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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package javax.swing.table; | ||
| 27 | |||
| 28 | import java.io.Serializable; | ||
| 29 | import java.util.Vector; | ||
| 30 | import java.util.Enumeration; | ||
| 31 | import javax.swing.event.TableModelEvent; | ||
| 32 | |||
| 33 | |||
| 34 | /** | ||
| 35 | * This is an implementation of <code>TableModel</code> that | ||
| 36 | * uses a <code>Vector</code> of <code>Vectors</code> to store the | ||
| 37 | * cell value objects. | ||
| 38 | * <p> | ||
| 39 | * <strong>Warning:</strong> <code>DefaultTableModel</code> returns a | ||
| 40 | * column class of <code>Object</code>. When | ||
| 41 | * <code>DefaultTableModel</code> is used with a | ||
| 42 | * <code>TableRowSorter</code> this will result in extensive use of | ||
| 43 | * <code>toString</code>, which for non-<code>String</code> data types | ||
| 44 | * is expensive. If you use <code>DefaultTableModel</code> with a | ||
| 45 | * <code>TableRowSorter</code> you are strongly encouraged to override | ||
| 46 | * <code>getColumnClass</code> to return the appropriate type. | ||
| 47 | * <p> | ||
| 48 | * <strong>Warning:</strong> | ||
| 49 | * Serialized objects of this class will not be compatible with | ||
| 50 | * future Swing releases. The current serialization support is | ||
| 51 | * appropriate for short term storage or RMI between applications running | ||
| 52 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 53 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 54 | * has been added to the <code>java.beans</code> package. | ||
| 55 | * Please see {@link java.beans.XMLEncoder}. | ||
| 56 | * | ||
| 57 | * @author Philip Milne | ||
| 58 | * | ||
| 59 | * @see TableModel | ||
| 60 | * @see #getDataVector | ||
| 61 | */ | ||
| 62 | public class DefaultTableModel extends AbstractTableModel implements Serializable { | ||
| 63 | |||
| 64 | // | ||
| 65 | // Instance Variables | ||
| 66 | // | ||
| 67 | |||
| 68 | /** | ||
| 69 | * The <code>Vector</code> of <code>Vectors</code> of | ||
| 70 | * <code>Object</code> values. | ||
| 71 | */ | ||
| 72 | protected Vector dataVector; | ||
| 73 | |||
| 74 | /** The <code>Vector</code> of column identifiers. */ | ||
| 75 | protected Vector columnIdentifiers; | ||
| 76 | |||
| 77 | // | ||
| 78 | // Constructors | ||
| 79 | // | ||
| 80 | |||
| 81 | /** | ||
| 82 | * Constructs a default <code>DefaultTableModel</code> | ||
| 83 | * which is a table of zero columns and zero rows. | ||
| 84 | */ | ||
| 85 | public DefaultTableModel() { | ||
| 86 | this(0, 0); | ||
| 87 | } | ||
| 88 | |||
| 89 | private static Vector newVector(int size) { | ||
| 90 | Vector v = new Vector(size); | ||
| 91 | v.setSize(size); | ||
| 92 | return v; | ||
| 93 | } | ||
| 94 | |||
| 95 | /** | ||
| 96 | * Constructs a <code>DefaultTableModel</code> with | ||
| 97 | * <code>rowCount</code> and <code>columnCount</code> of | ||
| 98 | * <code>null</code> object values. | ||
| 99 | * | ||
| 100 | * @param rowCount the number of rows the table holds | ||
| 101 | * @param columnCount the number of columns the table holds | ||
| 102 | * | ||
| 103 | * @see #setValueAt | ||
| 104 | */ | ||
| 105 | public DefaultTableModel(int rowCount, int columnCount) { | ||
| 106 | this(newVector(columnCount), rowCount); | ||
| 107 | } | ||
| 108 | |||
| 109 | /** | ||
| 110 | * Constructs a <code>DefaultTableModel</code> with as many columns | ||
| 111 | * as there are elements in <code>columnNames</code> | ||
| 112 | * and <code>rowCount</code> of <code>null</code> | ||
| 113 | * object values. Each column's name will be taken from | ||
| 114 | * the <code>columnNames</code> vector. | ||
| 115 | * | ||
| 116 | * @param columnNames <code>vector</code> containing the names | ||
| 117 | * of the new columns; if this is | ||
| 118 | * <code>null</code> then the model has no columns | ||
| 119 | * @param rowCount the number of rows the table holds | ||
| 120 | * @see #setDataVector | ||
| 121 | * @see #setValueAt | ||
| 122 | */ | ||
| 123 | public DefaultTableModel(Vector columnNames, int rowCount) { | ||
| 124 | setDataVector(newVector(rowCount), columnNames); | ||
| 125 | } | ||
| 126 | |||
| 127 | /** | ||
| 128 | * Constructs a <code>DefaultTableModel</code> with as many | ||
| 129 | * columns as there are elements in <code>columnNames</code> | ||
| 130 | * and <code>rowCount</code> of <code>null</code> | ||
| 131 | * object values. Each column's name will be taken from | ||
| 132 | * the <code>columnNames</code> array. | ||
| 133 | * | ||
| 134 | * @param columnNames <code>array</code> containing the names | ||
| 135 | * of the new columns; if this is | ||
| 136 | * <code>null</code> then the model has no columns | ||
| 137 | * @param rowCount the number of rows the table holds | ||
| 138 | * @see #setDataVector | ||
| 139 | * @see #setValueAt | ||
| 140 | */ | ||
| 141 | public DefaultTableModel(Object[] columnNames, int rowCount) { | ||
| 142 | this(convertToVector(columnNames), rowCount); | ||
| 143 | } | ||
| 144 | |||
| 145 | /** | ||
| 146 | * Constructs a <code>DefaultTableModel</code> and initializes the table | ||
| 147 | * by passing <code>data</code> and <code>columnNames</code> | ||
| 148 | * to the <code>setDataVector</code> method. | ||
| 149 | * | ||
| 150 | * @param data the data of the table, a <code>Vector</code> | ||
| 151 | * of <code>Vector</code>s of <code>Object</code> | ||
| 152 | * values | ||
| 153 | * @param columnNames <code>vector</code> containing the names | ||
| 154 | * of the new columns | ||
| 155 | * @see #getDataVector | ||
| 156 | * @see #setDataVector | ||
| 157 | */ | ||
| 158 | public DefaultTableModel(Vector data, Vector columnNames) { | ||
| 159 | setDataVector(data, columnNames); | ||
| 160 | } | ||
| 161 | |||
| 162 | /** | ||
| 163 | * Constructs a <code>DefaultTableModel</code> and initializes the table | ||
| 164 | * by passing <code>data</code> and <code>columnNames</code> | ||
| 165 | * to the <code>setDataVector</code> | ||
| 166 | * method. The first index in the <code>Object[][]</code> array is | ||
| 167 | * the row index and the second is the column index. | ||
| 168 | * | ||
| 169 | * @param data the data of the table | ||
| 170 | * @param columnNames the names of the columns | ||
| 171 | * @see #getDataVector | ||
| 172 | * @see #setDataVector | ||
| 173 | */ | ||
| 174 | public DefaultTableModel(Object[][] data, Object[] columnNames) { | ||
| 175 | setDataVector(data, columnNames); | ||
| 176 | } | ||
| 177 | |||
| 178 | /** | ||
| 179 | * Returns the <code>Vector</code> of <code>Vectors</code> | ||
| 180 | * that contains the table's | ||
| 181 | * data values. The vectors contained in the outer vector are | ||
| 182 | * each a single row of values. In other words, to get to the cell | ||
| 183 | * at row 1, column 5: <p> | ||
| 184 | * | ||
| 185 | * <code>((Vector)getDataVector().elementAt(1)).elementAt(5);</code><p> | ||
| 186 | * | ||
| 187 | * @return the vector of vectors containing the tables data values | ||
| 188 | * | ||
| 189 | * @see #newDataAvailable | ||
| 190 | * @see #newRowsAdded | ||
| 191 | * @see #setDataVector | ||
| 192 | */ | ||
| 193 | public Vector getDataVector() { | ||
| 194 | return dataVector; | ||
| 195 | } | ||
| 196 | |||
| 197 | private static Vector nonNullVector(Vector v) { | ||
| 198 | return (v != null) ? v : new Vector(); | ||
| 199 | } | ||
| 200 | |||
| 201 | /** | ||
| 202 | * Replaces the current <code>dataVector</code> instance variable | ||
| 203 | * with the new <code>Vector</code> of rows, <code>dataVector</code>. | ||
| 204 | * Each row is represented in <code>dataVector</code> as a | ||
| 205 | * <code>Vector</code> of <code>Object</code> values. | ||
| 206 | * <code>columnIdentifiers</code> are the names of the new | ||
| 207 | * columns. The first name in <code>columnIdentifiers</code> is | ||
| 208 | * mapped to column 0 in <code>dataVector</code>. Each row in | ||
| 209 | * <code>dataVector</code> is adjusted to match the number of | ||
| 210 | * columns in <code>columnIdentifiers</code> | ||
| 211 | * either by truncating the <code>Vector</code> if it is too long, | ||
| 212 | * or adding <code>null</code> values if it is too short. | ||
| 213 | * <p>Note that passing in a <code>null</code> value for | ||
| 214 | * <code>dataVector</code> results in unspecified behavior, | ||
| 215 | * an possibly an exception. | ||
| 216 | * | ||
| 217 | * @param dataVector the new data vector | ||
| 218 | * @param columnIdentifiers the names of the columns | ||
| 219 | * @see #getDataVector | ||
| 220 | */ | ||
| 221 | public void setDataVector(Vector dataVector, Vector columnIdentifiers) { | ||
| 222 | this.dataVector = nonNullVector(dataVector); | ||
| 223 | this.columnIdentifiers = nonNullVector(columnIdentifiers); | ||
| 224 | justifyRows(0, getRowCount()); | ||
| 225 | fireTableStructureChanged(); | ||
| 226 | } | ||
| 227 | |||
| 228 | /** | ||
| 229 | * Replaces the value in the <code>dataVector</code> instance | ||
| 230 | * variable with the values in the array <code>dataVector</code>. | ||
| 231 | * The first index in the <code>Object[][]</code> | ||
| 232 | * array is the row index and the second is the column index. | ||
| 233 | * <code>columnIdentifiers</code> are the names of the new columns. | ||
| 234 | * | ||
| 235 | * @param dataVector the new data vector | ||
| 236 | * @param columnIdentifiers the names of the columns | ||
| 237 | * @see #setDataVector(Vector, Vector) | ||
| 238 | */ | ||
| 239 | public void setDataVector(Object[][] dataVector, Object[] columnIdentifiers) { | ||
| 240 | setDataVector(convertToVector(dataVector), convertToVector(columnIdentifiers)); | ||
| 241 | } | ||
| 242 | |||
| 243 | /** | ||
| 244 | * Equivalent to <code>fireTableChanged</code>. | ||
| 245 | * | ||
| 246 | * @param event the change event | ||
| 247 | * | ||
| 248 | */ | ||
| 249 | public void newDataAvailable(TableModelEvent event) { | ||
| 250 | fireTableChanged(event); | ||
| 251 | } | ||
| 252 | |||
| 253 | // | ||
| 254 | // Manipulating rows | ||
| 255 | // | ||
| 256 | |||
| 257 | private void justifyRows(int from, int to) { | ||
| 258 | // Sometimes the DefaultTableModel is subclassed | ||
| 259 | // instead of the AbstractTableModel by mistake. | ||
| 260 | // Set the number of rows for the case when getRowCount | ||
| 261 | // is overridden. | ||
| 262 | dataVector.setSize(getRowCount()); | ||
| 263 | |||
| 264 | for (int i = from; i < to; i++) { | ||
| 265 | if (dataVector.elementAt(i) == null) { | ||
| 266 | dataVector.setElementAt(new Vector(), i); | ||
| 267 | } | ||
| 268 | ((Vector)dataVector.elementAt(i)).setSize(getColumnCount()); | ||
| 269 | } | ||
| 270 | } | ||
| 271 | |||
| 272 | /** | ||
| 273 | * Ensures that the new rows have the correct number of columns. | ||
| 274 | * This is accomplished by using the <code>setSize</code> method in | ||
| 275 | * <code>Vector</code> which truncates vectors | ||
| 276 | * which are too long, and appends <code>null</code>s if they | ||
| 277 | * are too short. | ||
| 278 | * This method also sends out a <code>tableChanged</code> | ||
| 279 | * notification message to all the listeners. | ||
| 280 | * | ||
| 281 | * @param e this <code>TableModelEvent</code> describes | ||
| 282 | * where the rows were added. | ||
| 283 | * If <code>null</code> it assumes | ||
| 284 | * all the rows were newly added | ||
| 285 | * @see #getDataVector | ||
| 286 | */ | ||
| 287 | public void newRowsAdded(TableModelEvent e) { | ||
| 288 | justifyRows(e.getFirstRow(), e.getLastRow() + 1); | ||
| 289 | fireTableChanged(e); | ||
| 290 | } | ||
| 291 | |||
| 292 | /** | ||
| 293 | * Equivalent to <code>fireTableChanged</code>. | ||
| 294 | * | ||
| 295 | * @param event the change event | ||
| 296 | * | ||
| 297 | */ | ||
| 298 | public void rowsRemoved(TableModelEvent event) { | ||
| 299 | fireTableChanged(event); | ||
| 300 | } | ||
| 301 | |||
| 302 | /** | ||
| 303 | * Obsolete as of Java 2 platform v1.3. Please use <code>setRowCount</code> instead. | ||
| 304 | */ | ||
| 305 | /* | ||
| 306 | * Sets the number of rows in the model. If the new size is greater | ||
| 307 | * than the current size, new rows are added to the end of the model | ||
| 308 | * If the new size is less than the current size, all | ||
| 309 | * rows at index <code>rowCount</code> and greater are discarded. <p> | ||
| 310 | * | ||
| 311 | * @param rowCount the new number of rows | ||
| 312 | * @see #setRowCount | ||
| 313 | */ | ||
| 314 | public void setNumRows(int rowCount) { | ||
| 315 | int old = getRowCount(); | ||
| 316 | if (old == rowCount) { | ||
| 317 | return; | ||
| 318 | } | ||
| 319 | dataVector.setSize(rowCount); | ||
| 320 | if (rowCount <= old) { | ||
| 321 | fireTableRowsDeleted(rowCount, old-1); | ||
| 322 | } | ||
| 323 | else { | ||
| 324 | justifyRows(old, rowCount); | ||
| 325 | fireTableRowsInserted(old, rowCount-1); | ||
| 326 | } | ||
| 327 | } | ||
| 328 | |||
| 329 | /** | ||
| 330 | * Sets the number of rows in the model. If the new size is greater | ||
| 331 | * than the current size, new rows are added to the end of the model | ||
| 332 | * If the new size is less than the current size, all | ||
| 333 | * rows at index <code>rowCount</code> and greater are discarded. <p> | ||
| 334 | * | ||
| 335 | * @see #setColumnCount | ||
| 336 | * @since 1.3 | ||
| 337 | */ | ||
| 338 | public void setRowCount(int rowCount) { | ||
| 339 | setNumRows(rowCount); | ||
| 340 | } | ||
| 341 | |||
| 342 | /** | ||
| 343 | * Adds a row to the end of the model. The new row will contain | ||
| 344 | * <code>null</code> values unless <code>rowData</code> is specified. | ||
| 345 | * Notification of the row being added will be generated. | ||
| 346 | * | ||
| 347 | * @param rowData optional data of the row being added | ||
| 348 | */ | ||
| 349 | public void addRow(Vector rowData) { | ||
| 350 | insertRow(getRowCount(), rowData); | ||
| 351 | } | ||
| 352 | |||
| 353 | /** | ||
| 354 | * Adds a row to the end of the model. The new row will contain | ||
| 355 | * <code>null</code> values unless <code>rowData</code> is specified. | ||
| 356 | * Notification of the row being added will be generated. | ||
| 357 | * | ||
| 358 | * @param rowData optional data of the row being added | ||
| 359 | */ | ||
| 360 | public void addRow(Object[] rowData) { | ||
| 361 | addRow(convertToVector(rowData)); | ||
| 362 | } | ||
| 363 | |||
| 364 | /** | ||
| 365 | * Inserts a row at <code>row</code> in the model. The new row | ||
| 366 | * will contain <code>null</code> values unless <code>rowData</code> | ||
| 367 | * is specified. Notification of the row being added will be generated. | ||
| 368 | * | ||
| 369 | * @param row the row index of the row to be inserted | ||
| 370 | * @param rowData optional data of the row being added | ||
| 371 | * @exception ArrayIndexOutOfBoundsException if the row was invalid | ||
| 372 | */ | ||
| 373 | public void insertRow(int row, Vector rowData) { | ||
| 374 | dataVector.insertElementAt(rowData, row); | ||
| 375 | justifyRows(row, row+1); | ||
| 376 | fireTableRowsInserted(row, row); | ||
| 377 | } | ||
| 378 | |||
| 379 | /** | ||
| 380 | * Inserts a row at <code>row</code> in the model. The new row | ||
| 381 | * will contain <code>null</code> values unless <code>rowData</code> | ||
| 382 | * is specified. Notification of the row being added will be generated. | ||
| 383 | * | ||
| 384 | * @param row the row index of the row to be inserted | ||
| 385 | * @param rowData optional data of the row being added | ||
| 386 | * @exception ArrayIndexOutOfBoundsException if the row was invalid | ||
| 387 | */ | ||
| 388 | public void insertRow(int row, Object[] rowData) { | ||
| 389 | insertRow(row, convertToVector(rowData)); | ||
| 390 | } | ||
| 391 | |||
| 392 | private static int gcd(int i, int j) { | ||
| 393 | return (j == 0) ? i : gcd(j, i%j); | ||
| 394 | } | ||
| 395 | |||
| 396 | private static void rotate(Vector v, int a, int b, int shift) { | ||
| 397 | int size = b - a; | ||
| 398 | int r = size - shift; | ||
| 399 | int g = gcd(size, r); | ||
| 400 | for(int i = 0; i < g; i++) { | ||
| 401 | int to = i; | ||
| 402 | Object tmp = v.elementAt(a + to); | ||
| 403 | for(int from = (to + r) % size; from != i; from = (to + r) % size) { | ||
| 404 | v.setElementAt(v.elementAt(a + from), a + to); | ||
| 405 | to = from; | ||
| 406 | } | ||
| 407 | v.setElementAt(tmp, a + to); | ||
| 408 | } | ||
| 409 | } | ||
| 410 | |||
| 411 | /** | ||
| 412 | * Moves one or more rows from the inclusive range <code>start</code> to | ||
| 413 | * <code>end</code> to the <code>to</code> position in the model. | ||
| 414 | * After the move, the row that was at index <code>start</code> | ||
| 415 | * will be at index <code>to</code>. | ||
| 416 | * This method will send a <code>tableChanged</code> notification | ||
| 417 | * message to all the listeners. <p> | ||
| 418 | * | ||
| 419 | * <pre> | ||
| 420 | * Examples of moves: | ||
| 421 | * <p> | ||
| 422 | * 1. moveRow(1,3,5); | ||
| 423 | * a|B|C|D|e|f|g|h|i|j|k - before | ||
| 424 | * a|e|f|g|h|B|C|D|i|j|k - after | ||
| 425 | * <p> | ||
| 426 | * 2. moveRow(6,7,1); | ||
| 427 | * a|b|c|d|e|f|G|H|i|j|k - before | ||
| 428 | * a|G|H|b|c|d|e|f|i|j|k - after | ||
| 429 | * <p> | ||
| 430 | * </pre> | ||
| 431 | * | ||
| 432 | * @param start the starting row index to be moved | ||
| 433 | * @param end the ending row index to be moved | ||
| 434 | * @param to the destination of the rows to be moved | ||
| 435 | * @exception ArrayIndexOutOfBoundsException if any of the elements | ||
| 436 | * would be moved out of the table's range | ||
| 437 | * | ||
| 438 | */ | ||
| 439 | public void moveRow(int start, int end, int to) { | ||
| 440 | int shift = to - start; | ||
| 441 | int first, last; | ||
| 442 | if (shift < 0) { | ||
| 443 | first = to; | ||
| 444 | last = end; | ||
| 445 | } | ||
| 446 | else { | ||
| 447 | first = start; | ||
| 448 | last = to + end - start; | ||
| 449 | } | ||
| 450 | rotate(dataVector, first, last + 1, shift); | ||
| 451 | |||
| 452 | fireTableRowsUpdated(first, last); | ||
| 453 | } | ||
| 454 | |||
| 455 | /** | ||
| 456 | * Removes the row at <code>row</code> from the model. Notification | ||
| 457 | * of the row being removed will be sent to all the listeners. | ||
| 458 | * | ||
| 459 | * @param row the row index of the row to be removed | ||
| 460 | * @exception ArrayIndexOutOfBoundsException if the row was invalid | ||
| 461 | */ | ||
| 462 | public void removeRow(int row) { | ||
| 463 | dataVector.removeElementAt(row); | ||
| 464 | fireTableRowsDeleted(row, row); | ||
| 465 | } | ||
| 466 | |||
| 467 | // | ||
| 468 | // Manipulating columns | ||
| 469 | // | ||
| 470 | |||
| 471 | /** | ||
| 472 | * Replaces the column identifiers in the model. If the number of | ||
| 473 | * <code>newIdentifier</code>s is greater than the current number | ||
| 474 | * of columns, new columns are added to the end of each row in the model. | ||
| 475 | * If the number of <code>newIdentifier</code>s is less than the current | ||
| 476 | * number of columns, all the extra columns at the end of a row are | ||
| 477 | * discarded. <p> | ||
| 478 | * | ||
| 479 | * @param columnIdentifiers vector of column identifiers. If | ||
| 480 | * <code>null</code>, set the model | ||
| 481 | * to zero columns | ||
| 482 | * @see #setNumRows | ||
| 483 | */ | ||
| 484 | public void setColumnIdentifiers(Vector columnIdentifiers) { | ||
| 485 | setDataVector(dataVector, columnIdentifiers); | ||
| 486 | } | ||
| 487 | |||
| 488 | /** | ||
| 489 | * Replaces the column identifiers in the model. If the number of | ||
| 490 | * <code>newIdentifier</code>s is greater than the current number | ||
| 491 | * of columns, new columns are added to the end of each row in the model. | ||
| 492 | * If the number of <code>newIdentifier</code>s is less than the current | ||
| 493 | * number of columns, all the extra columns at the end of a row are | ||
| 494 | * discarded. <p> | ||
| 495 | * | ||
| 496 | * @param newIdentifiers array of column identifiers. | ||
| 497 | * If <code>null</code>, set | ||
| 498 | * the model to zero columns | ||
| 499 | * @see #setNumRows | ||
| 500 | */ | ||
| 501 | public void setColumnIdentifiers(Object[] newIdentifiers) { | ||
| 502 | setColumnIdentifiers(convertToVector(newIdentifiers)); | ||
| 503 | } | ||
| 504 | |||
| 505 | /** | ||
| 506 | * Sets the number of columns in the model. If the new size is greater | ||
| 507 | * than the current size, new columns are added to the end of the model | ||
| 508 | * with <code>null</code> cell values. | ||
| 509 | * If the new size is less than the current size, all columns at index | ||
| 510 | * <code>columnCount</code> and greater are discarded. | ||
| 511 | * | ||
| 512 | * @param columnCount the new number of columns in the model | ||
| 513 | * | ||
| 514 | * @see #setColumnCount | ||
| 515 | * @since 1.3 | ||
| 516 | */ | ||
| 517 | public void setColumnCount(int columnCount) { | ||
| 518 | columnIdentifiers.setSize(columnCount); | ||
| 519 | justifyRows(0, getRowCount()); | ||
| 520 | fireTableStructureChanged(); | ||
| 521 | } | ||
| 522 | |||
| 523 | /** | ||
| 524 | * Adds a column to the model. The new column will have the | ||
| 525 | * identifier <code>columnName</code>, which may be null. This method | ||
| 526 | * will send a | ||
| 527 | * <code>tableChanged</code> notification message to all the listeners. | ||
| 528 | * This method is a cover for <code>addColumn(Object, Vector)</code> which | ||
| 529 | * uses <code>null</code> as the data vector. | ||
| 530 | * | ||
| 531 | * @param columnName the identifier of the column being added | ||
| 532 | */ | ||
| 533 | public void addColumn(Object columnName) { | ||
| 534 | addColumn(columnName, (Vector)null); | ||
| 535 | } | ||
| 536 | |||
| 537 | /** | ||
| 538 | * Adds a column to the model. The new column will have the | ||
| 539 | * identifier <code>columnName</code>, which may be null. | ||
| 540 | * <code>columnData</code> is the | ||
| 541 | * optional vector of data for the column. If it is <code>null</code> | ||
| 542 | * the column is filled with <code>null</code> values. Otherwise, | ||
| 543 | * the new data will be added to model starting with the first | ||
| 544 | * element going to row 0, etc. This method will send a | ||
| 545 | * <code>tableChanged</code> notification message to all the listeners. | ||
| 546 | * | ||
| 547 | * @param columnName the identifier of the column being added | ||
| 548 | * @param columnData optional data of the column being added | ||
| 549 | */ | ||
| 550 | public void addColumn(Object columnName, Vector columnData) { | ||
| 551 | columnIdentifiers.addElement(columnName); | ||
| 552 | if (columnData != null) { | ||
| 553 | int columnSize = columnData.size(); | ||
| 554 | if (columnSize > getRowCount()) { | ||
| 555 | dataVector.setSize(columnSize); | ||
| 556 | } | ||
| 557 | justifyRows(0, getRowCount()); | ||
| 558 | int newColumn = getColumnCount() - 1; | ||
| 559 | for(int i = 0; i < columnSize; i++) { | ||
| 560 | Vector row = (Vector)dataVector.elementAt(i); | ||
| 561 | row.setElementAt(columnData.elementAt(i), newColumn); | ||
| 562 | } | ||
| 563 | } | ||
| 564 | else { | ||
| 565 | justifyRows(0, getRowCount()); | ||
| 566 | } | ||
| 567 | |||
| 568 | fireTableStructureChanged(); | ||
| 569 | } | ||
| 570 | |||
| 571 | /** | ||
| 572 | * Adds a column to the model. The new column will have the | ||
| 573 | * identifier <code>columnName</code>. <code>columnData</code> is the | ||
| 574 | * optional array of data for the column. If it is <code>null</code> | ||
| 575 | * the column is filled with <code>null</code> values. Otherwise, | ||
| 576 | * the new data will be added to model starting with the first | ||
| 577 | * element going to row 0, etc. This method will send a | ||
| 578 | * <code>tableChanged</code> notification message to all the listeners. | ||
| 579 | * | ||
| 580 | * @see #addColumn(Object, Vector) | ||
| 581 | */ | ||
| 582 | public void addColumn(Object columnName, Object[] columnData) { | ||
| 583 | addColumn(columnName, convertToVector(columnData)); | ||
| 584 | } | ||
| 585 | |||
| 586 | // | ||
| 587 | // Implementing the TableModel interface | ||
| 588 | // | ||
| 589 | |||
| 590 | /** | ||
| 591 | * Returns the number of rows in this data table. | ||
| 592 | * @return the number of rows in the model | ||
| 593 | */ | ||
| 594 | public int getRowCount() { | ||
| 595 | return dataVector.size(); | ||
| 596 | } | ||
| 597 | |||
| 598 | /** | ||
| 599 | * Returns the number of columns in this data table. | ||
| 600 | * @return the number of columns in the model | ||
| 601 | */ | ||
| 602 | public int getColumnCount() { | ||
| 603 | return columnIdentifiers.size(); | ||
| 604 | } | ||
| 605 | |||
| 606 | /** | ||
| 607 | * Returns the column name. | ||
| 608 | * | ||
| 609 | * @return a name for this column using the string value of the | ||
| 610 | * appropriate member in <code>columnIdentifiers</code>. | ||
| 611 | * If <code>columnIdentifiers</code> does not have an entry | ||
| 612 | * for this index, returns the default | ||
| 613 | * name provided by the superclass. | ||
| 614 | */ | ||
| 615 | public String getColumnName(int column) { | ||
| 616 | Object id = null; | ||
| 617 | // This test is to cover the case when | ||
| 618 | // getColumnCount has been subclassed by mistake ... | ||
| 619 | if (column < columnIdentifiers.size() && (column >= 0)) { | ||
| 620 | id = columnIdentifiers.elementAt(column); | ||
| 621 | } | ||
| 622 | return (id == null) ? super.getColumnName(column) | ||
| 623 | : id.toString(); | ||
| 624 | } | ||
| 625 | |||
| 626 | /** | ||
| 627 | * Returns true regardless of parameter values. | ||
| 628 | * | ||
| 629 | * @param row the row whose value is to be queried | ||
| 630 | * @param column the column whose value is to be queried | ||
| 631 | * @return true | ||
| 632 | * @see #setValueAt | ||
| 633 | */ | ||
| 634 | public boolean isCellEditable(int row, int column) { | ||
| 635 | return true; | ||
| 636 | } | ||
| 637 | |||
| 638 | /** | ||
| 639 | * Returns an attribute value for the cell at <code>row</code> | ||
| 640 | * and <code>column</code>. | ||
| 641 | * | ||
| 642 | * @param row the row whose value is to be queried | ||
| 643 | * @param column the column whose value is to be queried | ||
| 644 | * @return the value Object at the specified cell | ||
| 645 | * @exception ArrayIndexOutOfBoundsException if an invalid row or | ||
| 646 | * column was given | ||
| 647 | */ | ||
| 648 | public Object getValueAt(int row, int column) { | ||
| 649 | Vector rowVector = (Vector)dataVector.elementAt(row); | ||
| 650 | return rowVector.elementAt(column); | ||
| 651 | } | ||
| 652 | |||
| 653 | /** | ||
| 654 | * Sets the object value for the cell at <code>column</code> and | ||
| 655 | * <code>row</code>. <code>aValue</code> is the new value. This method | ||
| 656 | * will generate a <code>tableChanged</code> notification. | ||
| 657 | * | ||
| 658 | * @param aValue the new value; this can be null | ||
| 659 | * @param row the row whose value is to be changed | ||
| 660 | * @param column the column whose value is to be changed | ||
| 661 | * @exception ArrayIndexOutOfBoundsException if an invalid row or | ||
| 662 | * column was given | ||
| 663 | */ | ||
| 664 | public void setValueAt(Object aValue, int row, int column) { | ||
| 665 | Vector rowVector = (Vector)dataVector.elementAt(row); | ||
| 666 | rowVector.setElementAt(aValue, column); | ||
| 667 | fireTableCellUpdated(row, column); | ||
| 668 | } | ||
| 669 | |||
| 670 | // | ||
| 671 | // Protected Methods | ||
| 672 | // | ||
| 673 | |||
| 674 | /** | ||
| 675 | * Returns a vector that contains the same objects as the array. | ||
| 676 | * @param anArray the array to be converted | ||
| 677 | * @return the new vector; if <code>anArray</code> is <code>null</code>, | ||
| 678 | * returns <code>null</code> | ||
| 679 | */ | ||
| 680 | protected static Vector convertToVector(Object[] anArray) { | ||
| 681 | if (anArray == null) { | ||
| 682 | return null; | ||
| 683 | } | ||
| 684 | Vector<Object> v = new Vector<Object>(anArray.length); | ||
| 685 | for (Object o : anArray) { | ||
| 686 | v.addElement(o); | ||
| 687 | } | ||
| 688 | return v; | ||
| 689 | } | ||
| 690 | |||
| 691 | /** | ||
| 692 | * Returns a vector of vectors that contains the same objects as the array. | ||
| 693 | * @param anArray the double array to be converted | ||
| 694 | * @return the new vector of vectors; if <code>anArray</code> is | ||
| 695 | * <code>null</code>, returns <code>null</code> | ||
| 696 | */ | ||
| 697 | protected static Vector convertToVector(Object[][] anArray) { | ||
| 698 | if (anArray == null) { | ||
| 699 | return null; | ||
| 700 | } | ||
| 701 | Vector<Vector> v = new Vector<Vector>(anArray.length); | ||
| 702 | for (Object[] o : anArray) { | ||
| 703 | v.addElement(convertToVector(o)); | ||
| 704 | } | ||
| 705 | return v; | ||
| 706 | } | ||
| 707 | |||
| 708 | } // End of class DefaultTableModel | ||