01: /**
02: * ===========================================
03: * JFreeReport : a free Java reporting library
04: * ===========================================
05: *
06: * Project Info: http://reporting.pentaho.org/
07: *
08: * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
09: *
10: * This library is free software; you can redistribute it and/or modify it under the terms
11: * of the GNU Lesser General Public License as published by the Free Software Foundation;
12: * either version 2.1 of the License, or (at your option) any later version.
13: *
14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16: * See the GNU Lesser General Public License for more details.
17: *
18: * You should have received a copy of the GNU Lesser General Public License along with this
19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20: * Boston, MA 02111-1307, USA.
21: *
22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
23: * in the United States and other countries.]
24: *
25: * ------------
26: * BeginDetailsHandler.java
27: * ------------
28: * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
29: */package org.jfree.report.states.process;
30:
31: import org.jfree.report.ReportProcessingException;
32: import org.jfree.report.RootLevelBand;
33: import org.jfree.report.event.ReportEvent;
34:
35: /**
36: * Creation-Date: 03.07.2007, 13:57:49
37: *
38: * @author Thomas Morgner
39: */
40: public class BeginDetailsHandler implements AdvanceHandler {
41: public static final BeginDetailsHandler HANDLER = new BeginDetailsHandler();
42:
43: private BeginDetailsHandler() {
44: }
45:
46: public int getEventCode() {
47: return ReportEvent.ITEMS_STARTED;
48: }
49:
50: public ProcessState advance(final ProcessState state)
51: throws ReportProcessingException {
52: final ProcessState next = state.deriveForAdvance();
53: next.firePrepareEvent();
54: // if there is no data in the report's data source, this now prints the No-Data-Band.
55: next.fireReportEvent();
56: return next;
57: }
58:
59: public ProcessState commit(final ProcessState next)
60: throws ReportProcessingException {
61: if (next.getNumberOfRows() > 0) {
62: next.setAdvanceHandler(ProcessDetailsHandler.HANDLER);
63: return next;
64: }
65:
66: next.setAdvanceHandler(EndDetailsHandler.HANDLER);
67:
68: final RootLevelBand rootLevelBand = next.getReport()
69: .getNoDataBand();
70: if (rootLevelBand.getSubReportCount() == 0) {
71: return next;
72: }
73:
74: return new ProcessState(rootLevelBand.getSubReports(), 0, next);
75: }
76:
77: public boolean isFinish() {
78: return false;
79: }
80: }
|