| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hadoop.hive.metastore; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.metastore.api.EnvironmentContext; |
| import org.apache.hadoop.hive.metastore.api.FieldSchema; |
| import org.apache.hadoop.hive.metastore.api.MetaException; |
| import org.apache.hadoop.hive.metastore.api.Table; |
| |
| import java.util.List; |
| |
| /** |
| * An interface to implement reading schemas from stored data. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| interface StorageSchemaReader { |
| /** |
| * Read the schema from the storage representation of the table. |
| * @param tbl metastore table object |
| * @param envContext environment context |
| * @param conf current configuration file |
| * @return list of field schemas |
| * @throws MetaException if the table storage could not be read |
| */ |
| List<FieldSchema> readSchema(Table tbl, EnvironmentContext envContext, Configuration conf) |
| throws MetaException; |
| } |
