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Java > Open Source Codes > jimm > datavision > gui > cmd > DbConnCommand


1 package jimm.datavision.gui.cmd;
2 import jimm.datavision.Report;
3 import jimm.datavision.ErrorHandler;
4 import jimm.datavision.source.sql.Database;
5 import jimm.util.I18N;
6
7 /**
8  * A command for changing a database's connection information.
9  *
10  * @author Jim Menard, <a HREF="mailto:jimm@io.com">jimm@io.com</a>
11  */
12 public class DbConnCommand extends CommandAdapter {
13
14 protected Report report;
15 protected Database origDatabase;
16 protected String JavaDoc driverClassName;
17 protected String JavaDoc connInfo;
18 protected String JavaDoc dbName;
19 protected String JavaDoc username;
20 private String JavaDoc password;
21
22 /**
23  * Constructor.
24  *
25  * @param report the report using this database
26  * @param driverClassName database driver class name
27  * @param connInfo database connection info string
28  * @param dbName the database name
29  * @param username the user name to use when logging in to the database
30  * @param password the database password
31  */
32 public DbConnCommand(Report report, String JavaDoc driverClassName,
33              String JavaDoc connInfo, String JavaDoc dbName, String JavaDoc username,
34              String JavaDoc password)
35 {
36     super(I18N.get("DbConnCommand.name"));
37
38     origDatabase = (Database)report.getDataSource();
39     this.report = report;
40     this.driverClassName = driverClassName;
41     this.connInfo = connInfo;
42     this.dbName = dbName;
43     this.username = (username == null) ? "" : username;
44     this.password = password;
45 }
46
47 public void perform() {
48     Database db = origDatabase;
49     try {
50     if (db == null) {
51         db = new Database(driverClassName, connInfo, report, dbName,
52                   username, password);
53         report.setDataSource(db);
54     }
55     else {
56         db.reset(driverClassName, connInfo, dbName, username, password);
57     }
58     }
59     catch (Exception JavaDoc e) {
60     ErrorHandler.error(e, I18N.get("DbConnWin.connect_error"));
61     }
62 }
63
64 public void undo() {
65     try {
66     if (origDatabase == null)
67         report.setDataSource(null);
68     else
69         origDatabase.reset(driverClassName, connInfo, dbName, username,
70                    password);
71     }
72     catch (Exception JavaDoc e) {
73     ErrorHandler.error(I18N.get("DbConnWin.revert_error") + "\n" + e,
74                I18N.get("DbConnWin.revert_error_title"));
75     }
76 }
77
78 }
79
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