| /* |
| |
| Derby - Class org.apache.derbyTesting.functionTests.tests.upgradeTests.DriverUnloader |
| |
| 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.derbyTesting.functionTests.tests.upgradeTests; |
| |
| import java.sql.Driver; |
| import java.sql.DriverManager; |
| import java.sql.SQLException; |
| import java.util.Enumeration; |
| |
| /** |
| * Helper class used by the upgrade tests to unload JDBC drivers loaded in |
| * separate class loaders. This class must live in the same class loader as |
| * the drivers it attempts to unload. |
| */ |
| public class DriverUnloader { |
| /** |
| * Deregister all Derby drivers accessible from the class loader in which |
| * this class lives. |
| * |
| * @return {@code true} if a driver was unloaded, {@code false} otherwise |
| */ |
| public static boolean unload() throws SQLException { |
| boolean ret = false; |
| Enumeration e = DriverManager.getDrivers(); |
| while (e.hasMoreElements()) { |
| Driver driver = (Driver) e.nextElement(); |
| if (driver.getClass().getName().startsWith("org.apache.derby.")) { |
| DriverManager.deregisterDriver(driver); |
| ret = true; |
| } |
| } |
| return ret; |
| } |
| } |