1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.shardingsphere.distsql.handler.engine.update.rdl.rule.spi.database;
19
20 import org.apache.shardingsphere.infra.config.rule.RuleConfiguration;
21 import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
22 import org.apache.shardingsphere.sql.parser.sql.common.statement.SQLStatement;
23
24 /**
25 * Database rule alter executor.
26 *
27 * @param <T> type of SQL statement
28 * @param <R> type of rule
29 * @param <C> type of rule configuration
30 */
31 public interface DatabaseRuleAlterExecutor<T extends SQLStatement, R extends ShardingSphereRule, C extends RuleConfiguration> extends DatabaseRuleDefinitionExecutor<T, R> {
32
33 /**
34 * Build to be altered rule configuration.
35 *
36 * @param sqlStatement SQL statement
37 * @return to be altered rule configuration
38 */
39 C buildToBeAlteredRuleConfiguration(T sqlStatement);
40
41 /**
42 * TODO Remove temporary default implementation
43 * Build to be dropped rule configuration.
44 *
45 * @param toBeAlteredRuleConfig new rule configuration to be renewed
46 * @return to be dropped rule configuration
47 */
48 C buildToBeDroppedRuleConfiguration(C toBeAlteredRuleConfig);
49 }