Source Code Cross Referenced for TableReportData.java in  » Report » pentaho-report » org » jfree » report » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » pentaho report » org.jfree.report 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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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