pvary commented on code in PR #12774: URL: https://github.com/apache/iceberg/pull/12774#discussion_r2065986466
########## data/src/main/java/org/apache/iceberg/data/ObjectModelRegistry.java: ########## @@ -0,0 +1,224 @@ +/* + * 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.data; + +import java.util.List; +import java.util.Map; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.common.DynMethods; +import org.apache.iceberg.encryption.EncryptedOutputFile; +import org.apache.iceberg.io.AppenderBuilder; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.io.ObjectModel; +import org.apache.iceberg.io.ReadBuilder; +import org.apache.iceberg.relocated.com.google.common.base.MoreObjects; +import org.apache.iceberg.relocated.com.google.common.base.Objects; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Registry which provides the available {@link ReadBuilder}s and writer builders ({@link + * org.apache.iceberg.data.AppenderBuilder}, {@link DataWriterBuilder}, {@link + * EqualityDeleteWriterBuilder}, {@link PositionDeleteWriterBuilder}). Based on the `file format` + * and the requested `object model name` the registry returns the correct reader and writer + * builders. These builders could be used to generate the readers and writers. + * + * <p>The available {@link ObjectModel}s are registered by the {@link + * #registerObjectModel(ObjectModel)} method. These {@link ObjectModel}s will be used to create the + * {@link ReadBuilder}s and the {@link AppenderBuilder}s. The former ones are returned directly, the + * later ones are wrapped in the appropriate writer builder implementations. + */ +public final class ObjectModelRegistry { + private static final Logger LOG = LoggerFactory.getLogger(ObjectModelRegistry.class); + // The list of classes which are used for registering the reader and writer builders + private static final List<String> CLASSES_TO_REGISTER = ImmutableList.of(); + + private static final Map<Key, ObjectModel<?>> OBJECT_MODELS = Maps.newConcurrentMap(); + + /** + * Registers a new object model. + * + * @param objectModel the object model + * @throws IllegalArgumentException if an object model for the given {@code format} and {@code + * objectModelName} combination already exists + */ + @SuppressWarnings("CatchBlockLogException") + public static void registerObjectModel(ObjectModel<?> objectModel) { Review Comment: @danielcweeks and @rdblue specifically asked for harder guardrails around registering object models. This check prevents users to accidentally overwrite embedded object models. If the community has consensus around changing this behavior, I'm happy to do either way. -- 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
