001: /**
002: * ========================================
003: * JFreeReport : a free Java report library
004: * ========================================
005: *
006: * Project Info: http://reporting.pentaho.org/
007: *
008: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009: *
010: * This library is free software; you can redistribute it and/or modify it under the terms
011: * of the GNU Lesser General Public License as published by the Free Software Foundation;
012: * either version 2.1 of the License, or (at your option) any later version.
013: *
014: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016: * See the GNU Lesser General Public License for more details.
017: *
018: * You should have received a copy of the GNU Lesser General Public License along with this
019: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020: * Boston, MA 02111-1307, USA.
021: *
022: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023: * in the United States and other countries.]
024: *
025: * ------------
026: * $Id: TableReportData.java 3048 2007-07-28 18:02:42Z tmorgner $
027: * ------------
028: * (C) Copyright 2000-2005, by Object Refinery Limited.
029: * (C) Copyright 2005-2007, by Pentaho Corporation.
030: */package org.jfree.report;
031:
032: import javax.swing.table.TableModel;
033:
034: /**
035: * Creation-Date: 19.02.2006, 17:00:10
036: *
037: * @author Thomas Morgner
038: */
039: public class TableReportData implements ReportData {
040: private TableModel tableModel;
041: private int cursor;
042: private int rowMax;
043: private int rowMin;
044: private int cursorMaxPosition;
045:
046: public TableReportData(final TableModel tableModel) {
047: this (tableModel, 0, tableModel.getRowCount());
048: }
049:
050: public TableReportData(final TableModel tableModel,
051: final int start, final int length) {
052: this .tableModel = tableModel;
053: this .rowMax = start + length;
054: this .rowMin = start;
055: this .cursorMaxPosition = length;
056: }
057:
058: public int getColumnCount() throws DataSourceException {
059: return tableModel.getColumnCount();
060: }
061:
062: public boolean isReadable() throws DataSourceException {
063: return cursor > 0 && cursor <= cursorMaxPosition;
064: }
065:
066: public boolean setCursorPosition(final int row)
067: throws DataSourceException {
068: if (row > cursorMaxPosition) {
069: return false;
070: } else if (row < 0) {
071: return false;
072: }
073: cursor = row;
074: return true;
075: }
076:
077: /**
078: * This operation checks, whether a call to next will be likely to succeed. If
079: * there is a next data row, this should return true.
080: *
081: * @return
082: * @throws org.jfree.report.DataSourceException
083: *
084: */
085: public boolean isAdvanceable() throws DataSourceException {
086: return cursor < cursorMaxPosition;
087: }
088:
089: public String getColumnName(final int column)
090: throws DataSourceException {
091: return tableModel.getColumnName(column);
092: }
093:
094: public Object get(final int column) throws DataSourceException {
095: if (isReadable() == false) {
096: throw new DataSourceException(
097: "Unable to read from datasource");
098: }
099: return tableModel.getValueAt(cursor - 1, column);
100: }
101:
102: public boolean next() throws DataSourceException {
103: if (cursor >= cursorMaxPosition) {
104: return false;
105: }
106:
107: cursor += 1;
108: return true;
109: }
110:
111: public void close() throws DataSourceException {
112: // does nothing ...
113: }
114:
115: public int getCursorPosition() throws DataSourceException {
116: return cursor;
117: }
118: }
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