Mercurial > hg > digilib-old
annotate servlet/src/digilib/io/DocuDirectory.java @ 545:88ec23c2b2fb digilibPDF
fixed problem after removing old settings
| author | casties |
|---|---|
| date | Fri, 15 Oct 2010 10:42:57 +0200 |
| parents | e758a49258e8 |
| children | 686086d6e6d6 |
| rev | line source |
|---|---|
| 86 | 1 /* DocuDirectory -- Directory of DocuFilesets. |
| 2 | |
| 270 | 3 Digital Image Library servlet components |
| 86 | 4 |
| 270 | 5 Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de) |
| 86 | 6 |
| 270 | 7 This program is free software; you can redistribute it and/or modify it |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Please read license.txt for the full details. A copy of the GPL | |
| 13 may be found at http://www.gnu.org/copyleft/lgpl.html | |
| 86 | 14 |
| 270 | 15 You should have received a copy of the GNU General Public License |
| 16 along with this program; if not, write to the Free Software | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 86 | 18 |
| 19 * Created on 25.02.2003 | |
| 20 */ | |
| 21 | |
| 22 package digilib.io; | |
| 23 | |
| 24 import java.io.File; | |
| 130 | 25 import java.io.IOException; |
| 91 | 26 import java.util.ArrayList; |
| 270 | 27 import java.util.Collections; |
| 159 | 28 import java.util.List; |
| 259 | 29 import java.util.Map; |
| 86 | 30 |
| 130 | 31 import org.xml.sax.SAXException; |
| 32 | |
| 86 | 33 /** |
| 34 * @author casties | |
| 35 */ | |
| 149 | 36 public class DocuDirectory extends Directory { |
| 86 | 37 |
| 270 | 38 /** list of files (DocuDirent) */ |
| 531 | 39 private List<List<DocuDirent>> list = null; |
| 270 | 40 |
| 41 /** directory object is valid (exists on disk) */ | |
| 86 | 42 private boolean isValid = false; |
| 270 | 43 |
| 44 /** reference of the parent DocuDirCache */ | |
| 151 | 45 private DocuDirCache cache = null; |
| 270 | 46 |
| 47 /** directory name (digilib canonical form) */ | |
| 86 | 48 private String dirName = null; |
| 270 | 49 |
| 50 /** directory metadata */ | |
| 531 | 51 private MetadataMap dirMeta = null; |
| 270 | 52 |
| 53 /** state of metadata is valid */ | |
| 233 | 54 private boolean metaChecked = false; |
| 270 | 55 |
| 56 /** unresolved file metadata */ | |
| 531 | 57 private Map<String, MetadataMap> unresolvedFileMeta = null; |
| 270 | 58 |
| 59 /** time of last access of this object (not the filesystem) */ | |
| 86 | 60 private long objectATime = 0; |
| 270 | 61 |
| 62 /** time directory was last modified on the file system */ | |
| 86 | 63 private long dirMTime = 0; |
| 64 | |
| 270 | 65 /** |
| 66 * Constructor with digilib directory path and a parent DocuDirCache. | |
| 86 | 67 * |
| 270 | 68 * Directory names at the given path are appended to the base directories |
| 69 * from the cache. The directory is checked on disk and isValid is set. | |
| 86 | 70 * |
| 71 * @see readDir | |
| 270 | 72 * |
| 73 * @param path | |
| 74 * digilib directory path name | |
| 75 * @param cache | |
| 76 * parent DocuDirCache | |
| 86 | 77 */ |
| 151 | 78 public DocuDirectory(String path, DocuDirCache cache) { |
| 79 this.dirName = path; | |
| 80 this.cache = cache; | |
| 159 | 81 initDir(); |
| 82 checkDir(); | |
| 86 | 83 } |
| 84 | |
| 270 | 85 /** |
| 86 * Sets and checks the dir object. | |
| 87 * | |
| 91 | 88 */ |
| 159 | 89 protected void initDir() { |
| 90 String baseDirName = cache.getBaseDirNames()[0]; | |
| 91 // clear directory first | |
| 531 | 92 //list = new ArrayList[FileOps.NUM_CLASSES]; |
| 93 | |
| 94 list = new ArrayList<List<DocuDirent>>(FileOps.NUM_CLASSES); | |
| 95 // create empty list | |
| 96 for (int i=0; i < FileOps.NUM_CLASSES; ++i) { | |
| 97 list.add(null); | |
| 98 } | |
| 159 | 99 isValid = false; |
| 100 dirMTime = 0; | |
| 101 // the first directory has to exist | |
| 102 dir = new File(baseDirName, dirName); | |
| 103 } | |
| 156 | 104 |
| 270 | 105 /** |
| 106 * number of DocuFiles in this directory. | |
| 107 * | |
| 151 | 108 */ |
| 270 | 109 public int size() { |
| 531 | 110 return ((list != null) && (list.get(0) != null)) ? list.get(0).size() : 0; |
| 151 | 111 } |
| 91 | 112 |
| 270 | 113 /** |
| 114 * number of files of this class in this directory. | |
| 151 | 115 * |
| 270 | 116 * @param fc |
| 117 * fileClass | |
| 151 | 118 */ |
| 270 | 119 public int size(int fc) { |
| 531 | 120 return ((list != null) && (list.get(fc) != null)) ? list.get(fc).size() : 0; |
| 91 | 121 } |
| 122 | |
| 270 | 123 /** |
| 124 * Returns the ImageFile at the index. | |
| 151 | 125 * |
| 126 * @param index | |
| 127 * @return | |
| 128 */ | |
| 159 | 129 public ImageFileset get(int index) { |
| 531 | 130 if ((list == null) || (list.get(0) == null) || (index >= list.get(0).size())) { |
| 122 | 131 return null; |
| 151 | 132 } |
| 531 | 133 return (ImageFileset) list.get(0).get(index); |
| 159 | 134 } |
| 135 | |
| 270 | 136 /** |
| 137 * Returns the file of the class at the index. | |
| 159 | 138 * |
| 139 * @param index | |
| 270 | 140 * @param fc |
| 141 * fileClass | |
| 159 | 142 * @return |
| 143 */ | |
| 144 public DocuDirent get(int index, int fc) { | |
| 531 | 145 if ((list == null) || (list.get(fc) == null) || (index >= list.get(fc).size())) { |
| 159 | 146 return null; |
| 147 } | |
| 531 | 148 return (DocuDirent) list.get(fc).get(index); |
| 159 | 149 } |
| 150 | |
| 270 | 151 /** |
| 152 * Checks if the directory exists on the filesystem. | |
| 159 | 153 * |
| 154 * Sets isValid. | |
| 155 * | |
| 156 * @return | |
| 157 */ | |
| 158 public boolean checkDir() { | |
| 159 if (dir == null) { | |
| 160 initDir(); | |
| 161 } | |
| 162 isValid = dir.isDirectory(); | |
| 163 return isValid; | |
| 91 | 164 } |
| 165 | |
| 270 | 166 /** |
| 167 * Read the filesystem directory and fill this object. | |
| 86 | 168 * |
| 130 | 169 * Clears the List and (re)reads all files. |
| 86 | 170 * |
| 171 * @return boolean the directory exists | |
| 172 */ | |
| 282 | 173 public synchronized boolean readDir() { |
| 159 | 174 // check directory first |
| 175 checkDir(); | |
| 176 if (!isValid) { | |
| 177 return false; | |
| 178 } | |
| 270 | 179 // first file extension to try for scaled directories |
| 180 String scalext = null; | |
| 259 | 181 // read all filenames |
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182 logger.debug("reading directory " + dir.getPath()); |
| 259 | 183 /* |
| 270 | 184 * using ReadableFileFilter is safer (we won't get directories with file |
| 185 * extensions) but slower. | |
| 259 | 186 */ |
| 187 File[] allFiles = null; | |
| 545 | 188 // allFiles = dir.listFiles(new FileOps.ReadableFileFilter()); |
| 189 allFiles = dir.listFiles(); | |
|
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190 //logger.debug(" done"); |
| 259 | 191 if (allFiles == null) { |
| 192 // not a directory | |
| 193 return false; | |
| 194 } | |
| 270 | 195 // list of base dirs from the parent cache |
| 196 String[] baseDirNames = cache.getBaseDirNames(); | |
| 197 // number of base dirs | |
| 198 int nb = baseDirNames.length; | |
| 199 // array of base dirs | |
| 200 Directory[] dirs = new Directory[nb]; | |
| 201 // first entry is this directory | |
| 202 dirs[0] = this; | |
| 203 // fill array with the remaining directories | |
| 204 for (int j = 1; j < nb; j++) { | |
| 205 File d = new File(baseDirNames[j], dirName); | |
| 206 if (d.isDirectory()) { | |
| 207 dirs[j] = new Directory(d); | |
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208 logger.debug(" reading scaled directory " + d.getPath()); |
| 270 | 209 dirs[j].readDir(); |
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210 //logger.debug(" done"); |
| 270 | 211 } |
| 212 } | |
| 213 | |
| 159 | 214 // go through all file classes |
| 270 | 215 for (int classIdx = 0; classIdx < FileOps.NUM_CLASSES; classIdx++) { |
| 216 int fileClass = cache.getFileClasses()[classIdx]; | |
| 217 //logger.debug("filtering directory "+dir.getPath()+" for class | |
| 218 // "+fc); | |
| 219 File[] fileList = FileOps.listFiles(allFiles, FileOps | |
| 220 .filterForClass(fileClass)); | |
| 221 //logger.debug(" done"); | |
| 159 | 222 // number of files in the directory |
| 270 | 223 int numFiles = fileList.length; |
| 224 if (numFiles > 0) { | |
| 91 | 225 // create new list |
| 531 | 226 list.set(fileClass, new ArrayList<DocuDirent>(numFiles)); |
| 86 | 227 // sort the file names alphabetically and iterate the list |
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228 // Arrays.sort(fileList); // not needed <hertzhaft> |
| 531 | 229 Map<Integer, Object> hints = FileOps.newHints(FileOps.HINT_BASEDIRS, dirs); |
| 259 | 230 hints.put(FileOps.HINT_FILEEXT, scalext); |
| 270 | 231 for (int i = 0; i < numFiles; i++) { |
| 232 DocuDirent f = FileOps.fileForClass(fileClass, fileList[i], | |
| 233 hints); | |
| 159 | 234 // add the file to our list |
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235 // logger.debug(f.getName()); |
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236 |
| 531 | 237 list.get(fileClass).add(f); |
| 159 | 238 f.setParent(this); |
| 86 | 239 } |
| 531 | 240 // we sort the inner ArrayList (the list of files not the list of file types) |
| 241 // for binarySearch to work (DocuDirent's natural sort order is by filename) | |
| 242 Collections.sort(list.get(fileClass)); | |
| 86 | 243 } |
| 244 } | |
| 270 | 245 // clear the scaled directories |
| 246 for (int j = 1; j < nb; j++) { | |
| 247 if (dirs[j] != null) { | |
| 248 dirs[j].clearFilenames(); | |
| 249 } | |
| 250 } | |
| 251 // update number of cached files if this was the first time | |
| 252 if (dirMTime == 0) { | |
| 253 cache.numFiles += size(); | |
| 254 } | |
| 159 | 255 dirMTime = dir.lastModified(); |
| 256 // read metadata as well | |
| 257 readMeta(); | |
| 86 | 258 return isValid; |
| 259 } | |
| 260 | |
| 270 | 261 /** |
| 262 * Check to see if the directory has been modified and reread if necessary. | |
| 86 | 263 * |
| 264 * @return boolean the directory is valid | |
| 265 */ | |
| 266 public boolean refresh() { | |
| 267 if (isValid) { | |
| 268 if (dir.lastModified() > dirMTime) { | |
| 269 // on-disk modification time is more recent | |
| 270 readDir(); | |
| 271 } | |
| 272 touch(); | |
| 273 } | |
| 274 return isValid; | |
| 275 } | |
| 276 | |
| 270 | 277 /** |
| 278 * Read directory metadata. | |
| 279 * | |
| 86 | 280 */ |
| 281 public void readMeta() { | |
| 282 // check for directory metadata... | |
| 130 | 283 File mf = new File(dir, "index.meta"); |
| 284 if (mf.canRead()) { | |
| 285 XMLMetaLoader ml = new XMLMetaLoader(); | |
| 286 try { | |
| 287 // read directory meta file | |
| 531 | 288 Map<String, MetadataMap> fileMeta = ml.loadURL(mf.getAbsolutePath()); |
| 130 | 289 if (fileMeta == null) { |
| 290 return; | |
| 291 } | |
| 292 // meta for the directory itself is in the "" bin | |
| 531 | 293 dirMeta = fileMeta.remove(""); |
| 151 | 294 // read meta for files in this directory |
| 295 readFileMeta(fileMeta, null); | |
| 296 // is there meta for other files left? | |
| 130 | 297 if (fileMeta.size() > 0) { |
| 151 | 298 unresolvedFileMeta = fileMeta; |
| 130 | 299 } |
| 300 } catch (SAXException e) { | |
| 282 | 301 logger.warn("error parsing index.meta", e); |
| 130 | 302 } catch (IOException e) { |
| 282 | 303 logger.warn("error reading index.meta", e); |
| 130 | 304 } |
| 151 | 305 } |
| 306 readParentMeta(); | |
| 233 | 307 metaChecked = true; |
| 151 | 308 } |
| 130 | 309 |
| 270 | 310 /** |
| 311 * Read metadata from all known parent directories. | |
| 312 * | |
| 151 | 313 */ |
| 314 public void readParentMeta() { | |
| 315 // check the parent directories for additional file meta | |
| 316 Directory dd = parent; | |
| 156 | 317 String path = dir.getName(); |
| 151 | 318 while (dd != null) { |
| 156 | 319 if (((DocuDirectory) dd).hasUnresolvedFileMeta()) { |
| 320 readFileMeta(((DocuDirectory) dd).unresolvedFileMeta, path); | |
| 151 | 321 } |
| 322 // prepend parent dir path | |
| 323 path = dd.dir.getName() + "/" + path; | |
| 324 // become next parent | |
| 325 dd = dd.parent; | |
| 326 } | |
| 327 } | |
| 328 | |
| 270 | 329 /** |
| 330 * Read metadata for the files in this directory. | |
| 151 | 331 * |
| 270 | 332 * Takes a Map with meta-information, adding the relative path before the |
| 333 * lookup. | |
| 151 | 334 * |
| 335 * @param fileMeta | |
| 336 * @param relPath | |
| 270 | 337 * @param fc |
| 338 * fileClass | |
| 151 | 339 */ |
| 531 | 340 protected void readFileMeta(Map<String,MetadataMap> fileMeta, String relPath) { |
| 151 | 341 if (list == null) { |
| 342 // there are no files | |
| 343 return; | |
| 344 } | |
| 345 String path = (relPath != null) ? (relPath + "/") : ""; | |
| 159 | 346 // go through all file classes |
| 531 | 347 for (int nc = 0; nc < list.size(); nc++) { |
| 159 | 348 int fc = cache.getFileClasses()[nc]; |
| 531 | 349 if (list.get(fc) == null) { |
| 159 | 350 continue; |
| 351 } | |
| 352 // iterate through the list of files in this directory | |
| 531 | 353 for (DocuDirent f: list.get(fc)) { |
| 159 | 354 // prepend path to the filename |
| 355 String fn = path + f.getName(); | |
| 356 // look up meta for this file and remove from dir | |
| 531 | 357 MetadataMap meta = fileMeta.remove(fn); |
| 159 | 358 if (meta != null) { |
| 359 // store meta in file | |
| 360 f.setFileMeta(meta); | |
| 361 } | |
| 362 } | |
| 363 } | |
| 364 } | |
| 365 | |
| 531 | 366 protected void notifyChildMeta(MetadataMap childmeta) { |
| 367 List<DocuDirectory> children = cache.getChildren(this.dirName, true); | |
| 159 | 368 if (children.size() > 0) { |
| 531 | 369 /*for (DocuDirectory d: children) { |
| 159 | 370 // TODO: finish this! |
| 371 //((DocuDirectory) i.next()).readFileMeta() | |
| 531 | 372 }*/ |
| 130 | 373 } |
| 86 | 374 } |
| 375 | |
| 270 | 376 /** |
| 377 * Update access time. | |
| 86 | 378 * |
| 379 * @return long time of last access. | |
| 380 */ | |
| 381 public long touch() { | |
| 382 long t = objectATime; | |
| 383 objectATime = System.currentTimeMillis(); | |
| 384 return t; | |
| 385 } | |
| 386 | |
| 270 | 387 /** |
| 388 * Searches for the file with the name <code>fn</code>. | |
| 86 | 389 * |
| 270 | 390 * Searches the directory for the file with the name <code>fn</code> and |
| 391 * returns its index. Returns -1 if the file cannot be found. | |
| 392 * | |
| 393 * @param fn | |
| 394 * filename | |
| 395 * @param fc | |
| 396 * file class | |
| 86 | 397 * @return int index of file <code>fn</code> |
| 398 */ | |
| 399 public int indexOf(String fn) { | |
| 159 | 400 int fc = FileOps.classForFilename(fn); |
| 401 return indexOf(fn, fc); | |
| 402 } | |
| 270 | 403 |
| 404 /** | |
| 405 * Searches for the file with the name <code>fn</code> and class fc. | |
| 159 | 406 * |
| 270 | 407 * Searches the directory for the file with the name <code>fn</code> and |
| 408 * returns its index. Returns -1 if the file cannot be found. | |
| 409 * | |
| 410 * @param fn | |
| 411 * filename | |
| 159 | 412 * @return int index of file <code>fn</code> |
| 413 */ | |
| 414 public int indexOf(String fn, int fc) { | |
| 176 | 415 if (!isRead()) { |
| 416 // read directory now | |
| 417 if (!readDir()) { | |
| 418 return -1; | |
| 419 } | |
| 420 } | |
| 531 | 421 List<DocuDirent> fileList = list.get(fc); |
| 246 | 422 // empty directory? |
| 288 | 423 if (fileList == null) { |
| 246 | 424 return -1; |
| 425 } | |
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Bugfix for images not found in dir: added sorting for ArrayLists of ImageFilesets
hertzhaft
parents:
341
diff
changeset
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426 |
| 531 | 427 // search for exact match (DocuDirent does compareTo<String>) |
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428 // OBS: fileList needs to be sorted first (see )! <hertzhaft> |
| 288 | 429 int idx = Collections.binarySearch(fileList, fn); |
| 270 | 430 if (idx >= 0) { |
| 431 return idx; | |
| 432 } else { | |
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433 logger.debug(fn + " not found by binarysearch"); |
| 270 | 434 // try closest matches without extension |
| 282 | 435 idx = -idx - 1; |
| 288 | 436 if ((idx < fileList.size()) |
| 341 | 437 && isBaseInList(fileList, idx, fn)) { |
| 282 | 438 // idx matches |
| 439 return idx; | |
| 440 } else if ((idx > 0) | |
| 341 | 441 && isBaseInList(fileList, idx-1, fn)) { |
| 282 | 442 // idx-1 matches |
| 270 | 443 return idx - 1; |
| 288 | 444 } else if ((idx + 1 < fileList.size()) |
| 341 | 445 && isBaseInList(fileList, idx+1, fn)) { |
| 282 | 446 // idx+1 matches |
| 270 | 447 return idx + 1; |
| 86 | 448 } |
| 270 | 449 |
| 86 | 450 } |
| 451 return -1; | |
| 452 } | |
| 453 | |
| 531 | 454 private boolean isBaseInList(List<DocuDirent> fl, int idx, String fn) { |
| 455 String dfn = FileOps.basename((fl.get(idx)) | |
| 341 | 456 .getName()); |
| 457 return (dfn.equals(fn)||dfn.equals(FileOps.basename(fn))); | |
| 458 } | |
| 459 | |
| 460 | |
| 270 | 461 /** |
| 462 * Finds the DocuDirent with the name <code>fn</code>. | |
| 86 | 463 * |
| 270 | 464 * Searches the directory for the DocuDirent with the name <code>fn</code> |
| 465 * and returns it. Returns null if the file cannot be found. | |
| 466 * | |
| 467 * @param fn | |
| 468 * filename | |
| 187 | 469 * @return DocuDirent |
| 86 | 470 */ |
| 187 | 471 public DocuDirent find(String fn) { |
| 159 | 472 int fc = FileOps.classForFilename(fn); |
| 473 int i = indexOf(fn, fc); | |
| 86 | 474 if (i >= 0) { |
| 531 | 475 return (DocuDirent) list.get(0).get(i); |
| 159 | 476 } |
| 477 return null; | |
| 478 } | |
| 479 | |
| 270 | 480 /** |
| 481 * Finds the DocuDirent with the name <code>fn</code> and class | |
| 482 * <code>fc</code>. | |
| 159 | 483 * |
| 270 | 484 * Searches the directory for the DocuDirent with the name <code>fn</code> |
| 485 * and returns it. Returns null if the file cannot be found. | |
| 486 * | |
| 487 * @param fn | |
| 488 * filename | |
| 187 | 489 * @return DocuDirent |
| 159 | 490 */ |
| 187 | 491 public DocuDirent find(String fn, int fc) { |
| 159 | 492 int i = indexOf(fn, fc); |
| 493 if (i >= 0) { | |
| 531 | 494 return (DocuDirent) list.get(fc).get(i); |
| 86 | 495 } |
| 496 return null; | |
| 497 } | |
| 498 | |
| 499 /** | |
| 270 | 500 * Returns the digilib canonical name. |
| 501 * | |
| 502 * @return | |
| 86 | 503 */ |
| 504 public String getDirName() { | |
| 505 return dirName; | |
| 506 } | |
| 507 | |
| 270 | 508 /** |
| 509 * The directory is valid (exists on disk). | |
| 159 | 510 * |
| 86 | 511 * @return boolean |
| 512 */ | |
| 513 public boolean isValid() { | |
| 514 return isValid; | |
| 515 } | |
| 516 | |
| 270 | 517 /** |
| 518 * The directory has been read from disk. | |
| 159 | 519 * |
| 520 * @return | |
| 521 */ | |
| 522 public boolean isRead() { | |
| 523 return (dirMTime != 0); | |
| 524 } | |
| 525 | |
| 86 | 526 /** |
| 527 * @return long | |
| 528 */ | |
| 529 public long getAccessTime() { | |
| 530 return objectATime; | |
| 531 } | |
| 532 | |
| 533 /** | |
| 534 * @return Hashtable | |
| 535 */ | |
| 531 | 536 public MetadataMap getDirMeta() { |
| 86 | 537 return dirMeta; |
| 538 } | |
| 270 | 539 |
| 233 | 540 /** |
| 541 * Checks metadata | |
| 542 * | |
| 543 */ | |
| 544 public void checkMeta() { | |
| 545 if (metaChecked) { | |
| 546 return; | |
| 547 } else { | |
| 548 readMeta(); | |
| 549 } | |
| 550 } | |
| 86 | 551 |
| 552 /** | |
| 553 * @return long | |
| 554 */ | |
| 555 public long getDirMTime() { | |
| 556 return dirMTime; | |
| 557 } | |
| 558 | |
| 559 /** | |
| 560 * Sets the dirMeta. | |
| 270 | 561 * |
| 562 * @param dirMeta | |
| 563 * The dirMeta to set | |
| 86 | 564 */ |
| 531 | 565 public void setDirMeta(MetadataMap dirMeta) { |
| 86 | 566 this.dirMeta = dirMeta; |
| 567 } | |
| 568 | |
| 151 | 569 public boolean hasUnresolvedFileMeta() { |
| 570 return (this.unresolvedFileMeta != null); | |
| 571 } | |
| 572 | |
| 86 | 573 } |