {
            read_memory_.reset();
        } else {
            read_memory_ = std::make_shared<OrcReadMemory>(pool);
        }
        return this;
    }

    Result<std::unique_ptr<FileBatchReader>> Build(
        const std::shared_ptr<InputStream>& path) const override {
        if (read_memory_ == nullptr) {
            return Status::Invalid("ORC reader memory pool is nullptr");
        }
        PAIMON_ASSIGN_OR_RAISE(uint64_t natural_read_size,
                               OptionsUtils::GetValueFromMap<uint64_t>(
                                   options_, ORC_NATURAL_READ_SIZE, DEFAULT_NATURAL_READ_SIZE));
        if (natural_read_size == 0) {
            return Status::Invalid("natural read size should be greater than zero");
        }

        PAIMON_ASSIGN_OR_RAISE(std::unique_ptr<OrcInputStreamImpl> input_stream,
                               OrcInputStreamImpl::Create(path, natural_read_size));
        return OrcFileBatchReader::Create(std::move(input_stream), read_memory_, options_,
                                          batch_size_);
    }

 private:
    int32_t batch_size_ = -1;
    std::shared_ptr<OrcReadMemory> read_memory_;
    std::map<std::string, std::string> options_;
};
}  // namespace paimon::orc