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132 lines (109 loc) · 4.37 KB
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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 "./arrow_types.h"
#if defined(ARROW_R_WITH_ARROW)
#include <arrow/ipc/reader.h>
#include <arrow/table.h>
// [[arrow::export]]
std::shared_ptr<arrow::Schema> RecordBatchReader__schema(
const std::shared_ptr<arrow::RecordBatchReader>& reader) {
return reader->schema();
}
// [[arrow::export]]
std::shared_ptr<arrow::RecordBatch> RecordBatchReader__ReadNext(
const std::shared_ptr<arrow::RecordBatchReader>& reader) {
std::shared_ptr<arrow::RecordBatch> batch;
StopIfNotOk(reader->ReadNext(&batch));
return batch;
}
// -------- RecordBatchStreamReader
// [[arrow::export]]
std::shared_ptr<arrow::RecordBatchReader> ipc___RecordBatchStreamReader__Open(
const std::shared_ptr<arrow::io::InputStream>& stream) {
std::shared_ptr<arrow::RecordBatchReader> reader;
return ValueOrStop(arrow::ipc::RecordBatchStreamReader::Open(stream));
}
// [[arrow::export]]
std::vector<std::shared_ptr<arrow::RecordBatch>> ipc___RecordBatchStreamReader__batches(
const std::shared_ptr<arrow::ipc::RecordBatchStreamReader>& reader) {
std::vector<std::shared_ptr<arrow::RecordBatch>> res;
while (true) {
std::shared_ptr<arrow::RecordBatch> batch;
StopIfNotOk(reader->ReadNext(&batch));
if (!batch) break;
res.push_back(batch);
}
return res;
}
// -------- RecordBatchFileReader
// [[arrow::export]]
std::shared_ptr<arrow::Schema> ipc___RecordBatchFileReader__schema(
const std::shared_ptr<arrow::ipc::RecordBatchFileReader>& reader) {
return reader->schema();
}
// [[arrow::export]]
int ipc___RecordBatchFileReader__num_record_batches(
const std::shared_ptr<arrow::ipc::RecordBatchFileReader>& reader) {
return reader->num_record_batches();
}
// [[arrow::export]]
std::shared_ptr<arrow::RecordBatch> ipc___RecordBatchFileReader__ReadRecordBatch(
const std::shared_ptr<arrow::ipc::RecordBatchFileReader>& reader, int i) {
if (i < 0 && i >= reader->num_record_batches()) {
Rcpp::stop("Record batch index out of bounds");
}
return ValueOrStop(reader->ReadRecordBatch(i));
}
// [[arrow::export]]
std::shared_ptr<arrow::ipc::RecordBatchFileReader> ipc___RecordBatchFileReader__Open(
const std::shared_ptr<arrow::io::RandomAccessFile>& file) {
std::shared_ptr<arrow::ipc::RecordBatchFileReader> reader;
return ValueOrStop(arrow::ipc::RecordBatchFileReader::Open(file));
}
// [[arrow::export]]
std::shared_ptr<arrow::Table> Table__from_RecordBatchFileReader(
const std::shared_ptr<arrow::ipc::RecordBatchFileReader>& reader) {
int num_batches = reader->num_record_batches();
std::vector<std::shared_ptr<arrow::RecordBatch>> batches(num_batches);
for (int i = 0; i < num_batches; i++) {
batches[i] = ValueOrStop(reader->ReadRecordBatch(i));
}
return ValueOrStop(arrow::Table::FromRecordBatches(std::move(batches)));
}
// [[arrow::export]]
std::shared_ptr<arrow::Table> Table__from_RecordBatchStreamReader(
const std::shared_ptr<arrow::ipc::RecordBatchStreamReader>& reader) {
std::shared_ptr<arrow::RecordBatch> batch;
std::vector<std::shared_ptr<arrow::RecordBatch>> batches;
while (true) {
StopIfNotOk(reader->ReadNext(&batch));
if (!batch) break;
batches.push_back(batch);
}
return ValueOrStop(arrow::Table::FromRecordBatches(std::move(batches)));
}
// [[arrow::export]]
std::vector<std::shared_ptr<arrow::RecordBatch>> ipc___RecordBatchFileReader__batches(
const std::shared_ptr<arrow::ipc::RecordBatchFileReader>& reader) {
auto n = reader->num_record_batches();
std::vector<std::shared_ptr<arrow::RecordBatch>> res(n);
for (int i = 0; i < n; i++) {
res[i] = ValueOrStop(reader->ReadRecordBatch(i));
}
return res;
}
#endif