| /* |
| * 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.empire.db; |
| |
| import org.apache.empire.exceptions.InvalidArgumentException; |
| |
| /** |
| * Base class for all objects that directly or indirectly belong to a database including the database object itself. |
| * Examples are: tables, views, columns, indexes, relations etc. |
| * Not included are: DBMSHanlders, helper classes |
| */ |
| public abstract class DBObject // *Deprecated* implements Serializable |
| { |
| // *Deprecated* private static final long serialVersionUID = 1L; |
| |
| /** |
| * Internally used for parameter checking |
| * @param name |
| * @param param |
| * @return |
| */ |
| public static <T extends Object> T checkParamNull(String name, T param) |
| { |
| if (param==null) |
| throw new InvalidArgumentException(name, param); |
| return param; |
| } |
| |
| /** |
| * Returns the database object to which this object belongs to. |
| * For the database object itself this function will return the this pointer. |
| * |
| * @return the database object |
| */ |
| public abstract <T extends DBDatabase> T getDatabase(); |
| } |