arrow_stream_to_file/arrow-stream-to-file.rs
1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements. See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership. The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License. You may obtain a copy of the License at
8//
9// http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied. See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18//! Converts an Arrow IPC stream to an Arrow IPC file.
19
20use std::io;
21
22use arrow::error::Result;
23use arrow::ipc::reader::StreamReader;
24use arrow::ipc::writer::FileWriter;
25
26fn main() -> Result<()> {
27 let mut arrow_stream_reader = StreamReader::try_new(io::stdin(), None)?;
28 let schema = arrow_stream_reader.schema();
29
30 let mut writer = FileWriter::try_new(io::stdout(), &schema)?;
31
32 arrow_stream_reader.try_for_each(|batch| writer.write(&batch?))?;
33 writer.finish()?;
34
35 Ok(())
36}