|
1
33
34 package com.internetcds.jdbc.tds;
35
36
37
38 public class Constructors
39 {
40 public static final String  cvsVersion = "$Id: Constructors.java,v 1.1 2006/06/23 10:39:04 sinisa Exp $";
41
42 static boolean dejavu = false;
43
44 static final int JDBC2_0 = 2;
45 static final int JDBC1_0 = 1;
46
47 private static int jdbcVersion = JDBC1_0;
48 private static String jdbcVersionName = null;
49
50 private static java.lang.reflect.Constructor resultSetCtor = null;
51 private static java.lang.reflect.Constructor preparedStatementCtor = null;
52 private static java.lang.reflect.Constructor callableStatementCtor = null;
53 private static java.lang.reflect.Constructor connectionCtor = null;
54
55
56 static private java.lang.reflect.Constructor getCtor(
57 String classNamePrefix,
58 Class paramTypes[])
59 throws java.lang.ClassNotFoundException , java.lang.NoSuchMethodException
60 {
61 java.lang.reflect.Constructor result = null;
62 String className = null;
63 Class theClass = null;
64
65 className = (classNamePrefix + "_" + jdbcVersionName);
66 theClass = java.lang.Class.forName(className);
67
68 result = theClass.getConstructor(paramTypes);
69
70 return result;
71 }
72
73
74 static private void init()
75 throws java.sql.SQLException
76 {
77 try
78 {
79 Class resultSetParamTypes[] =
80 {
81 java.lang.Class.forName("com.internetcds.jdbc.tds.Tds"),
82 java.lang.Class.forName("com.internetcds.jdbc.tds.Statement"),
83 java.lang.Class.forName("com.internetcds.jdbc.tds.Columns")
84 };
85 Class preparedStatementParamTypes[] =
86 {
87 java.lang.Class.forName("java.sql.Connection"),
88 java.lang.Class.forName("com.internetcds.jdbc.tds.Tds"),
89 java.lang.Class.forName("java.lang.String")
90 };
91 Class callableStatementParamTypes[] =
92 {
93 java.lang.Class.forName("java.sql.Connection"),
94 java.lang.Class.forName("com.internetcds.jdbc.tds.Tds"),
95 java.lang.Class.forName("java.lang.String")
96 };
97 Class connectionParamTypes[] =
98 {
99 java.lang.Class.forName("java.util.Properties")
100 };
101
102
103 try
104 {
105 Class statement = java.lang.Class.forName("java.sql.Statement");
106 java.lang.reflect.Method execBatch =
107 statement.getDeclaredMethod("executeBatch", new Class [0]);
108
109 jdbcVersion = JDBC2_0;
110 jdbcVersionName = "2_0";
111 }
112 catch (NoSuchMethodException nsme)
113 {
114 jdbcVersion = JDBC1_0;
115 jdbcVersionName = "1_0";
116 }
117
118 try
119 {
120 resultSetCtor = getCtor("com.internetcds.jdbc.tds.ResultSet",
121 resultSetParamTypes);
122 preparedStatementCtor = getCtor("com.internetcds.jdbc.tds.PreparedStatement",
123 preparedStatementParamTypes);
124 callableStatementCtor = getCtor("com.internetcds.jdbc.tds.CallableStatement",
125 callableStatementParamTypes);
126 connectionCtor = getCtor("com.internetcds.jdbc.tds.Connection",
127 connectionParamTypes);
128 }
129 catch(java.lang.ClassNotFoundException e)
130 {
131 if (jdbcVersion == JDBC2_0)
132 {
133 jdbcVersion = JDBC1_0;
138 jdbcVersionName = "1_0";
139 resultSetCtor = getCtor("com.internetcds.jdbc.tds.ResultSet",
140 resultSetParamTypes);
141 preparedStatementCtor = getCtor("com.internetcds.jdbc.tds.PreparedStatement",
142 preparedStatementParamTypes);
143 callableStatementCtor = getCtor("com.internetcds.jdbc.tds.CallableStatement",
144 callableStatementParamTypes);
145 connectionCtor = getCtor("com.internetcds.jdbc.tds.Connection",
146 connectionParamTypes);
147 }
148 }
149 }
150 catch(java.lang.ClassNotFoundException e)
151 {
152 System.err.println("Couldn't find the class"); throw new java.sql.SQLException (e.getMessage());
154 }
155 catch(java.lang.NoSuchMethodException e)
156 {
157 System.err.println("Couldn't find a constructor");
158 throw new java.sql.SQLException (e.getMessage());
159 }
160
161 dejavu = true;
162 }
163
164
165
166 public static java.sql.ResultSet newResultSet(
167 Tds tds_,
168 java.sql.Statement stmt_,
169 Columns columns_) throws java.sql.SQLException
170 {
171 if (!dejavu)
172 {
173 init();
174 }
175
176 java.sql.ResultSet result = null;
177 try
178 {
179 Object params[] = {tds_, stmt_, columns_};
180
181 result = (java.sql.ResultSet )resultSetCtor.newInstance(params);
182 }
183 catch (java.lang.reflect.InvocationTargetException e)
184 {
185 throw new java.sql.SQLException (e.getTargetException().getMessage());
186 }
187 catch (Throwable e)
188 {
189 e.printStackTrace();
190 throw new java.sql.SQLException (e.getMessage());
191 }
192 return result;
193 }
194
195 public static java.sql.CallableStatement newCallableStatement(
196 Object cx_,
197 com.internetcds.jdbc.tds.Tds tds_,
198 java.lang.String sql_) throws java.sql.SQLException
199 {
200 if (!dejavu)
201 {
202 init();
203 }
204
205 try
206 {
207 Object params[] = {cx_, tds_, sql_};
208
209 return (java.sql.CallableStatement )callableStatementCtor.newInstance(params);
210 }
211 catch (java.lang.reflect.InvocationTargetException e)
212 {
213 throw new java.sql.SQLException (e.getTargetException().getMessage());
214 }
215 catch (Throwable e)
216 {
217 throw new java.sql.SQLException (e.getMessage());
218 }
219 }
220
221
222 public static java.sql.PreparedStatement newPreparedStatement(
223 Object cx_,
224 com.internetcds.jdbc.tds.Tds tds_,
225 java.lang.String sql_) throws java.sql.SQLException
226 {
227 if (!dejavu)
228 {
229 init();
230 }
231
232 try
233 {
234 Object params[] = {cx_, tds_, sql_};
235
236 return (java.sql.PreparedStatement )preparedStatementCtor.newInstance(params);
237 }
238 catch (java.lang.reflect.InvocationTargetException e)
239 {
240 throw new java.sql.SQLException (e.getTargetException().getMessage());
241 }
242 catch (Throwable e)
243 {
244 throw new java.sql.SQLException (e.getMessage());
245 }
246 }
247
248
249 public static java.sql.Connection newConnection(
250 java.util.Properties props_)
251 throws java.sql.SQLException , com.internetcds.jdbc.tds.TdsException
252 {
253 if (!dejavu)
254 {
255 init();
256 }
257
258 try
259 {
260 Object params[] =
261 {
262 props_,
263 };
264
265 return (java.sql.Connection )connectionCtor.newInstance(params);
266 }
267 catch (java.lang.reflect.InvocationTargetException e)
268 {
269 throw new java.sql.SQLException (e.getTargetException().getMessage());
270 }
271 catch (Throwable e)
272 {
273 throw new java.sql.SQLException (e.getMessage());
274 }
275 }
276
277 }
278
279 |
Popular Tags |
Java API By Example, From Geeks To Geeks.