rdblue commented on code in PR #7392: URL: https://github.com/apache/iceberg/pull/7392#discussion_r1199221178
########## core/src/main/java/org/apache/iceberg/avro/NameMappingWithAvroSchema.java: ########## @@ -0,0 +1,119 @@ +/* + * 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.util.List; +import org.apache.avro.Schema; +import org.apache.iceberg.mapping.MappedField; +import org.apache.iceberg.mapping.MappedFields; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.types.Type; +import org.apache.iceberg.types.Types; + +public class NameMappingWithAvroSchema extends AvroSchemaWithDerivedTypeVisitor<MappedFields> { + + @Override + public MappedFields record( + Types.StructType iStruct, + Schema record, + List<String> names, + List<MappedFields> fieldResults) { + List<MappedField> fields = Lists.newArrayListWithExpectedSize(fieldResults.size()); + + for (int i = 0; i < fieldResults.size(); i += 1) { + Types.NestedField field = iStruct.fields().get(i); + MappedFields result = fieldResults.get(i); + fields.add(MappedField.of(field.fieldId(), field.name(), result)); + } + + return MappedFields.of(fields); + } + + @Override + public MappedFields union(Type iType, Schema union, List<MappedFields> optionResults) { + if (AvroSchemaUtil.isOptionSchema(union)) { + for (int i = 0; i < optionResults.size(); i += 1) { + if (union.getTypes().get(i).getType() != Schema.Type.NULL) { + return optionResults.get(i); + } + } + } else { // Complex union + Preconditions.checkArgument( + iType instanceof Types.StructType, + "Cannot visit invalid Iceberg type: %s for Avro complex union type: %s", + iType, + union); + Types.StructType iStruct = (Types.StructType) iType; + List<MappedField> fields = Lists.newArrayListWithExpectedSize(optionResults.size()); + int index = 0; + for (Schema option : union.getTypes()) { + if (option.getType() != Schema.Type.NULL) { + // Check if current option is a named type, i.e., a RECORD, ENUM, or FIXED type. If so, + // use the full record name of the Avro type as the field name. Otherwise, use the Avro + // type toString(). + if (option.getType() == Schema.Type.RECORD + || option.getType() == Schema.Type.ENUM + || option.getType() == Schema.Type.FIXED) { + fields.add( + MappedField.of( + iStruct.fields().get(index).fieldId(), + option.getFullName(), Review Comment: Conflicting short names are extremely unlikely, so we shouldn't worry about it. But using a short name is really useful for unrelated code modifications. For example, if you've moved a class in your project between packages, you don't want to have to go update the mapping by hand. -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
