org.apache.tomcat.dbcp.dbcp2.DriverFactory Maven / Gradle / Ivy
/*
* 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.tomcat.dbcp.dbcp2;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
/*
* Creates {@link Driver} instances.
*
* @since 2.7.0
*/
final class DriverFactory {
static Driver createDriver(final BasicDataSource basicDataSource) throws SQLException {
// Load the JDBC driver class
Driver driverToUse = basicDataSource.getDriver();
final String driverClassName = basicDataSource.getDriverClassName();
final ClassLoader driverClassLoader = basicDataSource.getDriverClassLoader();
final String url = basicDataSource.getUrl();
if (driverToUse == null) {
Class driverFromCCL = null;
if (driverClassName != null) {
try {
try {
if (driverClassLoader == null) {
driverFromCCL = Class.forName(driverClassName);
} else {
driverFromCCL = Class.forName(driverClassName, true, driverClassLoader);
}
} catch (final ClassNotFoundException cnfe) {
driverFromCCL = Thread.currentThread().getContextClassLoader().loadClass(driverClassName);
}
} catch (final Exception t) {
final String message = "Cannot load JDBC driver class '" + driverClassName + "'";
basicDataSource.log(message, t);
throw new SQLException(message, t);
}
}
try {
if (driverFromCCL == null) {
driverToUse = DriverManager.getDriver(url);
} else {
// Usage of DriverManager is not possible, as it does not
// respect the ContextClassLoader
// N.B. This cast may cause ClassCastException which is
// handled below
driverToUse = (Driver) driverFromCCL.getConstructor().newInstance();
if (!driverToUse.acceptsURL(url)) {
throw new SQLException("No suitable driver", "08001");
}
}
} catch (final Exception t) {
final String message = "Cannot create JDBC driver of class '"
+ (driverClassName != null ? driverClassName : "") + "' for connect URL '" + url + "'";
basicDataSource.log(message, t);
throw new SQLException(message, t);
}
}
return driverToUse;
}
}