1 package org.apache.torque.adapter;
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22 import java.util.HashMap;
23 import java.util.Map;
24
25 /***
26 * This class creates different {@link org.apache.torque.adapter.DB}
27 * objects based on specified JDBC driver name.
28 *
29 * @author <a href="mailto:frank.kim@clearink.com">Frank Y. Kim</a>
30 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
31 * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a>
32 * @author <a href="mailto:ralf@reswi.ruhr.de">Ralf Stranzenbach</a>
33 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
34 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
35 * @version $Id: DBFactory.java 476550 2006-11-18 16:08:37Z tfischer $
36 */
37 public class DBFactory
38 {
39 /***
40 * JDBC driver to Torque Adapter map.
41 */
42 private static Map adapters = new HashMap(40);
43
44 /***
45 * Initialize the JDBC driver to Torque Adapter map.
46 */
47 static
48 {
49 adapters.put("com.ibm.as400.access.AS400JDBCDriver", DBDB2400.class);
50 adapters.put("COM.ibm.db2.jdbc.app.DB2Driver", DBDB2App.class);
51 adapters.put("COM.ibm.db2.jdbc.net.DB2Driver", DBDB2Net.class);
52 adapters.put("COM.cloudscape.core.JDBCDriver", DBCloudscape.class);
53 adapters.put("org.firebirdsql.jdbc.FBDriver", DBFirebird.class);
54 adapters.put("org.hsql.jdbcDriver", DBHypersonicSQL.class);
55 adapters.put("org.hsqldb.jdbcDriver", DBHypersonicSQL.class);
56 adapters.put("interbase.interclient.Driver", DBInterbase.class);
57 adapters.put("org.enhydra.instantdb.jdbc.idbDriver", DBInstantDB.class);
58 adapters.put("com.microsoft.jdbc.sqlserver.SQLServerDriver",
59 DBMSSQL.class);
60 adapters.put("com.jnetdirect.jsql.JSQLDriver", DBMSSQL.class);
61 adapters.put("org.gjt.mm.mysql.Driver", DBMM.class);
62 adapters.put("oracle.jdbc.driver.OracleDriver", DBOracle.class);
63 adapters.put("org.postgresql.Driver", DBPostgres.class);
64 adapters.put("com.sap.dbtech.jdbc.DriverSapDB", DBSapDB.class);
65 adapters.put("com.sybase.jdbc.SybDriver", DBSybase.class);
66 adapters.put("com.sybase.jdbc2.jdbc.SybDriver", DBSybase.class);
67 adapters.put("weblogic.jdbc.pool.Driver", DBWeblogic.class);
68 adapters.put("org.axiondb.jdbc.AxionDriver", DBAxion.class);
69 adapters.put("com.informix.jdbc.IfxDriver", DBInformix.class);
70 adapters.put("sun.jdbc.odbc.JdbcOdbcDriver", DBOdbc.class);
71
72 adapters.put("com.ibm.db2.jcc.DB2Driver", DBDerby.class);
73 adapters.put("org.apache.derby.jdbc.EmbeddedDriver", DBDerby.class);
74
75
76
77 adapters.put("as400", DBDB2400.class);
78 adapters.put("db2app", DBDB2App.class);
79 adapters.put("db2net", DBDB2Net.class);
80 adapters.put("cloudscape", DBCloudscape.class);
81 adapters.put("firebird", DBFirebird.class);
82 adapters.put("hypersonic", DBHypersonicSQL.class);
83 adapters.put("interbase", DBInterbase.class);
84 adapters.put("instantdb", DBInstantDB.class);
85 adapters.put("mssql", DBMSSQL.class);
86 adapters.put("mysql", DBMM.class);
87 adapters.put("oracle", DBOracle.class);
88 adapters.put("postgresql", DBPostgres.class);
89 adapters.put("sapdb", DBSapDB.class);
90 adapters.put("sybase", DBSybase.class);
91 adapters.put("weblogic", DBWeblogic.class);
92 adapters.put("axion", DBAxion.class);
93 adapters.put("informix", DBInformix.class);
94 adapters.put("odbc", DBOdbc.class);
95 adapters.put("msaccess", DBOdbc.class);
96
97 adapters.put("derby", DBDerby.class);
98
99 adapters.put("", DBNone.class);
100 }
101
102 /***
103 * Private constructor to prevent instantiation.
104 *
105 * Class contains only static methods, so no instances are needed.
106 */
107 private DBFactory()
108 {
109 }
110
111 /***
112 * Creates a new instance of the Torque database adapter associated
113 * with the specified JDBC driver or adapter key.
114 *
115 * @param key The fully-qualified name of the JDBC driver
116 * or a shorter form adapter key.
117 * @return An instance of a Torque database adapter, or null if
118 * no adapter exists for the given key.
119 * @throws InstantiationException throws if the adapter could not be
120 * instantiated
121 */
122 public static DB create(String key)
123 throws InstantiationException
124 {
125 Class adapterClass = (Class) adapters.get(key);
126
127 if (adapterClass == null)
128 {
129 return null;
130 }
131
132 try
133 {
134 DB adapter = (DB) adapterClass.newInstance();
135
136 return adapter;
137 }
138 catch (IllegalAccessException e)
139 {
140 throw new InstantiationException(
141 "Could not instantiate adapter for key : "
142 + key
143 + ": Assure that adapter classes are in your classpath");
144 }
145 }
146
147 /***
148 * Creates a new instance of the Torque database adapter associated
149 * with the specified JDBC driver or adapter key and the class defined.
150 *
151 * @param key The fully-qualified name of the JDBC driver
152 * or a shorter form adapter key.
153 * @param className The fully qualified name of the adapter class
154 * @return An instance of a Torque database adapter.
155 * @throws InstantiationException throws if the adapter could not be
156 * instantiated
157 */
158 public static DB create(String key, String className)
159 throws InstantiationException
160 {
161 Class adapterClass;
162
163 try
164 {
165 adapterClass = (Class) Class.forName(className);
166 }
167 catch (ClassNotFoundException e)
168 {
169 throw new InstantiationException(
170 "Could not find adapter "
171 + className
172 + " for key "
173 + key
174 + ": Check your configuration file");
175 }
176
177 try
178 {
179 DB adapter = (DB) adapterClass.newInstance();
180 adapters.put(key, adapterClass);
181
182 return adapter;
183 }
184 catch (IllegalAccessException e)
185 {
186 throw new InstantiationException(
187 "Could not instantiate adapter for key: "
188 + key
189 + ": Assure that adapter classes are in your classpath");
190 }
191 }
192 }