rdblue commented on code in PR #12774: URL: https://github.com/apache/iceberg/pull/12774#discussion_r2775171120
########## core/src/main/java/org/apache/iceberg/formats/FileWriterBuilder.java: ########## @@ -0,0 +1,158 @@ +/* + * 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.formats; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.List; +import java.util.Map; +import org.apache.iceberg.MetricsConfig; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.SortOrder; +import org.apache.iceberg.StructLike; +import org.apache.iceberg.deletes.EqualityDeleteWriter; +import org.apache.iceberg.deletes.PositionDeleteWriter; +import org.apache.iceberg.encryption.EncryptionKeyMetadata; +import org.apache.iceberg.io.DataWriter; +import org.apache.iceberg.io.FileWriter; +import org.apache.iceberg.util.ArrayUtil; + +/** + * A generic builder interface for creating specialized file writers in the Iceberg ecosystem. + * + * <p>This builder provides a unified configuration API for generating various types of content + * writers: + * + * <ul> + * <li>{@link DataWriter} for creating data files with table records + * <li>{@link EqualityDeleteWriter} for creating files with equality-based delete records + * <li>{@link PositionDeleteWriter} for creating files with position-based delete records + * </ul> + * + * <p>Each concrete implementation configures the underlying file format writer while adding + * content-specific metadata and behaviors. + * + * @param <W> the concrete writer type the builder produces + * @param <S> the type of the schema for the input data + */ +public interface FileWriterBuilder<W extends FileWriter<?, ?>, S> { + + /** + * Set a writer configuration property which affects the writer behavior. + * + * @param property a writer config property name + * @param value config value + * @return this for method chaining + */ + FileWriterBuilder<W, S> set(String property, String value); + + /** + * Adds the new properties to the writer configuration. + * + * @param properties a map of writer config properties + * @return this for method chaining + */ + default FileWriterBuilder<W, S> setAll(Map<String, String> properties) { + properties.forEach(this::set); + return this; + } + + /** + * Set a file metadata property in the created file. + * + * @param property a file metadata property name + * @param value config value + * @return this for method chaining + */ + FileWriterBuilder<W, S> meta(String property, String value); + + /** + * Add the new properties to file metadata for the created file. + * + * @param properties a map of file metadata properties + * @return this for method chaining + */ + default FileWriterBuilder<W, S> meta(Map<String, String> properties) { + properties.forEach(this::meta); + return this; + } + + /** Sets the metrics configuration used for collecting column metrics for the created file. */ + FileWriterBuilder<W, S> metricsConfig(MetricsConfig metricsConfig); + + /** Overwrite the file if it already exists. By default, overwrite is disabled. */ + FileWriterBuilder<W, S> overwrite(); + + /** + * Sets the encryption key used for writing the file. If the writer does not support encryption, + * then an exception should be thrown. + */ + FileWriterBuilder<W, S> withFileEncryptionKey(ByteBuffer encryptionKey); + + /** + * Sets the additional authentication data (AAD) prefix used for writing the file. If the writer + * does not support encryption, then an exception should be thrown. + */ + FileWriterBuilder<W, S> withAADPrefix(ByteBuffer aadPrefix); + + /** Sets the partition specification for the Iceberg metadata. */ + FileWriterBuilder<W, S> spec(PartitionSpec newSpec); + + /** Sets the partition value for the Iceberg metadata. */ + FileWriterBuilder<W, S> partition(StructLike partition); + + /** Sets the encryption key metadata for Iceberg metadata. */ + FileWriterBuilder<W, S> keyMetadata(EncryptionKeyMetadata keyMetadata); + + /** Sets the sort order for the Iceberg metadata. */ + FileWriterBuilder<W, S> sortOrder(SortOrder sortOrder); + + /** Set the file schema. */ + FileWriterBuilder<W, S> schema(Schema schema); + + /** + * Sets the engine's representation accepted by the writer. Review Comment: This is a little unclear; I'd prefer "Sets the engine-specific schema that describes records accepted by the writer". -- This is an automated message from the Apache Git Service. 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