| /* |
| * 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.drill.metastore.rdbms.transform; |
| |
| import org.apache.drill.metastore.metadata.MetadataType; |
| import org.apache.drill.metastore.rdbms.exception.RdbmsMetastoreException; |
| import org.apache.drill.metastore.rdbms.operate.RdbmsOperation; |
| import org.jooq.Condition; |
| import org.jooq.Record; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Abstract implementation of {@link Transformer} interface which contains |
| * common code for all Metastore component metadata types. |
| * |
| * @param <T> Metastore component metadata type |
| */ |
| public abstract class AbstractTransformer<T> implements Transformer<T> { |
| |
| @Override |
| public List<RdbmsOperation.Delete> toDelete(org.apache.drill.metastore.operate.Delete delete) { |
| Set<MetadataMapper<T, ? extends Record>> mappers = toMappers(delete.metadataTypes()); |
| return mappers.stream() |
| .map(mapper -> new RdbmsOperation.Delete(mapper.table(), mapper.toCondition(delete.filter()))) |
| .collect(Collectors.toList()); |
| } |
| |
| @Override |
| public List<RdbmsOperation.Delete> toDeleteAll() { |
| Set<MetadataMapper<T, ? extends Record>> mappers = toMappers(Collections.singleton(MetadataType.ALL)); |
| return mappers.stream() |
| .map(MetadataMapper::table) |
| .map(RdbmsOperation.Delete::new) |
| .collect(Collectors.toList()); |
| } |
| |
| protected RdbmsOperation.Overwrite toOverwrite(String metadataTypeString, List<T> units) { |
| MetadataType metadataType = MetadataType.fromValue(metadataTypeString); |
| if (metadataType == null) { |
| throw new RdbmsMetastoreException("Metadata type must be specified during insert / update"); |
| } else { |
| MetadataMapper<T, ? extends Record> mapper = toMapper(metadataType); |
| |
| List<Condition> deleteConditions = mapper.toDeleteConditions(units); |
| |
| List<? extends Record> records = units.stream() |
| .map(mapper::toRecord) |
| .collect(Collectors.toList()); |
| |
| return new RdbmsOperation.Overwrite(mapper.table(), deleteConditions, records); |
| } |
| } |
| } |