1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2001-2004 Open World Ltd
4 //
5 // This file is part of MillScript.
6 //
7 // MillScript is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.millscript.functions;
22
23 import org.millscript.millscript.vm.Machine;
24
25 import java.util.Calendar;
26
27 /**
28 * This class implements the MillScript date-field functions.
29 */
30 public class DateFieldFunction extends Function {
31
32 /**
33 * The Calendar field we want to access.
34 */
35 private final int field;
36
37 /**
38 * The offset to add to the value of the Calendar field. e.g. we might want
39 * to add one to the value of the month.
40 */
41 private final int offset;
42
43 /**
44 * Constructs a new function to access the specified date field, with the
45 * specified offset from the date field value.
46 *
47 * @param f the Calendar field to access
48 * @param o the offset for the Calendar field
49 */
50 public DateFieldFunction( final int f, final int o ) {
51 this.field = f;
52 this.offset = o;
53 }
54
55 /**
56 * @see org.millscript.millscript.functions.Function#apply(org.millscript.millscript.vm.Machine, int)
57 */
58 @Override
59 public void apply( final Machine mc, final int nargs ) {
60 checkNargs( mc, 1, nargs );
61 Calendar cal = mc.popCalendar();
62 mc.pushObject( new Integer( cal.get( field ) + offset ) );
63 }
64
65 }