oracle.toplink.essentials.sessions.DirectConnector Maven / Gradle / Ivy
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.sessions;
import java.util.*;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.sql.*;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.internal.security.PrivilegedAccessHelper;
import oracle.toplink.essentials.internal.security.PrivilegedNewInstanceFromClass;
/**
*
* Purpose:Use this Connector to build a java.sql.Connection by
* directly instantiating the Driver, as opposed to using the DriverManager.
*
* @author Big Country
* @since TOPLink/Java 2.1
*/
public class DirectConnector extends DefaultConnector {
/** cache up the instantiated Driver to speed up reconnects */
protected Driver cachedInstance;
/**
* PUBLIC:
* Construct a Connector with default settings (Sun JDBC-ODBC bridge).
* Although this does not really make sense for a "direct" Connector -
* the Sun JdbcOdbcDriver works fine with the DriverManager.
*/
public DirectConnector() {
super();
}
/**
* PUBLIC:
* Construct a Connector with the specified settings.
*/
public DirectConnector(String driverClassName, String driverURLHeader, String databaseURL) {
super(driverClassName, driverURLHeader, databaseURL);
}
/**
* INTERNAL:
* Connect with the specified properties and return the Connection.
* @return java.sql.Connection
*/
public Connection connect(Properties properties) throws DatabaseException {
try {
return this.instantiateDriver(this.loadDriver()).connect(this.getConnectionString(), properties);
} catch (SQLException exception) {
throw DatabaseException.sqlException(exception);
}
}
/**
* INTERNAL:
* Instantiate the Driver if necessary.
* @return java.sql.Driver
*/
protected Driver instantiateDriver(Class driverClass) throws DatabaseException {
if (cachedInstance != null) {
return cachedInstance;
}
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
cachedInstance = (Driver)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(driverClass));
} catch (PrivilegedActionException exception) {
Exception throwableException = exception.getException();
if (throwableException instanceof InstantiationException) {
throw DatabaseException.configurationErrorNewInstanceInstantiationException((InstantiationException)throwableException, driverClass);
} else {
throw DatabaseException.configurationErrorNewInstanceIllegalAccessException((IllegalAccessException)throwableException, driverClass);
}
}
} else {
cachedInstance = (Driver)PrivilegedAccessHelper.newInstanceFromClass(driverClass);
}
return cachedInstance;
} catch (InstantiationException ie) {
throw DatabaseException.configurationErrorNewInstanceInstantiationException(ie, driverClass);
} catch (IllegalAccessException iae) {
throw DatabaseException.configurationErrorNewInstanceIllegalAccessException(iae, driverClass);
}
}
}