rdblue commented on code in PR #12298: URL: https://github.com/apache/iceberg/pull/12298#discussion_r2717968450
########## core/src/main/java/org/apache/iceberg/avro/AvroFormatModel.java: ########## @@ -0,0 +1,259 @@ +/* + * 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.avro; + +import java.nio.ByteBuffer; +import java.util.Map; +import org.apache.avro.Schema; +import org.apache.avro.io.DatumReader; +import org.apache.avro.io.DatumWriter; +import org.apache.iceberg.FileContent; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.MetricsConfig; +import org.apache.iceberg.deletes.PositionDelete; +import org.apache.iceberg.encryption.EncryptedOutputFile; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.formats.BaseFormatModel; +import org.apache.iceberg.formats.ReadBuilder; +import org.apache.iceberg.formats.WriteBuilder; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.io.DeleteSchemaUtil; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; + +public class AvroFormatModel<D, S> + extends BaseFormatModel<D, S, DatumWriter<D>, DatumReader<D>, Schema> { + + public static AvroFormatModel<PositionDelete, Object> forDelete() { + return new AvroFormatModel<>(PositionDelete.class, null, null, null); + } + + public static <D, S> AvroFormatModel<D, S> create( + Class<D> type, + Class<S> schemaType, + WriterFunction<DatumWriter<D>, S, Schema> writerFunction, + ReaderFunction<DatumReader<D>, S, Schema> readerFunction) { + return new AvroFormatModel<>(type, schemaType, writerFunction, readerFunction); + } + + private AvroFormatModel( + Class<D> type, + Class<S> schemaType, + WriterFunction<DatumWriter<D>, S, Schema> writerFunction, + ReaderFunction<DatumReader<D>, S, Schema> readerFunction) { + super(type, schemaType, writerFunction, readerFunction); + } + + @Override + public FileFormat format() { + return FileFormat.AVRO; + } + + @Override + public WriteBuilder<D, S> writeBuilder(EncryptedOutputFile outputFile) { + return new WriteBuilderWrapper<>(outputFile, writerFunction()); + } + + @Override + public ReadBuilder<D, S> readBuilder(InputFile inputFile) { + return new ReadBuilderWrapper<>(inputFile, readerFunction()); + } + + private static class WriteBuilderWrapper<D, S> implements WriteBuilder<D, S> { + private final Avro.WriteBuilder internal; + private final WriterFunction<DatumWriter<D>, S, Schema> writerFunction; + private S inputSchema; + private FileContent content; + + private WriteBuilderWrapper( + EncryptedOutputFile outputFile, WriterFunction<DatumWriter<D>, S, Schema> writerFunction) { + this.internal = Avro.write(outputFile.encryptingOutputFile()); + this.writerFunction = writerFunction; + } + + @Override + public WriteBuilder<D, S> schema(org.apache.iceberg.Schema schema) { + internal.schema(schema); + return this; + } + + @Override + public WriteBuilder<D, S> inputSchema(S schema) { + this.inputSchema = schema; + return this; + } + + @Override + public WriteBuilder<D, S> set(String property, String value) { + internal.set(property, value); + return this; + } + + @Override + public WriteBuilder<D, S> setAll(Map<String, String> properties) { + internal.setAll(properties); + return this; + } + + @Override + public WriteBuilder<D, S> meta(String property, String value) { + internal.meta(property, value); + return this; + } + + @Override + public WriteBuilder<D, S> meta(Map<String, String> properties) { + internal.meta(properties); + return this; + } + + @Override + public WriteBuilder<D, S> content(FileContent newContent) { + this.content = newContent; + return this; + } + + @Override + public WriteBuilder<D, S> metricsConfig(MetricsConfig metricsConfig) { + internal.metricsConfig(metricsConfig); + return this; + } + + @Override + public WriteBuilder<D, S> overwrite() { + internal.overwrite(); + return this; + } + + @Override + public WriteBuilder<D, S> withFileEncryptionKey(ByteBuffer encryptionKey) { + throw new UnsupportedOperationException("Avro does not support file encryption keys"); + } + + @Override + public WriteBuilder<D, S> withAADPrefix(ByteBuffer aadPrefix) { + throw new UnsupportedOperationException("Avro does not support AAD prefix"); + } + + @Override + public org.apache.iceberg.io.FileAppender<D> build() throws java.io.IOException { + switch (content) { + case DATA: + internal.createContextFunc(Avro.WriteBuilder.Context::dataContext); + internal.createWriterFunc( + avroSchema -> writerFunction.write(null, avroSchema, inputSchema)); + break; + case EQUALITY_DELETES: + internal.createContextFunc(Avro.WriteBuilder.Context::deleteContext); + internal.createWriterFunc( + avroSchema -> writerFunction.write(null, avroSchema, inputSchema)); + break; + case POSITION_DELETES: + internal.createContextFunc(Avro.WriteBuilder.Context::deleteContext); + internal.createWriterFunc(unused -> new Avro.PositionDatumWriter()); + internal.schema(DeleteSchemaUtil.pathPosSchema()); + break; + default: + throw new IllegalArgumentException("Unknown file content: " + content); + } + + return internal.build(); + } + } + + private static class ReadBuilderWrapper<D, S> implements ReadBuilder<D, S> { + private final Avro.ReadBuilder internal; + private final ReaderFunction<DatumReader<D>, S, Schema> readerFunction; + private S engineSchema; + private Map<Integer, ?> idToConstant = ImmutableMap.of(); + + private ReadBuilderWrapper( + InputFile inputFile, ReaderFunction<DatumReader<D>, S, Schema> readerFunction) { + this.internal = Avro.read(inputFile); + this.readerFunction = readerFunction; + } + + @Override + public ReadBuilder<D, S> split(long newStart, long newLength) { + internal.split(newStart, newLength); + return this; + } + + @Override + public ReadBuilder<D, S> project(org.apache.iceberg.Schema schema) { + internal.project(schema); + return this; + } + + @Override + public ReadBuilder<D, S> outputSchema(S schema) { + this.engineSchema = schema; + return this; + } + + @Override + public ReadBuilder<D, S> caseSensitive(boolean caseSensitive) { + // Filtering is not supported in Avro reader, so case sensitivity does not matter + return this; + } + + @Override + public ReadBuilder<D, S> filter(Expression filter) { + // Filtering is not supported in Avro reader Review Comment: Minor: update comment to note that this is not an exception because filtering best effort and is not required. -- This is an automated message from the Apache Git Service. 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