header was too commented, renamed to parquet.cpp

Author: romainfrancois

r/src/parquet.cpp

@@ -0,0 +1,37 @@
+// 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/api.h>
+#include <arrow/io/api.h>
+#include <parquet/arrow/reader.h>
+#include <parquet/arrow/writer.h>
+#include <parquet/exception.h>
+
+// [[Rcpp::export]]
+std::shared_ptr<arrow::Table> read_parquet_file(std::string filename) {
+  std::shared_ptr<arrow::io::ReadableFile> infile;
+  PARQUET_THROW_NOT_OK(
+      arrow::io::ReadableFile::Open(filename, arrow::default_memory_pool(), &infile));
+
+  std::unique_ptr<parquet::arrow::FileReader> reader;
+  PARQUET_THROW_NOT_OK(
+      parquet::arrow::OpenFile(infile, arrow::default_memory_pool(), &reader));
+  std::shared_ptr<arrow::Table> table;
+  PARQUET_THROW_NOT_OK(reader->ReadTable(&table));
+
+  return table;
+}