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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.
//! This module contains utilities to manipulate avro metadata.
#[cfg(feature = "avro")]
mod arrow_array_reader;
#[cfg(feature = "avro")]
mod reader;
#[cfg(feature = "avro")]
mod schema;
use crate::arrow::datatypes::Schema;
use crate::error::Result;
#[cfg(feature = "avro")]
pub use reader::{Reader, ReaderBuilder};
use std::io::Read;
#[cfg(feature = "avro")]
/// Read Avro schema given a reader
pub fn read_avro_schema_from_reader<R: Read>(reader: &mut R) -> Result<Schema> {
let avro_reader = apache_avro::Reader::new(reader)?;
let schema = avro_reader.writer_schema();
schema::to_arrow_schema(schema)
}
#[cfg(not(feature = "avro"))]
/// Read Avro schema given a reader (requires the avro feature)
pub fn read_avro_schema_from_reader<R: Read>(_: &mut R) -> Result<Schema> {
Err(crate::error::DataFusionError::NotImplemented(
"cannot read avro schema without the 'avro' feature enabled".to_string(),
))
}