ozankabak commented on code in PR #14224: URL: https://github.com/apache/datafusion/pull/14224#discussion_r1943608331
########## datafusion/core/src/datasource/data_source.rs: ########## @@ -0,0 +1,264 @@ +// 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. + +//! DataSource and FileSource trait implementations + +use std::any::Any; +use std::fmt; +use std::fmt::Formatter; +use std::sync::Arc; + +use crate::datasource::listing::PartitionedFile; +use crate::datasource::physical_plan::{ + FileGroupPartitioner, FileOpener, FileScanConfig, FileStream, +}; + +use arrow_schema::SchemaRef; +use datafusion_common::Statistics; +use datafusion_execution::{SendableRecordBatchStream, TaskContext}; +use datafusion_physical_expr::{EquivalenceProperties, Partitioning}; +use datafusion_physical_expr_common::sort_expr::LexOrdering; +use datafusion_physical_plan::metrics::ExecutionPlanMetricsSet; +use datafusion_physical_plan::source::{DataSource, DataSourceExec}; +use datafusion_physical_plan::{DisplayAs, DisplayFormatType}; + +use object_store::ObjectStore; + +/// Common behaviors that every `FileSourceConfig` needs to implement. +pub trait FileSource: Send + Sync { + /// Creates a `dyn FileOpener` based on given parameters + fn create_file_opener( + &self, + object_store: datafusion_common::Result<Arc<dyn ObjectStore>>, + base_config: &FileScanConfig, + partition: usize, + ) -> datafusion_common::Result<Arc<dyn FileOpener>>; + /// Any + fn as_any(&self) -> &dyn Any; + /// Initialize new type with batch size configuration + fn with_batch_size(&self, batch_size: usize) -> Arc<dyn FileSource>; + /// Initialize new instance with a new schema + fn with_schema(&self, schema: SchemaRef) -> Arc<dyn FileSource>; + /// Initialize new instance with projection information + fn with_projection(&self, config: &FileScanConfig) -> Arc<dyn FileSource>; + /// Initialize new instance with projected statistics + fn with_statistics(&self, statistics: Statistics) -> Arc<dyn FileSource>; + /// Return execution plan metrics + fn metrics(&self) -> &ExecutionPlanMetricsSet; + /// Return projected statistics + fn statistics(&self) -> datafusion_common::Result<Statistics>; + /// Returns the file type such as Arrow, Avro, Parquet, ... + fn file_type(&self) -> FileType; + /// Format FileType specific information + fn fmt_extra(&self, _t: DisplayFormatType, _f: &mut Formatter) -> fmt::Result { + Ok(()) + } +} + +/// Determines file types Review Comment: Let's create a ticket and address this with a quick follow-on to enable extensibility 🚀 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
