phet commented on code in PR #4058: URL: https://github.com/apache/gobblin/pull/4058#discussion_r1793916814
########## gobblin-data-management/src/main/java/org/apache/gobblin/data/management/copy/iceberg/predicates/IcebergPartitionFilterPredicateUtil.java: ########## @@ -0,0 +1,71 @@ +/* + * 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.gobblin.data.management.copy.iceberg.predicates; + +import java.util.List; + +import org.apache.iceberg.PartitionField; +import org.apache.iceberg.TableMetadata; + +/** + * Utility class for creating and managing partition filter predicates for Iceberg tables. + * <p> + * This class provides methods to retrieve the index of a partition column in the table metadata + * and ensures that the partition transform is supported. + * </p> + * <p> + * Note: This class is not meant to be instantiated. + * </p> + */ +public class IcebergPartitionFilterPredicateUtil { + private IcebergPartitionFilterPredicateUtil() { + } + + /** + * Retrieves the index of the partition column from the partition spec in the table metadata. + * + * @param partitionColumnName the name of the partition column to find + * @param tableMetadata the metadata of the Iceberg table + * @param supportedTransforms a list of supported partition transforms + * @return the index of the partition column if found, otherwise -1 + * @throws IllegalArgumentException if the partition transform is not supported + */ + public static int getPartitionColumnIndex( + String partitionColumnName, + TableMetadata tableMetadata, + List<String> supportedTransforms + ) { + List<PartitionField> partitionFields = tableMetadata.spec().fields(); + for (int idx = 0; idx < partitionFields.size(); idx++) { + PartitionField partitionField = partitionFields.get(idx); + if (partitionField.name().equals(partitionColumnName)) { + String transform = partitionField.transform().toString().toLowerCase(); + if (!supportedTransforms.contains(transform)) { + throw new IllegalArgumentException( Review Comment: this doesn't seem like an illegal arg situation, since what the caller provided is their choice, but here we're throwing because we found the table did not match what they asked for -- 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: dev-unsubscr...@gobblin.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
