/
AlterStatementExecutorFactory.java
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/
AlterStatementExecutorFactory.java
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/*
* 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.shardingsphere.proxy.backend.text.distsql.ral.common.alter;
import org.apache.shardingsphere.distsql.parser.statement.ral.common.AlterDistSQLStatement;
import org.apache.shardingsphere.distsql.parser.statement.ral.common.alter.AlterSQLParserRuleStatement;
import org.apache.shardingsphere.distsql.parser.statement.ral.common.alter.AlterTransactionRuleStatement;
import org.apache.shardingsphere.distsql.parser.statement.rdl.create.AlterTrafficRuleStatement;
import org.apache.shardingsphere.proxy.backend.session.ConnectionSession;
import org.apache.shardingsphere.proxy.backend.text.distsql.ral.common.alter.excutor.AlterSQLParserRuleExecutor;
import org.apache.shardingsphere.proxy.backend.text.distsql.ral.common.alter.excutor.AlterTrafficRuleExecutor;
import org.apache.shardingsphere.proxy.backend.text.distsql.ral.common.alter.excutor.AlterTransactionRuleExecutor;
import java.sql.SQLException;
/**
* Alter statement executor factory.
*/
public final class AlterStatementExecutorFactory {
/**
* Alter statement executor instance.
*
* @param sqlStatement alter dist SQL statement
* @param connectionSession connection session
* @return alter command executor
* @throws SQLException SQL exception
*/
public static AlterStatementExecutor newInstance(final AlterDistSQLStatement sqlStatement, final ConnectionSession connectionSession) throws SQLException {
if (sqlStatement instanceof AlterTransactionRuleStatement) {
return new AlterTransactionRuleExecutor((AlterTransactionRuleStatement) sqlStatement);
}
if (sqlStatement instanceof AlterSQLParserRuleStatement) {
return new AlterSQLParserRuleExecutor((AlterSQLParserRuleStatement) sqlStatement);
}
if (sqlStatement instanceof AlterTrafficRuleStatement) {
return new AlterTrafficRuleExecutor((AlterTrafficRuleStatement) sqlStatement);
}
throw new UnsupportedOperationException(sqlStatement.getClass().getCanonicalName());
}
}