root / trunk / libraries / libUIComponent / src / org / gvsig / gui / beans / swing / jComboBoxItemsSeeker / BinarySearchUsingFirstCharacters.java @ 13136
History | View | Annotate | Download (15.5 KB)
| 1 |
package org.gvsig.gui.beans.swing.jComboBoxItemsSeeker; |
|---|---|
| 2 |
|
| 3 |
import java.util.ArrayList; |
| 4 |
import java.util.Arrays; |
| 5 |
import java.util.Comparator; |
| 6 |
import java.util.List; |
| 7 |
import java.util.Vector; |
| 8 |
|
| 9 |
|
| 10 |
/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
|
| 11 |
*
|
| 12 |
* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
|
| 13 |
*
|
| 14 |
* This program is free software; you can redistribute it and/or
|
| 15 |
* modify it under the terms of the GNU General Public License
|
| 16 |
* as published by the Free Software Foundation; either version 2
|
| 17 |
* of the License, or (at your option) any later version.
|
| 18 |
*
|
| 19 |
* This program is distributed in the hope that it will be useful,
|
| 20 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 21 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 22 |
* GNU General Public License for more details.
|
| 23 |
*
|
| 24 |
* You should have received a copy of the GNU General Public License
|
| 25 |
* along with this program; if not, write to the Free Software
|
| 26 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
|
| 27 |
*
|
| 28 |
* For more information, contact:
|
| 29 |
*
|
| 30 |
* Generalitat Valenciana
|
| 31 |
* Conselleria d'Infraestructures i Transport
|
| 32 |
* Av. Blasco Ib??ez, 50
|
| 33 |
* 46010 VALENCIA
|
| 34 |
* SPAIN
|
| 35 |
*
|
| 36 |
* +34 963862235
|
| 37 |
* gvsig@gva.es
|
| 38 |
* www.gvsig.gva.es
|
| 39 |
*
|
| 40 |
* or
|
| 41 |
*
|
| 42 |
* IVER T.I. S.A
|
| 43 |
* Salamanca 50
|
| 44 |
* 46005 Valencia
|
| 45 |
* Spain
|
| 46 |
*
|
| 47 |
* +34 963163400
|
| 48 |
* dac@iver.es
|
| 49 |
*/
|
| 50 |
|
| 51 |
/**
|
| 52 |
* This class has static methods that return items that their beginning text value matches with a text pattern. <br>
|
| 53 |
* It's necessary that items of the parameter array (Vector) were sort ordered according to their text value. <br>
|
| 54 |
* Supports Vectors with and without repeated items.
|
| 55 |
*
|
| 56 |
* There are four methods, that are a modification of a binary search algorithm of search, getting a rank of items:
|
| 57 |
* <ul>
|
| 58 |
* <li>Considering case sensitive in the search.</li>
|
| 59 |
* <li>Ignoring case sensitive in the search.</li>
|
| 60 |
* <li>Considering case sensitive in the search and an object which implements the Comparable interface</li>
|
| 61 |
* <li>Ignoring case sensitive in the search, but yes an objecth which implements the Comparable interface</li>
|
| 62 |
* </ul>
|
| 63 |
*
|
| 64 |
* This class is a copy of a class with the same name located in <i>libIverUtiles</i>
|
| 65 |
*
|
| 66 |
* @author Pablo Piqueras Bartolom? (p_queras@hotmail.com)
|
| 67 |
*/
|
| 68 |
public class BinarySearchUsingFirstCharacters { |
| 69 |
/**
|
| 70 |
* This method should be used when is wanted to distinguish small letters from capital letters during the search.
|
| 71 |
*
|
| 72 |
* It's necessary that all items of the array implement the {@link Comparable} interface.<br>
|
| 73 |
* And it's also necessary that the value returned by the <i>toString()</i> method of each item (supposing
|
| 74 |
* they inherit from Object) would be the expected value user saw (that would be used to compare the items).
|
| 75 |
*
|
| 76 |
* @param text java.lang.String
|
| 77 |
* @param sortOrderedItems java.util.Vector
|
| 78 |
*/
|
| 79 |
public synchronized static List doSearchConsideringCaseSensitive(String text, Vector sortOrderedItems) { |
| 80 |
int currentIteration = 0; |
| 81 |
int size = sortOrderedItems.size();
|
| 82 |
int maxNumberOfIterations = (int) MathExtensionReduced.log2(size); |
| 83 |
int lowIndex = 0; |
| 84 |
int highIndex = sortOrderedItems.size() - 1; |
| 85 |
int mIndx;
|
| 86 |
|
| 87 |
while ((lowIndex <= highIndex) && (currentIteration <= maxNumberOfIterations)) {
|
| 88 |
mIndx = ( lowIndex + highIndex ) / 2;
|
| 89 |
|
| 90 |
if ( sortOrderedItems.get( mIndx ).toString().startsWith( text ) ) {
|
| 91 |
lowIndex = highIndex = mIndx; |
| 92 |
highIndex ++; |
| 93 |
|
| 94 |
// Expand the rank to up
|
| 95 |
while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().startsWith( text ) ) ) {
|
| 96 |
highIndex ++; |
| 97 |
} |
| 98 |
|
| 99 |
// Expand the rank to down
|
| 100 |
while ( ( (lowIndex - 1) > -1 ) && ( sortOrderedItems.get( (lowIndex - 1) ).toString().startsWith( text ) ) ) { |
| 101 |
lowIndex --; |
| 102 |
} |
| 103 |
|
| 104 |
// It's possible that items with different case, should be between the same case, then this item will be added individually:
|
| 105 |
List list = new Vector(sortOrderedItems.subList(lowIndex, highIndex)); |
| 106 |
|
| 107 |
// Expand to down
|
| 108 |
lowIndex --; |
| 109 |
while ( ( lowIndex > -1 ) && ( sortOrderedItems.get( (lowIndex ) ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) { |
| 110 |
if (sortOrderedItems.get( lowIndex ).toString().startsWith( text )) {
|
| 111 |
list.add(0, sortOrderedItems.get( lowIndex ));
|
| 112 |
} |
| 113 |
|
| 114 |
lowIndex --; |
| 115 |
} |
| 116 |
|
| 117 |
// Expand to up
|
| 118 |
while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) {
|
| 119 |
if (sortOrderedItems.get( highIndex ).toString().startsWith( text )) {
|
| 120 |
list.add(list.size(), sortOrderedItems.get( highIndex )); |
| 121 |
} |
| 122 |
|
| 123 |
highIndex ++; |
| 124 |
} |
| 125 |
|
| 126 |
// Returns all items in the rank
|
| 127 |
return list; // Breaks the loop |
| 128 |
} |
| 129 |
else {
|
| 130 |
if ( sortOrderedItems.get( mIndx ).toString().compareTo( text ) > 0 ) { |
| 131 |
highIndex = mIndx - 1;
|
| 132 |
} |
| 133 |
else {
|
| 134 |
lowIndex = mIndx + 1;
|
| 135 |
} |
| 136 |
} |
| 137 |
|
| 138 |
currentIteration ++; |
| 139 |
} |
| 140 |
|
| 141 |
// If no item has been found -> return null
|
| 142 |
return null; |
| 143 |
} |
| 144 |
|
| 145 |
/**
|
| 146 |
* This method should be used when is wanted not to distinguish small letters from capital letters during the search.
|
| 147 |
*
|
| 148 |
* It's necessary that all items of the array implement the {@link Comparable} interface.<br>
|
| 149 |
* And it's also necessary that the value returned by the <i>toString()</i> method of each item (supposing
|
| 150 |
* they inherit from Object) would be the expected value user saw (that would be used to compare the items).
|
| 151 |
*
|
| 152 |
* In this particular situation, it's supposed that the vector is sort ordered according the default algorithm of Java; this has the problem that
|
| 153 |
* it doesn't consideres the special characters and the orthographic rules of languages that aren't English, and then, for a particular
|
| 154 |
* <i>text</i> search, an incorrect result could be obtained. The solution decided for this problem has been to modify the algorithm, for seach
|
| 155 |
* into two ranks.
|
| 156 |
*
|
| 157 |
* @param text java.lang.String
|
| 158 |
* @param sortOrderedItems java.util.Vector
|
| 159 |
*/
|
| 160 |
public synchronized static List doSearchIgnoringCaseSensitive(String text, Vector sortOrderedItems) { |
| 161 |
int currentIteration = 0; |
| 162 |
int size = sortOrderedItems.size();
|
| 163 |
int maxNumberOfIterations = (int) MathExtensionReduced.log2(size); |
| 164 |
int lowIndex = 0; |
| 165 |
int highIndex = sortOrderedItems.size() - 1; |
| 166 |
int mIndx;
|
| 167 |
List list = null; |
| 168 |
List list2 = null; |
| 169 |
|
| 170 |
// FIRST RANK
|
| 171 |
while ((lowIndex <= highIndex) && (currentIteration <= maxNumberOfIterations)) {
|
| 172 |
mIndx = ( lowIndex + highIndex ) / 2;
|
| 173 |
|
| 174 |
if ( sortOrderedItems.get( mIndx ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) {
|
| 175 |
lowIndex = highIndex = mIndx; |
| 176 |
highIndex ++; |
| 177 |
|
| 178 |
// Expand the rank to up
|
| 179 |
while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) {
|
| 180 |
highIndex ++; |
| 181 |
} |
| 182 |
|
| 183 |
// Expand the rank to down
|
| 184 |
while ( ( (lowIndex - 1) > -1 ) && ( sortOrderedItems.get( (lowIndex - 1) ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) { |
| 185 |
lowIndex --; |
| 186 |
} |
| 187 |
|
| 188 |
// Returns all items in the rank
|
| 189 |
list = Arrays.asList((sortOrderedItems.subList(lowIndex, highIndex)).toArray());
|
| 190 |
break;
|
| 191 |
} |
| 192 |
else {
|
| 193 |
if ( sortOrderedItems.get( mIndx ).toString().compareTo( text ) > 0 ) { |
| 194 |
highIndex = mIndx - 1;
|
| 195 |
} |
| 196 |
else {
|
| 197 |
lowIndex = mIndx + 1;
|
| 198 |
} |
| 199 |
} |
| 200 |
|
| 201 |
currentIteration ++; |
| 202 |
} |
| 203 |
|
| 204 |
// SECOND RANK
|
| 205 |
currentIteration = 0;
|
| 206 |
lowIndex = 0;
|
| 207 |
highIndex = sortOrderedItems.size() - 1;
|
| 208 |
|
| 209 |
while ((lowIndex <= highIndex) && (currentIteration <= maxNumberOfIterations)) {
|
| 210 |
mIndx = ( lowIndex + highIndex ) / 2;
|
| 211 |
|
| 212 |
if ( sortOrderedItems.get( mIndx ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) {
|
| 213 |
lowIndex = highIndex = mIndx; |
| 214 |
highIndex ++; |
| 215 |
|
| 216 |
// Expand the rank to up
|
| 217 |
while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) {
|
| 218 |
highIndex ++; |
| 219 |
} |
| 220 |
|
| 221 |
// Expand the rank to down
|
| 222 |
while ( ( (lowIndex - 1) > -1 ) && ( sortOrderedItems.get( (lowIndex - 1) ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) { |
| 223 |
lowIndex --; |
| 224 |
} |
| 225 |
|
| 226 |
// Returns all items in the rank
|
| 227 |
list2 = Arrays.asList((sortOrderedItems.subList(lowIndex, highIndex)).toArray()); // Breaks the loop |
| 228 |
|
| 229 |
if (list == null) |
| 230 |
return list2;
|
| 231 |
else {
|
| 232 |
if (list2 == null) |
| 233 |
return null; |
| 234 |
|
| 235 |
Object obj;
|
| 236 |
int j;
|
| 237 |
|
| 238 |
list = new ArrayList(list.subList(0, list.size())); |
| 239 |
|
| 240 |
for (int i = 0; i < list2.size(); i ++) { |
| 241 |
obj = list2.get(i); |
| 242 |
|
| 243 |
// Don't add items which are already in the list
|
| 244 |
if (!list.contains(obj)) {
|
| 245 |
// Adds in sort order the new item:
|
| 246 |
for (j = 0; j < list.size(); j ++) { |
| 247 |
if (list.get(j).toString().compareTo(obj.toString()) > 0) |
| 248 |
break;
|
| 249 |
} |
| 250 |
|
| 251 |
list.add(j, obj); |
| 252 |
} |
| 253 |
} |
| 254 |
|
| 255 |
// It's possible that some elements at the end wouldn't be found -> another small search
|
| 256 |
size = list.size(); |
| 257 |
if (size == 0) { |
| 258 |
j = 0;
|
| 259 |
} |
| 260 |
else {
|
| 261 |
j = sortOrderedItems.indexOf(list.get(size - 1));
|
| 262 |
} |
| 263 |
|
| 264 |
j++; |
| 265 |
|
| 266 |
if (j < sortOrderedItems.size()) {
|
| 267 |
do {
|
| 268 |
obj = sortOrderedItems.get( j ); |
| 269 |
|
| 270 |
if (obj.toString().toLowerCase().startsWith( text.toLowerCase())) {
|
| 271 |
list.add(size, obj); |
| 272 |
} |
| 273 |
|
| 274 |
j++; |
| 275 |
} |
| 276 |
while (j < sortOrderedItems.size());
|
| 277 |
} |
| 278 |
|
| 279 |
return list;
|
| 280 |
} |
| 281 |
} |
| 282 |
else {
|
| 283 |
if ( sortOrderedItems.get( mIndx ).toString().toLowerCase().compareTo( text.toLowerCase() ) > 0 ) { |
| 284 |
highIndex = mIndx - 1;
|
| 285 |
} |
| 286 |
else {
|
| 287 |
lowIndex = mIndx + 1;
|
| 288 |
} |
| 289 |
} |
| 290 |
|
| 291 |
currentIteration ++; |
| 292 |
} |
| 293 |
|
| 294 |
return null; |
| 295 |
} |
| 296 |
|
| 297 |
// /** THIS VERSION FAILURES IN SOME PARTICULAR SITUATIONS
|
| 298 |
// * This method should be used when is wanted distinguish small letters from capital letters during the search, and the comparation of items
|
| 299 |
// * done according an algorithm we define.
|
| 300 |
// *
|
| 301 |
// * And it's also necessary that the value returned by the <i>toString()</i> method of each item (supposing
|
| 302 |
// * they inherit from Object) would be the expected value user saw (that would be used to compare the items).
|
| 303 |
// *
|
| 304 |
// * @param text java.lang.String
|
| 305 |
// * @param sortOrderedItems java.util.Vector
|
| 306 |
// * @param comp An Comparator object which implements the <i><b>compareTo()</b><i> method.
|
| 307 |
// */
|
| 308 |
// public synchronized static List doSearchConsideringCaseSensitive(String text, Vector sortOrderedItems, Comparator comp) {
|
| 309 |
// int currentIteration = 0;
|
| 310 |
// int size = sortOrderedItems.size();
|
| 311 |
// int maxNumberOfIterations = (int) MathExtension.log2(size);
|
| 312 |
// int lowIndex = 0;
|
| 313 |
// int highIndex = sortOrderedItems.size() - 1;
|
| 314 |
// int mIndx;
|
| 315 |
//
|
| 316 |
//
|
| 317 |
// while ((lowIndex <= highIndex) && (currentIteration <= maxNumberOfIterations)) {
|
| 318 |
// mIndx = ( lowIndex + highIndex ) / 2;
|
| 319 |
//
|
| 320 |
// if ( sortOrderedItems.get( mIndx ).toString().startsWith( text ) ) {
|
| 321 |
// lowIndex = highIndex = mIndx;
|
| 322 |
// highIndex ++;
|
| 323 |
//
|
| 324 |
// // Expand the rank to up
|
| 325 |
// while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().startsWith( text ) ) ) {
|
| 326 |
// highIndex ++;
|
| 327 |
// }
|
| 328 |
//
|
| 329 |
// // Expand the rank to down
|
| 330 |
// while ( ( (lowIndex - 1) > -1 ) && ( sortOrderedItems.get( (lowIndex - 1) ).toString().startsWith( text ) ) ) {
|
| 331 |
// lowIndex --;
|
| 332 |
// }
|
| 333 |
//
|
| 334 |
// // It's possible that items with different case, should be between the same case, then this item will be added individually:
|
| 335 |
// List list = new Vector(sortOrderedItems.subList(lowIndex, highIndex));
|
| 336 |
//
|
| 337 |
//
|
| 338 |
// // Expand to down
|
| 339 |
// lowIndex --;
|
| 340 |
// while ( ( lowIndex > -1 ) && ( sortOrderedItems.get( (lowIndex ) ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) {
|
| 341 |
// if (sortOrderedItems.get( lowIndex ).toString().startsWith( text )) {
|
| 342 |
// list.add(0, sortOrderedItems.get( lowIndex ));
|
| 343 |
// }
|
| 344 |
//
|
| 345 |
// lowIndex --;
|
| 346 |
// }
|
| 347 |
//
|
| 348 |
// // Expand to up
|
| 349 |
// while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) {
|
| 350 |
// if (sortOrderedItems.get( highIndex ).toString().startsWith( text )) {
|
| 351 |
// list.add(list.size(), sortOrderedItems.get( highIndex ));
|
| 352 |
// }
|
| 353 |
//
|
| 354 |
// highIndex ++;
|
| 355 |
// }
|
| 356 |
//
|
| 357 |
// // Returns all items in the rank
|
| 358 |
// return list; // Breaks the loop
|
| 359 |
// }
|
| 360 |
// else {
|
| 361 |
// if ( comp.compare(sortOrderedItems.get( mIndx ), text ) > 0 ) {
|
| 362 |
// highIndex = mIndx - 1;
|
| 363 |
// }
|
| 364 |
// else {
|
| 365 |
// lowIndex = mIndx + 1;
|
| 366 |
// }
|
| 367 |
// }
|
| 368 |
//
|
| 369 |
// currentIteration ++;
|
| 370 |
// }
|
| 371 |
//
|
| 372 |
// // If no item has been found -> return null
|
| 373 |
// return null;
|
| 374 |
// }
|
| 375 |
|
| 376 |
/**
|
| 377 |
* This method should be used when is wanted distinguish small letters from capital letters during the search, and the comparation of items
|
| 378 |
* done according an algorithm we define.
|
| 379 |
*
|
| 380 |
* And it's also necessary that the value returned by the <i>toString()</i> method of each item (supposing
|
| 381 |
* they inherit from Object) would be the expected value user saw (that would be used to compare the items).
|
| 382 |
*
|
| 383 |
* @param text java.lang.String
|
| 384 |
* @param sortOrderedItems java.util.Vector
|
| 385 |
* @param comp An Comparator object which implements the <i><b>compareTo()</b><i> method.
|
| 386 |
*/
|
| 387 |
public synchronized static List doSearchConsideringCaseSensitive(String text, Vector sortOrderedItems, Comparator comp) { |
| 388 |
List results_list = doSearchIgnoringCaseSensitive(text, sortOrderedItems, comp);
|
| 389 |
|
| 390 |
if (results_list == null) |
| 391 |
return null; |
| 392 |
|
| 393 |
List results = new ArrayList(); |
| 394 |
|
| 395 |
for (int i = 0; i < (results_list.size()); i++) { |
| 396 |
if (results_list.get(i).toString().startsWith(text)) {
|
| 397 |
results.add(results_list.get(i)); |
| 398 |
} |
| 399 |
} |
| 400 |
|
| 401 |
return results;
|
| 402 |
} |
| 403 |
|
| 404 |
/**
|
| 405 |
* This method should be used when is wanted not to distinguish small letters from capital letters during the search, and the comparation of items
|
| 406 |
* done according an algorithm we define.
|
| 407 |
*
|
| 408 |
* And it's also necessary that the value returned by the <i>toString()</i> method of each item (supposing
|
| 409 |
* they inherit from Object) would be the expected value user saw (that would be used to compare the items).
|
| 410 |
*
|
| 411 |
* @param text java.lang.String
|
| 412 |
* @param sortOrderedItems java.util.Vector
|
| 413 |
* @param comp An Comparator object which implements the <i><b>compareTo()</b><i> method.
|
| 414 |
*/
|
| 415 |
public synchronized static List doSearchIgnoringCaseSensitive(String text, Vector sortOrderedItems, Comparator comp) { |
| 416 |
int currentIteration = 0; |
| 417 |
int size = sortOrderedItems.size();
|
| 418 |
int maxNumberOfIterations = (int) MathExtensionReduced.log2(size); |
| 419 |
int lowIndex = 0; |
| 420 |
int highIndex = sortOrderedItems.size() - 1; |
| 421 |
int mIndx;
|
| 422 |
|
| 423 |
while ((lowIndex <= highIndex) && (currentIteration <= maxNumberOfIterations)) {
|
| 424 |
mIndx = ( lowIndex + highIndex ) / 2;
|
| 425 |
|
| 426 |
if ( sortOrderedItems.get( mIndx ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) {
|
| 427 |
lowIndex = highIndex = mIndx; |
| 428 |
highIndex ++; |
| 429 |
|
| 430 |
// Expand the rank to up
|
| 431 |
while ( ( highIndex < size ) && ( sortOrderedItems.get( highIndex ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) {
|
| 432 |
highIndex ++; |
| 433 |
} |
| 434 |
|
| 435 |
// Expand the rank to down
|
| 436 |
while ( ( (lowIndex - 1) > -1 ) && ( sortOrderedItems.get( (lowIndex - 1) ).toString().toLowerCase().startsWith( text.toLowerCase() ) ) ) { |
| 437 |
lowIndex --; |
| 438 |
} |
| 439 |
|
| 440 |
// Returns all items in the rank
|
| 441 |
return Arrays.asList((sortOrderedItems.subList(lowIndex, highIndex)).toArray()); // Breaks the loop |
| 442 |
} |
| 443 |
else {
|
| 444 |
if ( comp.compare(sortOrderedItems.get( mIndx ).toString().toLowerCase(), text.toLowerCase() ) > 0 ) { |
| 445 |
highIndex = mIndx - 1;
|
| 446 |
} |
| 447 |
else {
|
| 448 |
lowIndex = mIndx + 1;
|
| 449 |
} |
| 450 |
} |
| 451 |
|
| 452 |
currentIteration ++; |
| 453 |
} |
| 454 |
|
| 455 |
return null; |
| 456 |
} |
| 457 |
} |