svn-gvsig-desktop / trunk / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / engine / data / db / DBDataSourceAdapter.java @ 37927
History | View | Annotate | Download (7.94 KB)
1 |
package com.hardcode.gdbms.engine.data.db; |
---|---|
2 |
|
3 |
import java.sql.Connection; |
4 |
import java.sql.ResultSet; |
5 |
import java.sql.SQLException; |
6 |
import java.util.ArrayList; |
7 |
|
8 |
import com.hardcode.driverManager.Driver; |
9 |
import com.hardcode.driverManager.DriverLoadException; |
10 |
import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
11 |
import com.hardcode.gdbms.driver.exceptions.ReloadDriverException; |
12 |
import com.hardcode.gdbms.engine.data.AbstractDataSource; |
13 |
import com.hardcode.gdbms.engine.data.SourceInfo; |
14 |
import com.hardcode.gdbms.engine.data.driver.AlphanumericDBDriver; |
15 |
import com.hardcode.gdbms.engine.data.driver.DBDriver; |
16 |
import com.hardcode.gdbms.engine.data.driver.GDBMSDriver; |
17 |
import com.hardcode.gdbms.engine.data.edition.DataWare; |
18 |
import com.hardcode.gdbms.engine.values.Value; |
19 |
|
20 |
|
21 |
/**
|
22 |
* Adaptador de la interfaz DBDriver a la interfaz DataSource. Adapta las
|
23 |
* interfaces de los drivers de base de datos a la interfaz DataSource.
|
24 |
*
|
25 |
* @author Fernando Gonz?lez Cort?s
|
26 |
*/
|
27 |
public class DBDataSourceAdapter extends AbstractDataSource |
28 |
implements DBDataSource {
|
29 |
/*
|
30 |
* datos de la conexi?n
|
31 |
*/
|
32 |
protected String host; |
33 |
protected int port; |
34 |
protected String dbName; |
35 |
protected String user; |
36 |
protected String password; |
37 |
|
38 |
//driver de base de datos
|
39 |
protected DBDriver driver;
|
40 |
|
41 |
//objetos jdbc
|
42 |
protected Connection con; |
43 |
|
44 |
//Instrucci?n sql completa que representa el dataSource
|
45 |
protected String sql; |
46 |
|
47 |
/**
|
48 |
* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getRowCount()
|
49 |
*/
|
50 |
public long getRowCount() throws ReadDriverException { |
51 |
return ((DBDriver)getDriver()).getRowCount();
|
52 |
} |
53 |
|
54 |
/**
|
55 |
* Establece el driver
|
56 |
*
|
57 |
* @param driver The driver to set.
|
58 |
*/
|
59 |
public void setDriver(DBDriver driver) { |
60 |
this.driver = driver;
|
61 |
} |
62 |
|
63 |
/**
|
64 |
* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldCount()
|
65 |
*/
|
66 |
public int getFieldCount() throws ReadDriverException { |
67 |
return ((DBDriver)getDriver()).getFieldCount();
|
68 |
} |
69 |
|
70 |
/**
|
71 |
* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldName(int)
|
72 |
*/
|
73 |
public String getFieldName(int fieldId) throws ReadDriverException { |
74 |
return ((DBDriver)getDriver()).getFieldName(fieldId);
|
75 |
} |
76 |
|
77 |
/**
|
78 |
* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldType(int)
|
79 |
*/
|
80 |
public int getFieldType(int i) throws ReadDriverException { |
81 |
return ((DBDriver)getDriver()).getFieldType(i);
|
82 |
} |
83 |
|
84 |
/**
|
85 |
* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldValue(long,
|
86 |
* int)
|
87 |
*/
|
88 |
public Value getFieldValue(long rowIndex, int fieldId) |
89 |
throws ReadDriverException {
|
90 |
return ((DBDriver)getDriver()).getFieldValue(rowIndex, fieldId);
|
91 |
} |
92 |
|
93 |
/**
|
94 |
* DOCUMENT ME!
|
95 |
*
|
96 |
* @return
|
97 |
*/
|
98 |
public Driver getDriver() { |
99 |
return driver;
|
100 |
} |
101 |
|
102 |
/**
|
103 |
* @see com.hardcode.gdbms.engine.data.DataSource#setSourceInfo(com.hardcode.gdbms.engine.data.driver.DriverInfo)
|
104 |
*/
|
105 |
public void setSourceInfo(SourceInfo sourceInfo) { |
106 |
super.setSourceInfo(sourceInfo);
|
107 |
|
108 |
this.host = ((DBSourceInfo) sourceInfo).host;
|
109 |
this.port = ((DBSourceInfo) sourceInfo).port;
|
110 |
this.dbName = ((DBSourceInfo) sourceInfo).dbName;
|
111 |
this.user = ((DBSourceInfo) sourceInfo).user;
|
112 |
this.password = ((DBSourceInfo) sourceInfo).password;
|
113 |
this.tableName = ((DBTableSourceInfo) sourceInfo).tableName;
|
114 |
this.con =((DBTableSourceInfo) sourceInfo).connection;
|
115 |
|
116 |
this.sql = "SELECT * FROM " + tableName; |
117 |
} |
118 |
|
119 |
/**
|
120 |
* @see com.hardcode.gdbms.engine.data.db.DBDataSource#execute(java.lang.String)
|
121 |
*/
|
122 |
public void execute(String sql) throws ReadDriverException { |
123 |
try {
|
124 |
((DBDriver)getDriver()).execute(this.getConnection(), sql);
|
125 |
} catch (SQLException e) { |
126 |
throw new ReadDriverException(getName(),e); |
127 |
} |
128 |
} |
129 |
|
130 |
protected String tableName; |
131 |
protected int sem = 0; |
132 |
private int[] cachedPKIndices = null; |
133 |
|
134 |
/**
|
135 |
* Get's a connection to the driver
|
136 |
*
|
137 |
* @return Connection
|
138 |
*
|
139 |
* @throws SQLException if the connection cannot be established
|
140 |
*/
|
141 |
public Connection getConnection() throws SQLException { |
142 |
if (this.con == null) { |
143 |
return driver.getConnection(host, port, dbName, user, password);
|
144 |
} |
145 |
else {
|
146 |
return this.con; |
147 |
} |
148 |
} |
149 |
|
150 |
/**
|
151 |
* @see com.hardcode.gdbms.engine.data.DataSource#start()
|
152 |
*/
|
153 |
public void start() throws ReadDriverException { |
154 |
try {
|
155 |
if (sem == 0) { |
156 |
con = getConnection(); |
157 |
((AlphanumericDBDriver) driver).open(con, sql); |
158 |
// driver.setSourceInfo(this.getSourceInfo());
|
159 |
|
160 |
} |
161 |
|
162 |
sem++; |
163 |
} catch (SQLException e) { |
164 |
throw new ReadDriverException(getName(),e); |
165 |
} |
166 |
} |
167 |
|
168 |
/**
|
169 |
* @see com.hardcode.gdbms.engine.data.DataSource#stop()
|
170 |
*/
|
171 |
public void stop() throws ReadDriverException { |
172 |
try {
|
173 |
sem--; |
174 |
|
175 |
if (sem == 0) { |
176 |
driver.close(); |
177 |
if (this.con != null) { |
178 |
con.close(); |
179 |
con = null;
|
180 |
} |
181 |
} else if (sem < 0) { |
182 |
throw new RuntimeException("DataSource closed too many times"); |
183 |
} |
184 |
} catch (SQLException e) { |
185 |
throw new ReadDriverException(getName(),e); |
186 |
} |
187 |
} |
188 |
|
189 |
/**
|
190 |
* @see com.hardcode.gdbms.engine.data.DataSource#getDBMS()
|
191 |
*/
|
192 |
public String getDBMS() { |
193 |
return ((DBSourceInfo)sourceInfo).dbms;
|
194 |
} |
195 |
|
196 |
/**
|
197 |
* @see com.hardcode.gdbms.engine.data.DataSource#getName()
|
198 |
*/
|
199 |
public String getName() { |
200 |
return sourceInfo.name;
|
201 |
} |
202 |
|
203 |
/**
|
204 |
* @see com.hardcode.gdbms.engine.data.DataSource#getPrimaryKeys()
|
205 |
*/
|
206 |
public int[] getPrimaryKeys() throws ReadDriverException { |
207 |
if (cachedPKIndices == null) { |
208 |
try {
|
209 |
//Gets the pk column names
|
210 |
Connection c = getConnection();
|
211 |
ResultSet rs = c.getMetaData().getPrimaryKeys(null, null, |
212 |
driver.getInternalTableName(tableName)); |
213 |
ArrayList pks = new ArrayList(); |
214 |
|
215 |
while (rs.next()) {
|
216 |
pks.add(rs.getString("COLUMN_NAME"));
|
217 |
} |
218 |
|
219 |
//create the index array
|
220 |
cachedPKIndices = new int[pks.size()]; |
221 |
|
222 |
for (int i = 0; i < cachedPKIndices.length; i++) { |
223 |
cachedPKIndices[i] = getFieldIndexByName((String) pks.get(i));
|
224 |
} |
225 |
} catch (SQLException e) { |
226 |
throw new ReadDriverException(getName(),e); |
227 |
} |
228 |
} |
229 |
|
230 |
return cachedPKIndices;
|
231 |
} |
232 |
|
233 |
/**
|
234 |
* @see com.hardcode.gdbms.engine.data.DataSource#getDataWare(int)
|
235 |
*/
|
236 |
public DataWare getDataWare(int mode) throws ReadDriverException { |
237 |
try {
|
238 |
DBDataWare dw = DBDataSourceFactory.newDataWareInstance(((DBDriver)getDriver()), mode); |
239 |
DBDriver driver; |
240 |
driver = (DBDriver) getDataSourceFactory().getDriverManager().getDriver(getDriver().getName()); |
241 |
((GDBMSDriver) driver).setDataSourceFactory(getDataSourceFactory()); |
242 |
dw.setDriver(driver); |
243 |
dw.setDataSourceFactory(dsf); |
244 |
dw.setSourceInfo(getSourceInfo()); |
245 |
return dw;
|
246 |
} catch (DriverLoadException e) {
|
247 |
throw new ReadDriverException(getName(),e); |
248 |
} |
249 |
|
250 |
} |
251 |
|
252 |
public int getFieldWidth(int i) throws ReadDriverException { |
253 |
return ((DBDriver)getDriver()).getFieldWidth(i);
|
254 |
} |
255 |
|
256 |
public void reload() throws ReloadDriverException { |
257 |
try {
|
258 |
sem = 0;
|
259 |
|
260 |
driver.close(); |
261 |
if (this.con == null) { |
262 |
con.close(); |
263 |
con = null;
|
264 |
} |
265 |
|
266 |
this.start();
|
267 |
} catch (SQLException e) { |
268 |
throw new ReloadDriverException(getName(),e); |
269 |
} catch (ReadDriverException e) {
|
270 |
throw new ReloadDriverException(getName(),e); |
271 |
} |
272 |
this.raiseEventReloaded();
|
273 |
|
274 |
} |
275 |
} |