01: /**
02: * com.mckoi.database.interpret.CompleteTransaction 14 Sep 2001
03: *
04: * Mckoi SQL Database ( http://www.mckoi.com/database )
05: * Copyright (C) 2000, 2001, 2002 Diehl and Associates, Inc.
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * Version 2 as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: * GNU General Public License Version 2 for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * Version 2 along with this program; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19: *
20: * Change Log:
21: *
22: *
23: */package com.mckoi.database.interpret;
24:
25: import com.mckoi.database.*;
26: import java.util.ArrayList;
27: import java.util.List;
28:
29: /**
30: * This represents either a COMMIT or ROLLBACK SQL command.
31: *
32: * @author Tobias Downer
33: */
34:
35: public class CompleteTransaction extends Statement {
36:
37: String command; // This is set to either 'commit' or 'rollback'
38:
39: // ---------- Implemented from Statement ----------
40:
41: public void prepare() throws DatabaseException {
42: command = (String) cmd.getObject("command");
43: }
44:
45: public Table evaluate() throws DatabaseException,
46: TransactionException {
47:
48: DatabaseQueryContext context = new DatabaseQueryContext(
49: database);
50:
51: if (command.equals("commit")) {
52: // try {
53: // Commit the current transaction on this connection.
54: database.commit();
55: // }
56: // catch (TransactionException e) {
57: // // This needs to be handled better!
58: // Debug.writeException(e);
59: // throw new DatabaseException(e.getMessage());
60: // }
61: return FunctionTable.resultTable(context, 0);
62: } else if (command.equals("rollback")) {
63: // Rollback the current transaction on this connection.
64: database.rollback();
65: return FunctionTable.resultTable(context, 0);
66: } else {
67: throw new Error(
68: "Unrecognised transaction completion command.");
69: }
70:
71: }
72:
73: }
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