| 1 | package de.ugoe.cs.eventbench.jfc.data;
|
|---|
| 2 |
|
|---|
| 3 | import java.util.ArrayList;
|
|---|
| 4 | import java.util.HashMap;
|
|---|
| 5 | import java.util.HashSet;
|
|---|
| 6 | import java.util.LinkedHashSet;
|
|---|
| 7 | import java.util.List;
|
|---|
| 8 | import java.util.Map;
|
|---|
| 9 | import java.util.Set;
|
|---|
| 10 |
|
|---|
| 11 | import org.apache.commons.collections15.CollectionUtils;
|
|---|
| 12 |
|
|---|
| 13 | /**
|
|---|
| 14 | * <p>
|
|---|
| 15 | * This class implements a comparator for target string for JFC GUIs. It
|
|---|
| 16 | * internally maintains a collection of all targets that have been compared, to
|
|---|
| 17 | * ensure transitivity of the equals relation. This memory can always be deleted
|
|---|
| 18 | * by calling {@link #reset()}.
|
|---|
| 19 | * </p>
|
|---|
| 20 | *
|
|---|
| 21 | * @author Steffen Herbold
|
|---|
| 22 | * @version 1.0
|
|---|
| 23 | */
|
|---|
| 24 | public class JFCTargetComparator {
|
|---|
| 25 |
|
|---|
| 26 | private static boolean mutable = true;
|
|---|
| 27 |
|
|---|
| 28 | private static Set<String> knownTargets = new LinkedHashSet<String>();
|
|---|
| 29 |
|
|---|
| 30 | private static Map<String, Set<String>> equalTargets;
|
|---|
| 31 |
|
|---|
| 32 | public static void setMutable(boolean mutable) {
|
|---|
| 33 | if( JFCTargetComparator.mutable==true && mutable == false ) {
|
|---|
| 34 | equalTargets = new HashMap<String, Set<String>>();
|
|---|
| 35 | for( String target1 : knownTargets ) {
|
|---|
| 36 | Set<String> curEqualTargets = new HashSet<String>();
|
|---|
| 37 | for( String target2 : knownTargets ) {
|
|---|
| 38 | if( compare(target1, target2) ) {
|
|---|
| 39 | curEqualTargets.add(target2);
|
|---|
| 40 | }
|
|---|
| 41 | }
|
|---|
| 42 | equalTargets.put(target1, curEqualTargets);
|
|---|
| 43 | }
|
|---|
| 44 | }
|
|---|
| 45 | JFCTargetComparator.mutable = mutable;
|
|---|
| 46 | }
|
|---|
| 47 |
|
|---|
| 48 | /**
|
|---|
| 49 | * <p>
|
|---|
| 50 | * Compares to target strings. The strings are equal, if
|
|---|
| 51 | * <ul>
|
|---|
| 52 | * <li>the class, index, and text of all widgets are equal</li>
|
|---|
| 53 | * <li>either the title or the hashCode of all widgets are equal</li>
|
|---|
| 54 | * <li>either the title or the hashCode has been observed in one equal
|
|---|
| 55 | * instance of a widget, for all widgets.</li>
|
|---|
| 56 | * </ul>
|
|---|
| 57 | * </p>
|
|---|
| 58 | * <p>
|
|---|
| 59 | * All target strings are remembered internally, to be able to test for the
|
|---|
| 60 | * third property.
|
|---|
| 61 | * </p>
|
|---|
| 62 | *
|
|---|
| 63 | * @param target1
|
|---|
| 64 | * first target string
|
|---|
| 65 | * @param target2
|
|---|
| 66 | * second target string
|
|---|
| 67 | * @return true, if both targets are equal; false otherwise
|
|---|
| 68 | */
|
|---|
| 69 | public static boolean compare(String target1, String target2) {
|
|---|
| 70 | boolean result = false;
|
|---|
| 71 | if( mutable ) {
|
|---|
| 72 | instance.addTarget(target1);
|
|---|
| 73 | instance.addTarget(target2);
|
|---|
| 74 | knownTargets.add(target1);
|
|---|
| 75 | knownTargets.add(target2);
|
|---|
| 76 | JFCWidget widget1 = instance.find(target1);
|
|---|
| 77 | JFCWidget widget2 = instance.find(target2);
|
|---|
| 78 | result = (widget1==widget2);
|
|---|
| 79 | }
|
|---|
| 80 |
|
|---|
| 81 |
|
|---|
| 82 | if( !mutable ) {
|
|---|
| 83 | Set<String> curEquals = equalTargets.get(target1);
|
|---|
| 84 | if( curEquals!=null ) {
|
|---|
| 85 | result = curEquals.contains(target2);
|
|---|
| 86 | }
|
|---|
| 87 | }
|
|---|
| 88 |
|
|---|
| 89 | return result;
|
|---|
| 90 | }
|
|---|
| 91 |
|
|---|
| 92 | /**
|
|---|
| 93 | * <p>
|
|---|
| 94 | * Resets the internal memory of targets.
|
|---|
| 95 | * </p>
|
|---|
| 96 | */
|
|---|
| 97 | public static void reset() {
|
|---|
| 98 | instance = new JFCTargetComparator();
|
|---|
| 99 | }
|
|---|
| 100 |
|
|---|
| 101 | /**
|
|---|
| 102 | * <p>
|
|---|
| 103 | * Internal handle to the instance of this class (implemented as
|
|---|
| 104 | * Singleton!).
|
|---|
| 105 | * </p>
|
|---|
| 106 | */
|
|---|
| 107 | private static JFCTargetComparator instance = new JFCTargetComparator();
|
|---|
| 108 |
|
|---|
| 109 | /**
|
|---|
| 110 | * <p>
|
|---|
| 111 | * Private Constructor. Creates a new instance of the class and prevents
|
|---|
| 112 | * instantiation from outside of this class.
|
|---|
| 113 | * </p>
|
|---|
| 114 | */
|
|---|
| 115 | private JFCTargetComparator() {
|
|---|
| 116 | }
|
|---|
| 117 |
|
|---|
| 118 | /**
|
|---|
| 119 | * <p>
|
|---|
| 120 | * List of the root widgets found in the target string.
|
|---|
| 121 | * </p>
|
|---|
| 122 | */
|
|---|
| 123 | private List<JFCWidget> rootWidgets = new ArrayList<JFCTargetComparator.JFCWidget>();
|
|---|
| 124 |
|
|---|
| 125 | /**
|
|---|
| 126 | * <p>
|
|---|
| 127 | * Adds a target to the memory.
|
|---|
| 128 | * </p>
|
|---|
| 129 | *
|
|---|
| 130 | * @param target
|
|---|
| 131 | * target to be added
|
|---|
| 132 | */
|
|---|
| 133 | private void addTarget(String target) {
|
|---|
| 134 | if (target != null) {
|
|---|
| 135 | String[] targetParts = target.split("\\]\\.\\[");
|
|---|
| 136 | if (targetParts.length == 1) {
|
|---|
| 137 | addWidget(target.substring(1, target.length() - 1), null);
|
|---|
| 138 | } else {
|
|---|
| 139 | JFCWidget parent = null;
|
|---|
| 140 | for (int i = 0; i < targetParts.length; i++) {
|
|---|
| 141 | if (i == 0) {
|
|---|
| 142 | parent = addWidget(targetParts[i].substring(1), parent);
|
|---|
| 143 | } else if (i == targetParts.length - 1) {
|
|---|
| 144 | parent = addWidget(
|
|---|
| 145 | targetParts[i].substring(0,
|
|---|
| 146 | targetParts[i].length() - 1), parent);
|
|---|
| 147 | } else {
|
|---|
| 148 | parent = addWidget(targetParts[i], parent);
|
|---|
| 149 | }
|
|---|
| 150 | }
|
|---|
| 151 | }
|
|---|
| 152 | }
|
|---|
| 153 | }
|
|---|
| 154 |
|
|---|
| 155 | /**
|
|---|
| 156 | * <p>
|
|---|
| 157 | * Adds a widget extracted from a target to the memory. The widget is placed
|
|---|
| 158 | * as a child/parent of other widget according to the GUI hierarchy of the
|
|---|
| 159 | * application.
|
|---|
| 160 | * </p>
|
|---|
| 161 | * <p>
|
|---|
| 162 | * In case the widget already exists, the existing widget is returned and
|
|---|
| 163 | * the known targets and hashCodes of the existing widget are updated.
|
|---|
| 164 | * </p>
|
|---|
| 165 | *
|
|---|
| 166 | * @param widgetString
|
|---|
| 167 | * string identifying the widget
|
|---|
| 168 | * @param parent
|
|---|
| 169 | * parent widget; if null, it is a root widget and added to
|
|---|
| 170 | * {@link #rootWidgets}
|
|---|
| 171 | * @return the created widget.
|
|---|
| 172 | */
|
|---|
| 173 | private JFCWidget addWidget(String widgetString, JFCWidget parent) {
|
|---|
| 174 | String[] widgetInfo = widgetString.split("','");
|
|---|
| 175 | JFCWidget widget = generateWidget(widgetString);
|
|---|
| 176 |
|
|---|
| 177 | if (parent == null) {
|
|---|
| 178 | int index = rootWidgets.indexOf(widget);
|
|---|
| 179 | if (index >= 0) {
|
|---|
| 180 | widget = rootWidgets.get(index);
|
|---|
| 181 | widget.titles.add(widgetInfo[0]);
|
|---|
| 182 | widget.hashCodes.add(widgetInfo[4]);
|
|---|
| 183 | } else {
|
|---|
| 184 | rootWidgets.add(widget);
|
|---|
| 185 | }
|
|---|
| 186 | } else {
|
|---|
| 187 | int index = parent.children.indexOf(widget);
|
|---|
| 188 | if (index >= 0) {
|
|---|
| 189 | widget = parent.children.get(index);
|
|---|
| 190 | widget.titles.add(widgetInfo[0]);
|
|---|
| 191 | widget.hashCodes.add(widgetInfo[4]);
|
|---|
| 192 | } else {
|
|---|
| 193 | parent.children.add(widget);
|
|---|
| 194 | }
|
|---|
| 195 | }
|
|---|
| 196 |
|
|---|
| 197 | return widget;
|
|---|
| 198 | }
|
|---|
| 199 |
|
|---|
| 200 | /**
|
|---|
| 201 | * <p>
|
|---|
| 202 | * Creates a new {@link JFCWidget} from a widget string.
|
|---|
| 203 | * </p>
|
|---|
| 204 | *
|
|---|
| 205 | * @param widgetString
|
|---|
| 206 | * string describing the widget
|
|---|
| 207 | * @return created {@link JFCWidget}
|
|---|
| 208 | */
|
|---|
| 209 | private JFCWidget generateWidget(String widgetString) {
|
|---|
| 210 | String[] widgetInfo = widgetString.split("','");
|
|---|
| 211 | JFCWidget widget = new JFCWidget();
|
|---|
| 212 | if (widgetInfo[0].startsWith("'Pos(")) {
|
|---|
| 213 | widget.titles.add("Pos");
|
|---|
| 214 | } else {
|
|---|
| 215 | widget.titles.add(widgetInfo[0]);
|
|---|
| 216 | }
|
|---|
| 217 | widget.widgetClass = widgetInfo[1];
|
|---|
| 218 | widget.text = widgetInfo[2];
|
|---|
| 219 | widget.index = widgetInfo[3];
|
|---|
| 220 | widget.hashCodes.add(widgetInfo[4]);
|
|---|
| 221 | return widget;
|
|---|
| 222 | }
|
|---|
| 223 |
|
|---|
| 224 | /**
|
|---|
| 225 | * <p>
|
|---|
| 226 | * Tries to find the {@link JFCWidget} that the target string identifies in
|
|---|
| 227 | * the known GUI hierarchy, by traversing the known widgets starting with
|
|---|
| 228 | * the {@link #rootWidgets}.
|
|---|
| 229 | *
|
|---|
| 230 | * @param target
|
|---|
| 231 | * target string whose widget is searched for
|
|---|
| 232 | * @return respective {@link JFCWidget} instance if it is found; null
|
|---|
| 233 | * otherwise
|
|---|
| 234 | */
|
|---|
| 235 | private JFCWidget find(String target) {
|
|---|
| 236 | JFCWidget widget = null;
|
|---|
| 237 | if (target != null) {
|
|---|
| 238 | String[] targetParts = target.split("\\]\\.\\[");
|
|---|
| 239 | if (targetParts.length == 1) {
|
|---|
| 240 | JFCWidget generatedWidget = generateWidget(target.substring(1,
|
|---|
| 241 | target.length() - 1));
|
|---|
| 242 | int index = rootWidgets.indexOf(generatedWidget);
|
|---|
| 243 | if (index >= 0) {
|
|---|
| 244 | widget = rootWidgets.get(index);
|
|---|
| 245 | } else {
|
|---|
| 246 | return null;
|
|---|
| 247 | }
|
|---|
| 248 | } else {
|
|---|
| 249 | JFCWidget parent = null;
|
|---|
| 250 | for (int i = 0; i < targetParts.length; i++) {
|
|---|
| 251 | if (i == 0) {
|
|---|
| 252 | JFCWidget generatedWidget = generateWidget(targetParts[i]
|
|---|
| 253 | .substring(1));
|
|---|
| 254 | int index = rootWidgets.indexOf(generatedWidget);
|
|---|
| 255 | if (index >= 0) {
|
|---|
| 256 | parent = rootWidgets.get(index);
|
|---|
| 257 | } else {
|
|---|
| 258 | return null;
|
|---|
| 259 | }
|
|---|
| 260 | } else if (i == targetParts.length - 1) {
|
|---|
| 261 | JFCWidget generatedWidget = generateWidget(targetParts[i]
|
|---|
| 262 | .substring(0, targetParts[i].length() - 1));
|
|---|
| 263 | int index = parent.children.indexOf(generatedWidget);
|
|---|
| 264 | if (index >= 0) {
|
|---|
| 265 | widget = parent.children.get(index);
|
|---|
| 266 | } else {
|
|---|
| 267 | return null;
|
|---|
| 268 | }
|
|---|
| 269 | } else {
|
|---|
| 270 | JFCWidget generatedWidget = generateWidget(targetParts[i]);
|
|---|
| 271 | int index = parent.children.indexOf(generatedWidget);
|
|---|
| 272 | if (index >= 0) {
|
|---|
| 273 | parent = parent.children.get(index);
|
|---|
| 274 | } else {
|
|---|
| 275 | return null;
|
|---|
| 276 | }
|
|---|
| 277 | }
|
|---|
| 278 | }
|
|---|
| 279 | }
|
|---|
| 280 | }
|
|---|
| 281 | return widget;
|
|---|
| 282 | }
|
|---|
| 283 |
|
|---|
| 284 | /**
|
|---|
| 285 | * <p>
|
|---|
| 286 | * Internal class used to store JFCWidgets. The implementation is more like
|
|---|
| 287 | * a C-style structure, than a actual class.
|
|---|
| 288 | * </p>
|
|---|
| 289 | *
|
|---|
| 290 | * @author Steffen Herbold
|
|---|
| 291 | * @version 1.0
|
|---|
| 292 | */
|
|---|
| 293 | private static class JFCWidget {
|
|---|
| 294 |
|
|---|
| 295 | /**
|
|---|
| 296 | * <p>
|
|---|
| 297 | * Set of all known title strings of the widget.
|
|---|
| 298 | * </p>
|
|---|
| 299 | */
|
|---|
| 300 | Set<String> titles = new LinkedHashSet<String>();
|
|---|
| 301 |
|
|---|
| 302 | /**
|
|---|
| 303 | * <p>
|
|---|
| 304 | * Set of all known hashCodes of the widget.
|
|---|
| 305 | * </p>
|
|---|
| 306 | */
|
|---|
| 307 | Set<String> hashCodes = new LinkedHashSet<String>();
|
|---|
| 308 |
|
|---|
| 309 | /**
|
|---|
| 310 | * <p>
|
|---|
| 311 | * Class of the widget.
|
|---|
| 312 | * </p>
|
|---|
| 313 | */
|
|---|
| 314 | String widgetClass;
|
|---|
| 315 |
|
|---|
| 316 | /**
|
|---|
| 317 | * <p>
|
|---|
| 318 | * Index of the widget.
|
|---|
| 319 | * </p>
|
|---|
| 320 | */
|
|---|
| 321 | String index;
|
|---|
| 322 |
|
|---|
| 323 | /**
|
|---|
| 324 | * <p>
|
|---|
| 325 | * Text of the widget.
|
|---|
| 326 | * </p>
|
|---|
| 327 | */
|
|---|
| 328 | String text;
|
|---|
| 329 |
|
|---|
| 330 | int hashCode=0;
|
|---|
| 331 |
|
|---|
| 332 | /**
|
|---|
| 333 | * <p>
|
|---|
| 334 | * List of children of the widget.
|
|---|
| 335 | * </p>
|
|---|
| 336 | */
|
|---|
| 337 | List<JFCWidget> children = new ArrayList<JFCTargetComparator.JFCWidget>();
|
|---|
| 338 |
|
|---|
| 339 | /**
|
|---|
| 340 | * <p>
|
|---|
| 341 | * Two widgets are equal, if {@link #widgetClass}, {@link #index}, and
|
|---|
| 342 | * {@link #text} are equal and the intersection of either the
|
|---|
| 343 | * {@link #hashCodes}, the {@link #titles}, or both of them is not
|
|---|
| 344 | * empty.
|
|---|
| 345 | * </p>
|
|---|
| 346 | *
|
|---|
| 347 | * @see java.lang.Object#equals(java.lang.Object)
|
|---|
| 348 | */
|
|---|
| 349 | @Override
|
|---|
| 350 | public boolean equals(Object obj) {
|
|---|
| 351 | if (obj instanceof JFCWidget) {
|
|---|
| 352 | JFCWidget other = (JFCWidget) obj;
|
|---|
| 353 | boolean titleEqual = CollectionUtils.containsAny(titles, other.titles);
|
|---|
| 354 | boolean hashEqual = CollectionUtils.containsAny(hashCodes, other.hashCodes);
|
|---|
| 355 |
|
|---|
| 356 | boolean retVal;
|
|---|
| 357 |
|
|---|
| 358 | if (widgetClass.equals("Class")) {
|
|---|
| 359 | retVal = (widgetClass.equals(other.widgetClass)
|
|---|
| 360 | && text.equals(other.text) && (titleEqual || hashEqual));
|
|---|
| 361 | } else {
|
|---|
| 362 | retVal = (widgetClass.equals(other.widgetClass)
|
|---|
| 363 | && index.equals(other.index)
|
|---|
| 364 | && text.equals(other.text) && (titleEqual || hashEqual));
|
|---|
| 365 | }
|
|---|
| 366 | return retVal;
|
|---|
| 367 | }
|
|---|
| 368 | return false;
|
|---|
| 369 | }
|
|---|
| 370 |
|
|---|
| 371 | /*
|
|---|
| 372 | * (non-Javadoc)
|
|---|
| 373 | *
|
|---|
| 374 | * @see java.lang.Object#hashCode()
|
|---|
| 375 | */
|
|---|
| 376 | @Override
|
|---|
| 377 | public int hashCode() {
|
|---|
| 378 | if( hashCode==0 ) {
|
|---|
| 379 | int multiplier = 7;
|
|---|
| 380 | hashCode = multiplier * hashCode + widgetClass.hashCode();
|
|---|
| 381 | if (!widgetClass.equals("Class")) {
|
|---|
| 382 | hashCode = multiplier * hashCode + index.hashCode();
|
|---|
| 383 | }
|
|---|
| 384 | hashCode = multiplier * hashCode + text.hashCode();
|
|---|
| 385 | }
|
|---|
| 386 | return hashCode;
|
|---|
| 387 | }
|
|---|
| 388 | }
|
|---|
| 389 | }
|
|---|
