82 lines
3.3 KiB
Java
82 lines
3.3 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.tomcat.dbcp.dbcp2;
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import java.sql.Driver;
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import java.sql.DriverManager;
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import java.sql.SQLException;
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/*
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* Creates {@link Driver} instances.
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*
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* @since 2.7.0
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*/
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class DriverFactory {
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static Driver createDriver(final BasicDataSource basicDataSource) throws SQLException {
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// Load the JDBC driver class
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Driver driverToUse = basicDataSource.getDriver();
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String driverClassName = basicDataSource.getDriverClassName();
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ClassLoader driverClassLoader = basicDataSource.getDriverClassLoader();
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String url = basicDataSource.getUrl();
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if (driverToUse == null) {
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Class<?> driverFromCCL = null;
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if (driverClassName != null) {
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try {
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try {
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if (driverClassLoader == null) {
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driverFromCCL = Class.forName(driverClassName);
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} else {
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driverFromCCL = Class.forName(driverClassName, true, driverClassLoader);
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}
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} catch (final ClassNotFoundException cnfe) {
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driverFromCCL = Thread.currentThread().getContextClassLoader().loadClass(driverClassName);
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}
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} catch (final Exception t) {
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final String message = "Cannot load JDBC driver class '" + driverClassName + "'";
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basicDataSource.log(message, t);
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throw new SQLException(message, t);
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}
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}
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try {
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if (driverFromCCL == null) {
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driverToUse = DriverManager.getDriver(url);
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} else {
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// Usage of DriverManager is not possible, as it does not
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// respect the ContextClassLoader
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// N.B. This cast may cause ClassCastException which is
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// handled below
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driverToUse = (Driver) driverFromCCL.getConstructor().newInstance();
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if (!driverToUse.acceptsURL(url)) {
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throw new SQLException("No suitable driver", "08001");
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}
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}
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} catch (final Exception t) {
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final String message = "Cannot create JDBC driver of class '"
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+ (driverClassName != null ? driverClassName : "") + "' for connect URL '" + url + "'";
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basicDataSource.log(message, t);
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throw new SQLException(message, t);
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}
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}
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return driverToUse;
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}
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}
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