001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    
021    package org.apache.geronimo.jdbc;
022    
023    import java.util.List;
024    import java.util.ArrayList;
025    import java.util.Properties;
026    import java.sql.Driver;
027    import java.sql.Connection;
028    import java.sql.SQLException;
029    import java.sql.DriverPropertyInfo;
030    import java.sql.DriverManager;
031    
032    /**
033     * Class to sneak around idiotic classloading restrictions in DriverManager.  This basically does the same as DriverManager
034     * except that you register Driver instances directly.
035     * @version $Rev: 533154 $ $Date: 2007-04-27 12:06:53 -0400 (Fri, 27 Apr 2007) $
036     */
037    public class DelegatingDriver implements Driver {
038    
039        private static final List<Driver> DRIVERS = new ArrayList<Driver>();
040    
041        static {
042            try {
043                DriverManager.registerDriver(new DelegatingDriver());
044            } catch (SQLException e) {
045                throw new RuntimeException(e);
046            }
047        }
048    
049        public static void registerDriver(Driver instance) {
050            DRIVERS.add(instance);
051        }
052    
053        public static void unregisterDriver(Driver instance) {
054            DRIVERS.remove(instance);
055        }
056    
057        public Connection connect(String url, Properties info) throws SQLException {
058            for (Driver driver: DRIVERS) {
059                Connection conn = driver.connect(url, info);
060                if (conn != null) {
061                    return conn;
062                }
063            }
064            return null;
065        }
066    
067        public boolean acceptsURL(String url) throws SQLException {
068            for (Driver driver: DRIVERS) {
069                if (driver.acceptsURL(url)) {
070                    return true;
071                }
072            }
073            return false;
074        }
075    
076        public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) throws SQLException {
077            return new DriverPropertyInfo[0];
078        }
079    
080        public int getMajorVersion() {
081            return 1;
082        }
083    
084        public int getMinorVersion() {
085            return 0;
086        }
087    
088        public boolean jdbcCompliant() {
089            //Lie through our teeth
090            return true;
091        }
092    }