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MysqlDataSourceFactory.java

/*
 Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
 

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA



 */
package com.mysql.jdbc.jdbc2.optional;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.Name;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;

import com.mysql.jdbc.NonRegisteringDriver;

/**
 * Factory class for MysqlDataSource objects
 * 
 * @author Mark Matthews
 */
00043 public class MysqlDataSourceFactory implements ObjectFactory {
      /**
       * The class name for a standard MySQL DataSource.
       */
00047       protected final static String DATA_SOURCE_CLASS_NAME = "com.mysql.jdbc.jdbc2.optional.MysqlDataSource";

      /**
       * The class name for a poolable MySQL DataSource.
       */
00052       protected final static String POOL_DATA_SOURCE_CLASS_NAME = "com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource";

      /**
       * The class name for a MysqlXADataSource
       */
       
00058       protected final static String XA_DATA_SOURCE_CLASS_NAME = "com.mysql.jdbc.jdbc2.optional.MysqlXADataSource";
      
      /**
       * DOCUMENT ME!
       * 
       * @param refObj
       *            DOCUMENT ME!
       * @param nm
       *            DOCUMENT ME!
       * @param ctx
       *            DOCUMENT ME!
       * @param env
       *            DOCUMENT ME!
       * @return DOCUMENT ME!
       * @throws Exception
       *             DOCUMENT ME!
       */
00075       public Object getObjectInstance(Object refObj, Name nm, Context ctx,
                  Hashtable env) throws Exception {
            Reference ref = (Reference) refObj;
            String className = ref.getClassName();

            if ((className != null)
                        && (className.equals(DATA_SOURCE_CLASS_NAME) || className
                                    .equals(POOL_DATA_SOURCE_CLASS_NAME) ||
                                    className.equals(XA_DATA_SOURCE_CLASS_NAME))) {
                  MysqlDataSource dataSource = null;

                  try {
                        dataSource = (MysqlDataSource) Class.forName(className)
                                    .newInstance();
                  } catch (Exception ex) {
                        throw new RuntimeException("Unable to create DataSource of "
                                    + "class '" + className + "', reason: " + ex.toString());
                  }

                  int portNumber = 3306;

                  String portNumberAsString = nullSafeRefAddrStringGet("port", ref);
                  
                  if (portNumberAsString != null) {
                        portNumber = Integer.parseInt(portNumberAsString);
                  }

                  dataSource.setPort(portNumber);
                  
                  String user = nullSafeRefAddrStringGet(NonRegisteringDriver.USER_PROPERTY_KEY, ref);

                  if (user != null) {
                        dataSource.setUser(user);
                  }

                  String password = nullSafeRefAddrStringGet(NonRegisteringDriver.PASSWORD_PROPERTY_KEY, ref);

                  if (password != null) {
                        dataSource.setPassword(password);
                  }

                  String serverName = nullSafeRefAddrStringGet("serverName", ref);

                  if (serverName != null) {
                        dataSource.setServerName(serverName);
                  }

                  String databaseName = nullSafeRefAddrStringGet("databaseName", ref);

                  if (databaseName != null) {
                        dataSource.setDatabaseName(databaseName);
                  }

                  String explicitUrlAsString = nullSafeRefAddrStringGet("explicitUrl", ref);

                  if (explicitUrlAsString != null) {
                        if (Boolean.valueOf(explicitUrlAsString).booleanValue()) {
                              dataSource.setUrl(nullSafeRefAddrStringGet("url", ref));
                        }
                  }

                  dataSource.setPropertiesViaRef(ref);

                  return dataSource;
            }

            // We can't create an instance of the reference
            return null;
      }
      
      private String nullSafeRefAddrStringGet(String referenceName, Reference ref) {
            RefAddr refAddr = ref.get(referenceName);
            
            String asString = refAddr != null ? (String)refAddr.getContent() : null;
            
            return asString;
      }
}

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