1 /* AbstractTableModel.java -- 2 Copyright (C) 2002, 2004, 2005, 2006, Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package javax.swing.table; 40 41 import gnu.java.lang.CPStringBuilder; 42 43 import java.io.Serializable; 44 import java.util.EventListener; 45 46 import javax.swing.event.EventListenerList; 47 import javax.swing.event.TableModelEvent; 48 import javax.swing.event.TableModelListener; 49 50 /** 51 * A base class that can be used to create implementations of the 52 * {@link TableModel} interface. 53 * 54 * @author Andrew Selkirk 55 */ 56 public abstract class AbstractTableModel implements TableModel, Serializable 57 { 58 static final long serialVersionUID = -5798593159423650347L; 59 60 /** 61 * Storage for the listeners registered with this model. 62 */ 63 protected EventListenerList listenerList = new EventListenerList(); 64 65 /** 66 * Creates a default instance. 67 */ AbstractTableModel()68 public AbstractTableModel() 69 { 70 // no setup required here 71 } 72 73 /** 74 * Returns the name of the specified column. This method generates default 75 * names in a sequence (starting with column 0): A, B, C, ..., Z, AA, AB, 76 * AC, ..., AZ, BA, BB, BC, and so on. Subclasses may override this method 77 * to allow column names to be specified on some other basis. 78 * 79 * @param columnIndex the column index. 80 * 81 * @return The name of the column. 82 */ getColumnName(int columnIndex)83 public String getColumnName(int columnIndex) 84 { 85 CPStringBuilder buffer = new CPStringBuilder(); 86 while (columnIndex >= 0) 87 { 88 buffer.insert(0, (char) ('A' + columnIndex % 26)); 89 columnIndex = columnIndex / 26 - 1; 90 } 91 return buffer.toString(); 92 } 93 94 /** 95 * Return the index of the specified column, or <code>-1</code> if there is 96 * no column with the specified name. 97 * 98 * @param columnName the name of the column (<code>null</code> not permitted). 99 * 100 * @return The index of the column, -1 if not found. 101 * 102 * @see #getColumnName(int) 103 * @throws NullPointerException if <code>columnName</code> is 104 * <code>null</code>. 105 */ findColumn(String columnName)106 public int findColumn(String columnName) 107 { 108 int count = getColumnCount(); 109 110 for (int index = 0; index < count; index++) 111 { 112 String name = getColumnName(index); 113 114 if (columnName.equals(name)) 115 return index; 116 } 117 118 // Unable to locate. 119 return -1; 120 } 121 122 /** 123 * Returns the <code>Class</code> for all <code>Object</code> instances 124 * in the specified column. 125 * 126 * @param columnIndex the column index. 127 * 128 * @return The class. 129 */ getColumnClass(int columnIndex)130 public Class<?> getColumnClass(int columnIndex) 131 { 132 return Object.class; 133 } 134 135 /** 136 * Returns <code>true</code> if the specified cell is editable, and 137 * <code>false</code> if it is not. This implementation returns 138 * <code>false</code> for all arguments, subclasses should override the 139 * method if necessary. 140 * 141 * @param rowIndex the row index of the cell. 142 * @param columnIndex the column index of the cell. 143 * 144 * @return <code>false</code>. 145 */ isCellEditable(int rowIndex, int columnIndex)146 public boolean isCellEditable(int rowIndex, int columnIndex) 147 { 148 return false; 149 } 150 151 /** 152 * Sets the value of the given cell. This implementation ignores all 153 * arguments and does nothing, subclasses should override the 154 * method if necessary. 155 * 156 * @param value the new value (<code>null</code> permitted). 157 * @param rowIndex the row index of the cell. 158 * @param columnIndex the column index of the cell. 159 */ setValueAt(Object value, int rowIndex, int columnIndex)160 public void setValueAt(Object value, int rowIndex, int columnIndex) 161 { 162 // Do nothing... 163 } 164 165 /** 166 * Adds a listener to the table model. The listener will receive notification 167 * of all changes to the table model. 168 * 169 * @param listener the listener. 170 */ addTableModelListener(TableModelListener listener)171 public void addTableModelListener(TableModelListener listener) 172 { 173 listenerList.add(TableModelListener.class, listener); 174 } 175 176 /** 177 * Removes a listener from the table model so that it will no longer receive 178 * notification of changes to the table model. 179 * 180 * @param listener the listener to remove. 181 */ removeTableModelListener(TableModelListener listener)182 public void removeTableModelListener(TableModelListener listener) 183 { 184 listenerList.remove(TableModelListener.class, listener); 185 } 186 187 /** 188 * Returns an array containing the listeners that have been added to the 189 * table model. 190 * 191 * @return Array of {@link TableModelListener} objects. 192 * 193 * @since 1.4 194 */ getTableModelListeners()195 public TableModelListener[] getTableModelListeners() 196 { 197 return (TableModelListener[]) 198 listenerList.getListeners(TableModelListener.class); 199 } 200 201 /** 202 * Sends a {@link TableModelEvent} to all registered listeners to inform 203 * them that the table data has changed. 204 */ fireTableDataChanged()205 public void fireTableDataChanged() 206 { 207 fireTableChanged(new TableModelEvent(this, 0, Integer.MAX_VALUE)); 208 } 209 210 /** 211 * Sends a {@link TableModelEvent} to all registered listeners to inform 212 * them that the table structure has changed. 213 */ fireTableStructureChanged()214 public void fireTableStructureChanged() 215 { 216 fireTableChanged(new TableModelEvent(this, TableModelEvent.HEADER_ROW)); 217 } 218 219 /** 220 * Sends a {@link TableModelEvent} to all registered listeners to inform 221 * them that some rows have been inserted into the model. 222 * 223 * @param firstRow the index of the first row. 224 * @param lastRow the index of the last row. 225 */ fireTableRowsInserted(int firstRow, int lastRow)226 public void fireTableRowsInserted(int firstRow, int lastRow) 227 { 228 fireTableChanged(new TableModelEvent(this, firstRow, lastRow, 229 TableModelEvent.ALL_COLUMNS, 230 TableModelEvent.INSERT)); 231 } 232 233 /** 234 * Sends a {@link TableModelEvent} to all registered listeners to inform 235 * them that some rows have been updated. 236 * 237 * @param firstRow the index of the first row. 238 * @param lastRow the index of the last row. 239 */ fireTableRowsUpdated(int firstRow, int lastRow)240 public void fireTableRowsUpdated(int firstRow, int lastRow) 241 { 242 fireTableChanged(new TableModelEvent(this, firstRow, lastRow, 243 TableModelEvent.ALL_COLUMNS, 244 TableModelEvent.UPDATE)); 245 } 246 247 /** 248 * Sends a {@link TableModelEvent} to all registered listeners to inform 249 * them that some rows have been deleted from the model. 250 * 251 * @param firstRow the index of the first row. 252 * @param lastRow the index of the last row. 253 */ fireTableRowsDeleted(int firstRow, int lastRow)254 public void fireTableRowsDeleted(int firstRow, int lastRow) 255 { 256 fireTableChanged(new TableModelEvent(this, firstRow, lastRow, 257 TableModelEvent.ALL_COLUMNS, 258 TableModelEvent.DELETE)); 259 } 260 261 /** 262 * Sends a {@link TableModelEvent} to all registered listeners to inform 263 * them that a single cell has been updated. 264 * 265 * @param row the row index. 266 * @param column the column index. 267 */ fireTableCellUpdated(int row, int column)268 public void fireTableCellUpdated(int row, int column) 269 { 270 fireTableChanged(new TableModelEvent(this, row, row, column)); 271 } 272 273 /** 274 * Sends the specified event to all registered listeners. 275 * 276 * @param event the event to send. 277 */ fireTableChanged(TableModelEvent event)278 public void fireTableChanged(TableModelEvent event) 279 { 280 int index; 281 TableModelListener listener; 282 Object[] list = listenerList.getListenerList(); 283 284 for (index = 0; index < list.length; index += 2) 285 { 286 listener = (TableModelListener) list [index + 1]; 287 listener.tableChanged(event); 288 } 289 } 290 291 /** 292 * Returns an array of listeners of the given type that are registered with 293 * this model. 294 * 295 * @param listenerType the listener class. 296 * 297 * @return An array of listeners (possibly empty). 298 */ getListeners(Class<T> listenerType)299 public <T extends EventListener> T[] getListeners(Class<T> listenerType) 300 { 301 return listenerList.getListeners(listenerType); 302 } 303 } 304