| // 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.impala.catalog; |
| |
| import org.apache.impala.thrift.TCatalogObjectType; |
| |
| /** |
| * Interface that all catalog objects implement. |
| */ |
| public interface CatalogObject extends HasName { |
| |
| /** |
| * Catalog objects are often serialized to Thrift. When doing so, many of the objects |
| * have a minimal "descriptor" form used in query execution as well as a more complete |
| * "full" form with all information, used in catalog topic updates and DDL responses to |
| * coordinators. When sending incremental update for a hdfs table, its "descriptor" form |
| * is used with no partitions. Its incremental partition updates will follow it in the |
| * same topic update. "invalidation" form means only the name will be included. "none" |
| * form means return nothing, i.e. null. |
| */ |
| static enum ThriftObjectType { |
| FULL, |
| DESCRIPTOR_ONLY, |
| INVALIDATION, |
| NONE |
| } |
| |
| // Returns the TCatalogObject type of this Catalog object. |
| public TCatalogObjectType getCatalogObjectType(); |
| |
| // Returns the unqualified object name. |
| @Override |
| public String getName(); |
| |
| // Returns the unique name of this catalog object. |
| public String getUniqueName(); |
| |
| // Returns the version of this catalog object. |
| public long getCatalogVersion(); |
| |
| // Sets the version of this catalog object. |
| public void setCatalogVersion(long newVersion); |
| |
| // Returns true if this CatalogObject has had its metadata loaded, false otherwise. |
| public boolean isLoaded(); |
| } |