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// 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.
#include <sstream>
#include <utility>
#include "parquet/properties.h"
#include "arrow/io/buffered.h"
#include "arrow/io/memory.h"
#include "arrow/util/logging.h"
namespace parquet {
std::shared_ptr<ArrowInputStream> ReaderProperties::GetStream(
std::shared_ptr<ArrowInputFile> source, int64_t start, int64_t num_bytes) {
if (buffered_stream_enabled_) {
// ARROW-6180 / PARQUET-1636 Create isolated reader that references segment
// of source
std::shared_ptr<::arrow::io::InputStream> safe_stream =
::arrow::io::RandomAccessFile::GetStream(source, start, num_bytes);
PARQUET_ASSIGN_OR_THROW(
auto stream, ::arrow::io::BufferedInputStream::Create(buffer_size_, pool_,
safe_stream, num_bytes));
return std::move(stream);
} else {
PARQUET_ASSIGN_OR_THROW(auto data, source->ReadAt(start, num_bytes));
if (data->size() != num_bytes) {
std::stringstream ss;
ss << "Tried reading " << num_bytes << " bytes starting at position " << start
<< " from file but only got " << data->size();
throw ParquetException(ss.str());
}
return std::make_shared<::arrow::io::BufferReader>(data);
}
}
ArrowReaderProperties default_arrow_reader_properties() {
static ArrowReaderProperties default_reader_props;
return default_reader_props;
}
std::shared_ptr<ArrowWriterProperties> default_arrow_writer_properties() {
static std::shared_ptr<ArrowWriterProperties> default_writer_properties =
ArrowWriterProperties::Builder().build();
return default_writer_properties;
}
} // namespace parquet
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