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1   package org.apache.torque.adapter;
2   
3   /* ====================================================================
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56  
57  import java.util.HashMap;
58  import java.util.Map;
59  
60  /***
61   * This class creates different {@link org.apache.torque.adapter.DB}
62   * objects based on specified JDBC driver name.
63   *
64   * @author <a href="mailto:frank.kim@clearink.com">Frank Y. Kim</a>
65   * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
66   * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a>
67   * @author <a href="mailto:ralf@reswi.ruhr.de">Ralf Stranzenbach</a>
68   * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
69   * @version $Id: DBFactory.java,v 1.35 2003/01/08 16:43:57 henning Exp $
70   */
71  public class DBFactory
72  {
73      /***
74       * JDBC driver to Torque Adapter map.
75       */
76      private static Map adapters = new HashMap(40);
77  
78      /***
79       * Initialize the JDBC driver to Torque Adapter map.
80       */
81      static
82      {
83          adapters.put("com.ibm.as400.access.AS400JDBCDriver", DBDB2400.class);
84          adapters.put("COM.ibm.db2.jdbc.app.DB2Driver", DBDB2App.class);
85          adapters.put("COM.ibm.db2.jdbc.net.DB2Driver", DBDB2Net.class);
86          adapters.put("COM.cloudscape.core.JDBCDriver", DBCloudscape.class);
87          adapters.put("org.hsql.jdbcDriver", DBHypersonicSQL.class);
88          adapters.put("org.hsqldb.jdbcDriver", DBHypersonicSQL.class);
89          adapters.put("interbase.interclient.Driver", DBInterbase.class);
90          adapters.put("org.enhydra.instantdb.jdbc.idbDriver", DBInstantDB.class);
91          adapters.put("com.microsoft.jdbc.sqlserver.SQLServerDriver",
92              DBMSSQL.class);
93          adapters.put("com.jnetdirect.jsql.JSQLDriver", DBMSSQL.class);
94          adapters.put("org.gjt.mm.mysql.Driver", DBMM.class);
95          adapters.put("oracle.jdbc.driver.OracleDriver", DBOracle.class);
96          adapters.put("org.postgresql.Driver", DBPostgres.class);
97          adapters.put("com.sap.dbtech.jdbc.DriverSapDB", DBSapDB.class);
98          adapters.put("com.sybase.jdbc.SybDriver", DBSybase.class);
99          adapters.put("com.sybase.jdbc2.jdbc.SybDriver", DBSybase.class);
100         adapters.put("weblogic.jdbc.pool.Driver", DBWeblogic.class);
101         adapters.put("org.axiondb.jdbc.AxionDriver", DBAxion.class);
102         adapters.put("com.informix.jdbc.IfxDriver", DBInformix.class);
103         adapters.put("sun.jdbc.odbc.JdbcOdbcDriver", DBOdbc.class);
104 
105         // add some short names to be used when drivers are not used
106         adapters.put("as400", DBDB2400.class);
107         adapters.put("db2app", DBDB2App.class);
108         adapters.put("db2net", DBDB2Net.class);
109         adapters.put("cloudscape", DBCloudscape.class);
110         adapters.put("hypersonic", DBHypersonicSQL.class);
111         adapters.put("interbase", DBInterbase.class);
112         adapters.put("instantdb", DBInstantDB.class);
113         adapters.put("mssql", DBMSSQL.class);
114         adapters.put("mysql", DBMM.class);
115         adapters.put("oracle", DBOracle.class);
116         adapters.put("postgresql", DBPostgres.class);
117         adapters.put("sapdb", DBSapDB.class);
118         adapters.put("sybase", DBSybase.class);
119         adapters.put("weblogic", DBWeblogic.class);
120         adapters.put("axion", DBAxion.class);
121         adapters.put("informix", DBInformix.class);
122         adapters.put("odbc", DBOdbc.class);
123         adapters.put("msaccess", DBOdbc.class);
124 
125         adapters.put("", DBNone.class);
126     }
127 
128     /***
129      * Creates a new instance of the Torque database adapter associated
130      * with the specified JDBC driver or adapter key.
131      *
132      * @param driver The fully-qualified name of the JDBC driver to
133      * create a new adapter instance for or a shorter form adapter key.
134      * @return An instance of a Torque database adapter.
135      * @throws InstantiationException throws if the JDBC driver could not be
136      *      instantiated
137      */
138     public static DB create(String driver)
139         throws InstantiationException
140     {
141         Class adapterClass = (Class) adapters.get(driver);
142 
143         if (adapterClass != null)
144         {
145             try
146             {
147                 DB adapter = (DB) adapterClass.newInstance();
148                 // adapter.setJDBCDriver(driver);
149                 return adapter;
150             }
151             catch (IllegalAccessException e)
152             {
153                 throw new InstantiationException(
154                     "Could not instantiate adapter for JDBC driver: "
155                     + driver
156                     + ": Assure that adapter bytecodes are in your classpath");
157             }
158         }
159         else
160         {
161             throw new InstantiationException(
162                 "Unknown JDBC driver: "
163                 + driver
164                 + ": Check your configuration file");
165         }
166     }
167 }