author | smarks |
Mon, 20 Dec 2010 13:47:04 -0800 | |
changeset 7803 | 56bc97d69d93 |
parent 5506 | 202f599c92aa |
child 8797 | e8507464a69d |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved. |
2 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
2 | 8 |
* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.sql; |
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import java.util.Iterator; |
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import java.sql.Driver; |
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import java.util.ServiceLoader; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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/** |
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* <P>The basic service for managing a set of JDBC drivers.<br> |
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* <B>NOTE:</B> The {@link <code>DataSource</code>} interface, new in the |
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* JDBC 2.0 API, provides another way to connect to a data source. |
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* The use of a <code>DataSource</code> object is the preferred means of |
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* connecting to a data source. |
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* |
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* <P>As part of its initialization, the <code>DriverManager</code> class will |
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* attempt to load the driver classes referenced in the "jdbc.drivers" |
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* system property. This allows a user to customize the JDBC Drivers |
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* used by their applications. For example in your |
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* ~/.hotjava/properties file you might specify: |
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* <pre> |
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* <CODE>jdbc.drivers=foo.bah.Driver:wombat.sql.Driver:bad.taste.ourDriver</CODE> |
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* </pre> |
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*<P> The <code>DriverManager</code> methods <code>getConnection</code> and |
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* <code>getDrivers</code> have been enhanced to support the Java Standard Edition |
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* <a href="../../../technotes/guides/jar/jar.html#Service%20Provider">Service Provider</a> mechanism. JDBC 4.0 Drivers must |
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* include the file <code>META-INF/services/java.sql.Driver</code>. This file contains the name of the JDBC drivers |
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* implementation of <code>java.sql.Driver</code>. For example, to load the <code>my.sql.Driver</code> class, |
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* the <code>META-INF/services/java.sql.Driver</code> file would contain the entry: |
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* <pre> |
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* <code>my.sql.Driver</code> |
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* </pre> |
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* |
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* <P>Applications no longer need to explictly load JDBC drivers using <code>Class.forName()</code>. Existing programs |
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* which currently load JDBC drivers using <code>Class.forName()</code> will continue to work without |
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* modification. |
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* |
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* <P>When the method <code>getConnection</code> is called, |
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* the <code>DriverManager</code> will attempt to |
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* locate a suitable driver from amongst those loaded at |
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* initialization and those loaded explicitly using the same classloader |
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* as the current applet or application. |
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* |
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* <P> |
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* Starting with the Java 2 SDK, Standard Edition, version 1.3, a |
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* logging stream can be set only if the proper |
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* permission has been granted. Normally this will be done with |
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* the tool PolicyTool, which can be used to grant <code>permission |
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* java.sql.SQLPermission "setLog"</code>. |
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* @see Driver |
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* @see Connection |
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*/ |
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public class DriverManager { |
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/** |
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* The <code>SQLPermission</code> constant that allows the |
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* setting of the logging stream. |
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* @since 1.3 |
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*/ |
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final static SQLPermission SET_LOG_PERMISSION = |
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new SQLPermission("setLog"); |
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//--------------------------JDBC 2.0----------------------------- |
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/** |
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* Retrieves the log writer. |
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* |
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* The <code>getLogWriter</code> and <code>setLogWriter</code> |
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* methods should be used instead |
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* of the <code>get/setlogStream</code> methods, which are deprecated. |
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* @return a <code>java.io.PrintWriter</code> object |
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* @see #setLogWriter |
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* @since 1.2 |
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*/ |
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public static java.io.PrintWriter getLogWriter() { |
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return logWriter; |
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} |
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/** |
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* Sets the logging/tracing <code>PrintWriter</code> object |
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* that is used by the <code>DriverManager</code> and all drivers. |
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* <P> |
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* There is a minor versioning problem created by the introduction |
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* of the method <code>setLogWriter</code>. The |
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* method <code>setLogWriter</code> cannot create a <code>PrintStream</code> object |
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* that will be returned by <code>getLogStream</code>---the Java platform does |
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* not provide a backward conversion. As a result, a new application |
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* that uses <code>setLogWriter</code> and also uses a JDBC 1.0 driver that uses |
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* <code>getLogStream</code> will likely not see debugging information written |
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* by that driver. |
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*<P> |
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* Starting with the Java 2 SDK, Standard Edition, version 1.3 release, this method checks |
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* to see that there is an <code>SQLPermission</code> object before setting |
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* the logging stream. If a <code>SecurityManager</code> exists and its |
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* <code>checkPermission</code> method denies setting the log writer, this |
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* method throws a <code>java.lang.SecurityException</code>. |
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* |
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* @param out the new logging/tracing <code>PrintStream</code> object; |
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* <code>null</code> to disable logging and tracing |
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* @throws SecurityException |
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* if a security manager exists and its |
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* <code>checkPermission</code> method denies |
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* setting the log writer |
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* |
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* @see SecurityManager#checkPermission |
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* @see #getLogWriter |
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* @since 1.2 |
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*/ |
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public static void setLogWriter(java.io.PrintWriter out) { |
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SecurityManager sec = System.getSecurityManager(); |
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if (sec != null) { |
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sec.checkPermission(SET_LOG_PERMISSION); |
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} |
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logStream = null; |
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logWriter = out; |
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} |
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//--------------------------------------------------------------- |
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/** |
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* Attempts to establish a connection to the given database URL. |
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* The <code>DriverManager</code> attempts to select an appropriate driver from |
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* the set of registered JDBC drivers. |
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* |
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* @param url a database url of the form |
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* <code> jdbc:<em>subprotocol</em>:<em>subname</em></code> |
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* @param info a list of arbitrary string tag/value pairs as |
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* connection arguments; normally at least a "user" and |
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* "password" property should be included |
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* @return a Connection to the URL |
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* @exception SQLException if a database access error occurs |
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*/ |
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public static Connection getConnection(String url, |
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java.util.Properties info) throws SQLException { |
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// Gets the classloader of the code that called this method, may |
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// be null. |
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ClassLoader callerCL = DriverManager.getCallerClassLoader(); |
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return (getConnection(url, info, callerCL)); |
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} |
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/** |
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* Attempts to establish a connection to the given database URL. |
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* The <code>DriverManager</code> attempts to select an appropriate driver from |
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* the set of registered JDBC drivers. |
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* |
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* @param url a database url of the form |
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* <code>jdbc:<em>subprotocol</em>:<em>subname</em></code> |
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* @param user the database user on whose behalf the connection is being |
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* made |
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* @param password the user's password |
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* @return a connection to the URL |
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* @exception SQLException if a database access error occurs |
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*/ |
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public static Connection getConnection(String url, |
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String user, String password) throws SQLException { |
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java.util.Properties info = new java.util.Properties(); |
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// Gets the classloader of the code that called this method, may |
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// be null. |
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ClassLoader callerCL = DriverManager.getCallerClassLoader(); |
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if (user != null) { |
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info.put("user", user); |
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} |
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if (password != null) { |
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info.put("password", password); |
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} |
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return (getConnection(url, info, callerCL)); |
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} |
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/** |
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* Attempts to establish a connection to the given database URL. |
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* The <code>DriverManager</code> attempts to select an appropriate driver from |
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* the set of registered JDBC drivers. |
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* |
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* @param url a database url of the form |
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* <code> jdbc:<em>subprotocol</em>:<em>subname</em></code> |
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* @return a connection to the URL |
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* @exception SQLException if a database access error occurs |
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*/ |
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public static Connection getConnection(String url) |
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throws SQLException { |
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java.util.Properties info = new java.util.Properties(); |
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// Gets the classloader of the code that called this method, may |
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// be null. |
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ClassLoader callerCL = DriverManager.getCallerClassLoader(); |
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return (getConnection(url, info, callerCL)); |
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} |
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/** |
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* Attempts to locate a driver that understands the given URL. |
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* The <code>DriverManager</code> attempts to select an appropriate driver from |
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* the set of registered JDBC drivers. |
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* |
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* @param url a database URL of the form |
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* <code>jdbc:<em>subprotocol</em>:<em>subname</em></code> |
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* @return a <code>Driver</code> object representing a driver |
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* that can connect to the given URL |
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* @exception SQLException if a database access error occurs |
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*/ |
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public static Driver getDriver(String url) |
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throws SQLException { |
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java.util.Vector drivers = null; |
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println("DriverManager.getDriver(\"" + url + "\")"); |
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if (!initialized) { |
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initialize(); |
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} |
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synchronized (DriverManager.class){ |
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// use the read copy of the drivers vector |
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drivers = readDrivers; |
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} |
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// Gets the classloader of the code that called this method, may |
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// be null. |
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ClassLoader callerCL = DriverManager.getCallerClassLoader(); |
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// Walk through the loaded drivers attempting to locate someone |
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// who understands the given URL. |
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for (int i = 0; i < drivers.size(); i++) { |
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DriverInfo di = (DriverInfo)drivers.elementAt(i); |
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// If the caller does not have permission to load the driver then |
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// skip it. |
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if ( getCallerClass(callerCL, di.driverClassName ) != |
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di.driverClass ) { |
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println(" skipping: " + di); |
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continue; |
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} |
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try { |
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println(" trying " + di); |
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if (di.driver.acceptsURL(url)) { |
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// Success! |
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println("getDriver returning " + di); |
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return (di.driver); |
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} |
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} catch (SQLException ex) { |
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// Drop through and try the next driver. |
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} |
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} |
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println("getDriver: no suitable driver"); |
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throw new SQLException("No suitable driver", "08001"); |
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} |
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/** |
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* Registers the given driver with the <code>DriverManager</code>. |
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* A newly-loaded driver class should call |
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* the method <code>registerDriver</code> to make itself |
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* known to the <code>DriverManager</code>. |
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* |
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* @param driver the new JDBC Driver that is to be registered with the |
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* <code>DriverManager</code> |
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* @exception SQLException if a database access error occurs |
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*/ |
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public static synchronized void registerDriver(java.sql.Driver driver) |
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throws SQLException { |
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if (!initialized) { |
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initialize(); |
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} |
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298 |
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299 |
DriverInfo di = new DriverInfo(); |
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300 |
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301 |
di.driver = driver; |
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di.driverClass = driver.getClass(); |
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di.driverClassName = di.driverClass.getName(); |
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305 |
// Not Required -- drivers.addElement(di); |
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writeDrivers.addElement(di); |
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println("registerDriver: " + di); |
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/* update the read copy of drivers vector */ |
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readDrivers = (java.util.Vector) writeDrivers.clone(); |
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312 |
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313 |
} |
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314 |
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315 |
/** |
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316 |
* Drops a driver from the <code>DriverManager</code>'s list. |
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317 |
* Applets can only deregister drivers from their own classloaders. |
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318 |
* |
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319 |
* @param driver the JDBC Driver to drop |
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* @exception SQLException if a database access error occurs |
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321 |
*/ |
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322 |
public static synchronized void deregisterDriver(Driver driver) |
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323 |
throws SQLException { |
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324 |
// Gets the classloader of the code that called this method, |
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325 |
// may be null. |
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326 |
ClassLoader callerCL = DriverManager.getCallerClassLoader(); |
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println("DriverManager.deregisterDriver: " + driver); |
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328 |
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329 |
// Walk through the loaded drivers. |
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int i; |
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331 |
DriverInfo di = null; |
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332 |
for (i = 0; i < writeDrivers.size(); i++) { |
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di = (DriverInfo)writeDrivers.elementAt(i); |
|
334 |
if (di.driver == driver) { |
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335 |
break; |
|
336 |
} |
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337 |
} |
|
338 |
// If we can't find the driver just return. |
|
339 |
if (i >= writeDrivers.size()) { |
|
340 |
println(" couldn't find driver to unload"); |
|
341 |
return; |
|
342 |
} |
|
343 |
||
344 |
// If the caller does not have permission to load the driver then |
|
345 |
// throw a security exception. |
|
346 |
if (getCallerClass(callerCL, di.driverClassName ) != di.driverClass ) { |
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347 |
throw new SecurityException(); |
|
348 |
} |
|
349 |
||
350 |
// Remove the driver. Other entries in drivers get shuffled down. |
|
351 |
writeDrivers.removeElementAt(i); |
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352 |
||
353 |
/* update the read copy of drivers vector */ |
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354 |
readDrivers = (java.util.Vector) writeDrivers.clone(); |
|
355 |
} |
|
356 |
||
357 |
/** |
|
358 |
* Retrieves an Enumeration with all of the currently loaded JDBC drivers |
|
359 |
* to which the current caller has access. |
|
360 |
* |
|
361 |
* <P><B>Note:</B> The classname of a driver can be found using |
|
362 |
* <CODE>d.getClass().getName()</CODE> |
|
363 |
* |
|
364 |
* @return the list of JDBC Drivers loaded by the caller's class loader |
|
365 |
*/ |
|
366 |
public static java.util.Enumeration<Driver> getDrivers() { |
|
7803
56bc97d69d93
6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents:
5506
diff
changeset
|
367 |
java.util.Vector<Driver> result = new java.util.Vector<>(); |
2 | 368 |
java.util.Vector drivers = null; |
369 |
||
370 |
if (!initialized) { |
|
371 |
initialize(); |
|
372 |
} |
|
373 |
||
374 |
synchronized (DriverManager.class){ |
|
375 |
// use the readcopy of drivers |
|
376 |
drivers = readDrivers; |
|
377 |
} |
|
378 |
||
379 |
// Gets the classloader of the code that called this method, may |
|
380 |
// be null. |
|
381 |
ClassLoader callerCL = DriverManager.getCallerClassLoader(); |
|
382 |
||
383 |
// Walk through the loaded drivers. |
|
384 |
for (int i = 0; i < drivers.size(); i++) { |
|
385 |
DriverInfo di = (DriverInfo)drivers.elementAt(i); |
|
386 |
// If the caller does not have permission to load the driver then |
|
387 |
// skip it. |
|
388 |
if ( getCallerClass(callerCL, di.driverClassName ) != di.driverClass ) { |
|
389 |
println(" skipping: " + di); |
|
390 |
continue; |
|
391 |
} |
|
392 |
result.addElement(di.driver); |
|
393 |
} |
|
394 |
||
395 |
return (result.elements()); |
|
396 |
} |
|
397 |
||
398 |
||
399 |
/** |
|
400 |
* Sets the maximum time in seconds that a driver will wait |
|
401 |
* while attempting to connect to a database. |
|
402 |
* |
|
403 |
* @param seconds the login time limit in seconds; zero means there is no limit |
|
404 |
* @see #getLoginTimeout |
|
405 |
*/ |
|
406 |
public static void setLoginTimeout(int seconds) { |
|
407 |
loginTimeout = seconds; |
|
408 |
} |
|
409 |
||
410 |
/** |
|
411 |
* Gets the maximum time in seconds that a driver can wait |
|
412 |
* when attempting to log in to a database. |
|
413 |
* |
|
414 |
* @return the driver login time limit in seconds |
|
415 |
* @see #setLoginTimeout |
|
416 |
*/ |
|
417 |
public static int getLoginTimeout() { |
|
418 |
return (loginTimeout); |
|
419 |
} |
|
420 |
||
421 |
/** |
|
422 |
* Sets the logging/tracing PrintStream that is used |
|
423 |
* by the <code>DriverManager</code> |
|
424 |
* and all drivers. |
|
425 |
*<P> |
|
426 |
* In the Java 2 SDK, Standard Edition, version 1.3 release, this method checks |
|
427 |
* to see that there is an <code>SQLPermission</code> object before setting |
|
428 |
* the logging stream. If a <code>SecurityManager</code> exists and its |
|
429 |
* <code>checkPermission</code> method denies setting the log writer, this |
|
430 |
* method throws a <code>java.lang.SecurityException</code>. |
|
431 |
* |
|
432 |
* @param out the new logging/tracing PrintStream; to disable, set to <code>null</code> |
|
433 |
* @deprecated |
|
434 |
* @throws SecurityException if a security manager exists and its |
|
435 |
* <code>checkPermission</code> method denies setting the log stream |
|
436 |
* |
|
437 |
* @see SecurityManager#checkPermission |
|
438 |
* @see #getLogStream |
|
439 |
*/ |
|
440 |
public static void setLogStream(java.io.PrintStream out) { |
|
441 |
||
442 |
SecurityManager sec = System.getSecurityManager(); |
|
443 |
if (sec != null) { |
|
444 |
sec.checkPermission(SET_LOG_PERMISSION); |
|
445 |
} |
|
446 |
||
447 |
logStream = out; |
|
448 |
if ( out != null ) |
|
449 |
logWriter = new java.io.PrintWriter(out); |
|
450 |
else |
|
451 |
logWriter = null; |
|
452 |
} |
|
453 |
||
454 |
/** |
|
455 |
* Retrieves the logging/tracing PrintStream that is used by the <code>DriverManager</code> |
|
456 |
* and all drivers. |
|
457 |
* |
|
458 |
* @return the logging/tracing PrintStream; if disabled, is <code>null</code> |
|
459 |
* @deprecated |
|
460 |
* @see #setLogStream |
|
461 |
*/ |
|
462 |
public static java.io.PrintStream getLogStream() { |
|
463 |
return logStream; |
|
464 |
} |
|
465 |
||
466 |
/** |
|
467 |
* Prints a message to the current JDBC log stream. |
|
468 |
* |
|
469 |
* @param message a log or tracing message |
|
470 |
*/ |
|
471 |
public static void println(String message) { |
|
472 |
synchronized (logSync) { |
|
473 |
if (logWriter != null) { |
|
474 |
logWriter.println(message); |
|
475 |
||
476 |
// automatic flushing is never enabled, so we must do it ourselves |
|
477 |
logWriter.flush(); |
|
478 |
} |
|
479 |
} |
|
480 |
} |
|
481 |
||
482 |
//------------------------------------------------------------------------ |
|
483 |
||
484 |
// Returns the class object that would be created if the code calling the |
|
485 |
// driver manager had loaded the driver class, or null if the class |
|
486 |
// is inaccessible. |
|
487 |
private static Class getCallerClass(ClassLoader callerClassLoader, |
|
488 |
String driverClassName) { |
|
489 |
Class callerC = null; |
|
490 |
||
491 |
try { |
|
492 |
callerC = Class.forName(driverClassName, true, callerClassLoader); |
|
493 |
} |
|
494 |
catch (Exception ex) { |
|
495 |
callerC = null; // being very careful |
|
496 |
} |
|
497 |
||
498 |
return callerC; |
|
499 |
} |
|
500 |
||
501 |
private static void loadInitialDrivers() { |
|
502 |
String drivers; |
|
503 |
try { |
|
504 |
drivers = (String) AccessController.doPrivileged(new PrivilegedAction() { |
|
505 |
public Object run() { |
|
506 |
return System.getProperty("jdbc.drivers"); |
|
507 |
} |
|
508 |
}); |
|
509 |
} catch (Exception ex) { |
|
510 |
drivers = null; |
|
511 |
} |
|
512 |
// If the driver is packaged as a Service Provider, load it. |
|
513 |
// Get all the drivers through the classloader |
|
514 |
// exposed as a java.sql.Driver.class service. |
|
515 |
// ServiceLoader.load() replaces the sun.misc.Providers() |
|
516 |
||
517 |
AccessController.doPrivileged(new PrivilegedAction() { |
|
518 |
public Object run() { |
|
519 |
||
520 |
ServiceLoader<Driver> loadedDrivers = ServiceLoader.load(Driver.class); |
|
521 |
Iterator driversIterator = loadedDrivers.iterator(); |
|
522 |
||
523 |
/* Load these drivers, so that they can be instantiated. |
|
524 |
* It may be the case that the driver class may not be there |
|
525 |
* i.e. there may be a packaged driver with the service class |
|
526 |
* as implementation of java.sql.Driver but the actual class |
|
527 |
* may be missing. In that case a java.util.ServiceConfigurationError |
|
528 |
* will be thrown at runtime by the VM trying to locate |
|
529 |
* and load the service. |
|
530 |
* |
|
531 |
* Adding a try catch block to catch those runtime errors |
|
532 |
* if driver not available in classpath but it's |
|
533 |
* packaged as service and that service is there in classpath. |
|
534 |
*/ |
|
535 |
try{ |
|
536 |
while(driversIterator.hasNext()) { |
|
537 |
println(" Loading done by the java.util.ServiceLoader : "+driversIterator.next()); |
|
538 |
} |
|
539 |
} catch(Throwable t) { |
|
540 |
// Do nothing |
|
541 |
} |
|
542 |
return null; |
|
543 |
} |
|
544 |
}); |
|
545 |
||
546 |
println("DriverManager.initialize: jdbc.drivers = " + drivers); |
|
547 |
if (drivers == null) { |
|
548 |
return; |
|
549 |
} |
|
550 |
while (drivers.length() != 0) { |
|
551 |
int x = drivers.indexOf(':'); |
|
552 |
String driver; |
|
553 |
if (x < 0) { |
|
554 |
driver = drivers; |
|
555 |
drivers = ""; |
|
556 |
} else { |
|
557 |
driver = drivers.substring(0, x); |
|
558 |
drivers = drivers.substring(x+1); |
|
559 |
} |
|
560 |
if (driver.length() == 0) { |
|
561 |
continue; |
|
562 |
} |
|
563 |
try { |
|
564 |
println("DriverManager.Initialize: loading " + driver); |
|
565 |
Class.forName(driver, true, |
|
566 |
ClassLoader.getSystemClassLoader()); |
|
567 |
} catch (Exception ex) { |
|
568 |
println("DriverManager.Initialize: load failed: " + ex); |
|
569 |
} |
|
570 |
} |
|
571 |
} |
|
572 |
||
573 |
||
574 |
// Worker method called by the public getConnection() methods. |
|
575 |
private static Connection getConnection( |
|
576 |
String url, java.util.Properties info, ClassLoader callerCL) throws SQLException { |
|
577 |
java.util.Vector drivers = null; |
|
578 |
/* |
|
579 |
* When callerCl is null, we should check the application's |
|
580 |
* (which is invoking this class indirectly) |
|
581 |
* classloader, so that the JDBC driver class outside rt.jar |
|
582 |
* can be loaded from here. |
|
583 |
*/ |
|
584 |
synchronized(DriverManager.class) { |
|
585 |
// synchronize loading of the correct classloader. |
|
586 |
if(callerCL == null) { |
|
587 |
callerCL = Thread.currentThread().getContextClassLoader(); |
|
588 |
} |
|
589 |
} |
|
590 |
||
591 |
if(url == null) { |
|
592 |
throw new SQLException("The url cannot be null", "08001"); |
|
593 |
} |
|
594 |
||
595 |
println("DriverManager.getConnection(\"" + url + "\")"); |
|
596 |
||
597 |
if (!initialized) { |
|
598 |
initialize(); |
|
599 |
} |
|
600 |
||
601 |
synchronized (DriverManager.class){ |
|
602 |
// use the readcopy of drivers |
|
603 |
drivers = readDrivers; |
|
604 |
} |
|
605 |
||
606 |
// Walk through the loaded drivers attempting to make a connection. |
|
607 |
// Remember the first exception that gets raised so we can reraise it. |
|
608 |
SQLException reason = null; |
|
609 |
for (int i = 0; i < drivers.size(); i++) { |
|
610 |
DriverInfo di = (DriverInfo)drivers.elementAt(i); |
|
611 |
||
612 |
// If the caller does not have permission to load the driver then |
|
613 |
// skip it. |
|
614 |
if ( getCallerClass(callerCL, di.driverClassName ) != di.driverClass ) { |
|
615 |
println(" skipping: " + di); |
|
616 |
continue; |
|
617 |
} |
|
618 |
try { |
|
619 |
println(" trying " + di); |
|
620 |
Connection result = di.driver.connect(url, info); |
|
621 |
if (result != null) { |
|
622 |
// Success! |
|
623 |
println("getConnection returning " + di); |
|
624 |
return (result); |
|
625 |
} |
|
626 |
} catch (SQLException ex) { |
|
627 |
if (reason == null) { |
|
628 |
reason = ex; |
|
629 |
} |
|
630 |
} |
|
631 |
} |
|
632 |
||
633 |
// if we got here nobody could connect. |
|
634 |
if (reason != null) { |
|
635 |
println("getConnection failed: " + reason); |
|
636 |
throw reason; |
|
637 |
} |
|
638 |
||
639 |
println("getConnection: no suitable driver found for "+ url); |
|
640 |
throw new SQLException("No suitable driver found for "+ url, "08001"); |
|
641 |
} |
|
642 |
||
643 |
||
644 |
// Class initialization. |
|
645 |
static void initialize() { |
|
646 |
if (initialized) { |
|
647 |
return; |
|
648 |
} |
|
649 |
initialized = true; |
|
650 |
loadInitialDrivers(); |
|
651 |
println("JDBC DriverManager initialized"); |
|
652 |
} |
|
653 |
||
654 |
/* Prevent the DriverManager class from being instantiated. */ |
|
655 |
private DriverManager(){} |
|
656 |
||
657 |
/* write copy of the drivers vector */ |
|
658 |
private static java.util.Vector writeDrivers = new java.util.Vector(); |
|
659 |
||
660 |
/* write copy of the drivers vector */ |
|
661 |
private static java.util.Vector readDrivers = new java.util.Vector(); |
|
662 |
||
663 |
private static int loginTimeout = 0; |
|
664 |
private static java.io.PrintWriter logWriter = null; |
|
665 |
private static java.io.PrintStream logStream = null; |
|
666 |
private static boolean initialized = false; |
|
667 |
||
668 |
private static Object logSync = new Object(); |
|
669 |
||
670 |
/* Returns the caller's class loader, or null if none */ |
|
671 |
private static native ClassLoader getCallerClassLoader(); |
|
672 |
||
673 |
} |
|
674 |
||
675 |
// DriverInfo is a package-private support class. |
|
676 |
class DriverInfo { |
|
677 |
Driver driver; |
|
678 |
Class driverClass; |
|
679 |
String driverClassName; |
|
680 |
||
681 |
public String toString() { |
|
682 |
return ("driver[className=" + driverClassName + "," + driver + "]"); |
|
683 |
} |
|
684 |
} |