pvary commented on code in PR #12774: URL: https://github.com/apache/iceberg/pull/12774#discussion_r2100272067
########## core/src/main/java/org/apache/iceberg/io/WriteBuilder.java: ########## @@ -0,0 +1,120 @@ +/* + * 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. + */ +package org.apache.iceberg.io; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Map; +import org.apache.iceberg.FileContent; +import org.apache.iceberg.MetricsConfig; +import org.apache.iceberg.Schema; + +/** + * Builder interface for creating file writers across supported data file formats. Each {@link + * FileAccessFactory} implementation provides appropriate {@link WriteBuilder} instances based on: + * + * <ul> + * <li>target file format (Parquet, Avro, ORC) + * <li>engine-specific object representation (spark, flink, generic, etc.) + * <li>content type ({@link FileContent#DATA}, {@link FileContent#EQUALITY_DELETES}, {@link + * FileContent#POSITION_DELETES}) + * </ul> + * + * The {@link WriteBuilder} follows the builder pattern to configure and create {@link FileAppender} + * instances that write data to the target output files. + * + * @param <B> the concrete builder type for method chaining + * @param <E> engine-specific schema type for the input data records + */ +public interface WriteBuilder<B extends WriteBuilder<B, E>, E> { + /** Set the file schema. */ Review Comment: Actually the `WriteBuilder` has this responsibility. The file format specific code converts the Iceberg schema to the file format specific schema. In many cases (not in Avro) the file format specific schema is passed to the engine specific code and use as a base for conversion. -- 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: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
