001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.commons.compress.archivers.zip; 020 021import java.io.Serializable; 022import java.nio.file.attribute.FileTime; 023import java.util.Arrays; 024import java.util.Date; 025import java.util.Objects; 026import java.util.zip.ZipException; 027 028import org.apache.commons.compress.utils.TimeUtils; 029 030/** 031 * <p>An extra field that stores additional file and directory timestamp data 032 * for ZIP entries. Each ZIP entry can include up to three timestamps 033 * (modify, access, create*). The timestamps are stored as 32 bit signed 034 * integers representing seconds since UNIX epoch (Jan 1st, 1970, UTC). 035 * This field improves on ZIP's default timestamp granularity, since it 036 * allows one to store additional timestamps, and, in addition, the timestamps 037 * are stored using per-second granularity (zip's default behavior can only store 038 * timestamps to the nearest <em>even</em> second). 039 * </p><p> 040 * Unfortunately, 32 (signed) bits can only store dates up to the year 2037, 041 * and so this extra field will eventually be obsolete. Enjoy it while it lasts! 042 * </p> 043 * <ul> 044 * <li><b>modifyTime:</b> 045 * most recent time of file/directory modification 046 * (or file/dir creation if the entry has not been 047 * modified since it was created). 048 * </li> 049 * <li><b>accessTime:</b> 050 * most recent time file/directory was opened 051 * (e.g., read from disk). Many people disable 052 * their operating systems from updating this value 053 * using the NOATIME mount option to optimize disk behavior, 054 * and thus it's not always reliable. In those cases 055 * it's always equal to modifyTime. 056 * </li> 057 * <li><b>*createTime:</b> 058 * modern Linux file systems (e.g., ext2 and newer) 059 * do not appear to store a value like this, and so 060 * it's usually omitted altogether in the ZIP extra 061 * field. Perhaps other Unix systems track this. 062 * </li></ul> 063 * <p> 064 * We're using the field definition given in Info-Zip's source archive: 065 * zip-3.0.tar.gz/proginfo/extrafld.txt 066 * </p> 067 * <pre> 068 * Value Size Description 069 * ----- ---- ----------- 070 * 0x5455 Short tag for this extra block type ("UT") 071 * TSize Short total data size for this block 072 * Flags Byte info bits 073 * (ModTime) Long time of last modification (UTC/GMT) 074 * (AcTime) Long time of last access (UTC/GMT) 075 * (CrTime) Long time of original creation (UTC/GMT) 076 * 077 * Central-header version: 078 * 079 * Value Size Description 080 * ----- ---- ----------- 081 * 0x5455 Short tag for this extra block type ("UT") 082 * TSize Short total data size for this block 083 * Flags Byte info bits (refers to local header!) 084 * (ModTime) Long time of last modification (UTC/GMT) 085 * </pre> 086 * @since 1.5 087 */ 088public class X5455_ExtendedTimestamp implements ZipExtraField, Cloneable, Serializable { 089 private static final long serialVersionUID = 1L; 090 091 /** 092 * The header ID for this extra field. 093 * 094 * @since 1.23 095 */ 096 public static final ZipShort HEADER_ID = new ZipShort(0x5455); 097 098 /** 099 * The bit set inside the flags by when the last modification time 100 * is present in this extra field. 101 */ 102 public static final byte MODIFY_TIME_BIT = 1; 103 /** 104 * The bit set inside the flags by when the lasr access time is 105 * present in this extra field. 106 */ 107 public static final byte ACCESS_TIME_BIT = 2; 108 /** 109 * The bit set inside the flags by when the original creation time 110 * is present in this extra field. 111 */ 112 public static final byte CREATE_TIME_BIT = 4; 113 114 /** 115 * Utility method converts java.util.Date (milliseconds since epoch) 116 * into a ZipLong (seconds since epoch). 117 * <p/> 118 * Also makes sure the converted ZipLong is not too big to fit 119 * in 32 unsigned bits. 120 * 121 * @param d java.util.Date to convert to ZipLong 122 * @return ZipLong 123 */ 124 private static ZipLong dateToZipLong(final Date d) { 125 if (d == null) { 126 return null; 127 } 128 return unixTimeToZipLong(d.getTime() / 1000); 129 } 130 131 /** 132 * Utility method converts {@link FileTime} into a ZipLong (seconds since epoch). 133 * <p/> 134 * Also makes sure the converted ZipLong is not too big to fit 135 * in 32 unsigned bits. 136 * 137 * @param time {@link FileTime} to convert to ZipLong 138 * @return ZipLong 139 */ 140 private static ZipLong fileTimeToZipLong(final FileTime time) { 141 return time == null ? null : unixTimeToZipLong(TimeUtils.toUnixTime(time)); 142 } 143 144 private static FileTime unixTimeToFileTime(final ZipLong unixTime) { 145 return unixTime != null ? TimeUtils.unixTimeToFileTime(unixTime.getIntValue()) : null; 146 } 147 // The 3 boolean fields (below) come from this flag's byte. The remaining 5 bits 148 // are ignored according to the current version of the spec (December 2012). 149 150 private static ZipLong unixTimeToZipLong(final long unixTime) { 151 if (!TimeUtils.isUnixTime(unixTime)) { 152 throw new IllegalArgumentException("X5455 timestamps must fit in a signed 32 bit integer: " + unixTime); 153 } 154 return new ZipLong(unixTime); 155 } 156 157 private static Date zipLongToDate(final ZipLong unixTime) { 158 return unixTime != null ? new Date(unixTime.getIntValue() * 1000L) : null; 159 } 160 161 private byte flags; 162 // Note: even if bit1 and bit2 are set, the Central data will still not contain 163 // access/create fields: only local data ever holds those! This causes 164 // some of our implementation to look a little odd, with seemingly spurious 165 // != null and length checks. 166 private boolean bit0_modifyTimePresent; 167 private boolean bit1_accessTimePresent; 168 169 private boolean bit2_createTimePresent; 170 171 private ZipLong modifyTime; 172 173 private ZipLong accessTime; 174 175 private ZipLong createTime; 176 177 /** 178 * Constructor for X5455_ExtendedTimestamp. 179 */ 180 public X5455_ExtendedTimestamp() {} 181 182 @Override 183 public Object clone() throws CloneNotSupportedException { 184 return super.clone(); 185 } 186 187 @Override 188 public boolean equals(final Object o) { 189 if (o instanceof X5455_ExtendedTimestamp) { 190 final X5455_ExtendedTimestamp xf = (X5455_ExtendedTimestamp) o; 191 192 // The ZipLong==ZipLong clauses handle the cases where both are null. 193 // and only last 3 bits of flags matter. 194 return ((flags & 0x07) == (xf.flags & 0x07)) && 195 Objects.equals(modifyTime, xf.modifyTime) && 196 Objects.equals(accessTime, xf.accessTime) && 197 Objects.equals(createTime, xf.createTime); 198 } 199 return false; 200 } 201 202 /** 203 * Gets the access time as a {@link FileTime} 204 * of this ZIP entry, or null if no such timestamp exists in the ZIP entry. 205 * The milliseconds are always zeroed out, since the underlying data 206 * offers only per-second precision. 207 * 208 * @return modify time as {@link FileTime} or null. 209 * @since 1.23 210 */ 211 public FileTime getAccessFileTime() { 212 return unixTimeToFileTime(accessTime); 213 } 214 215 /** 216 * Gets the access time as a java.util.Date 217 * of this ZIP entry, or null if no such timestamp exists in the ZIP entry. 218 * The milliseconds are always zeroed out, since the underlying data 219 * offers only per-second precision. 220 * 221 * @return access time as java.util.Date or null. 222 */ 223 public Date getAccessJavaTime() { 224 return zipLongToDate(accessTime); 225 } 226 227 /** 228 * Gets the access time (seconds since epoch) of this ZIP entry 229 * as a ZipLong object, or null if no such timestamp exists in the 230 * ZIP entry. 231 * 232 * @return access time (seconds since epoch) or null. 233 */ 234 public ZipLong getAccessTime() { 235 return accessTime; 236 } 237 238 /** 239 * Gets the actual data to put into central directory data - without Header-ID 240 * or length specifier. 241 * 242 * @return the central directory data 243 */ 244 @Override 245 public byte[] getCentralDirectoryData() { 246 // Truncate out create & access time (last 8 bytes) from 247 // the copy of the local data we obtained: 248 return Arrays.copyOf(getLocalFileDataData(), getCentralDirectoryLength().getValue()); 249 } 250 251 /** 252 * Gets the length of the extra field in the local file data - without 253 * Header-ID or length specifier. 254 * 255 * <p>For X5455 the central length is often smaller than the 256 * local length, because central cannot contain access or create 257 * timestamps.</p> 258 * 259 * @return a {@code ZipShort} for the length of the data of this extra field 260 */ 261 @Override 262 public ZipShort getCentralDirectoryLength() { 263 return new ZipShort(1 + (bit0_modifyTimePresent ? 4 : 0)); 264 } 265 266 /** 267 * Gets the create time as a {@link FileTime} 268 * of this ZIP entry, or null if no such timestamp exists in the ZIP entry. 269 * The milliseconds are always zeroed out, since the underlying data 270 * offers only per-second precision. 271 * 272 * @return modify time as {@link FileTime} or null. 273 * @since 1.23 274 */ 275 public FileTime getCreateFileTime() { 276 return unixTimeToFileTime(createTime); 277 } 278 279 /** 280 * <p> 281 * Gets the create time as a java.util.Date 282 * of this ZIP entry, or null if no such timestamp exists in the ZIP entry. 283 * The milliseconds are always zeroed out, since the underlying data 284 * offers only per-second precision. 285 * </p> 286 * <p> 287 * Note: modern Linux file systems (e.g., ext2) 288 * do not appear to store a "create time" value, and so 289 * it's usually omitted altogether in the ZIP extra 290 * field. Perhaps other Unix systems track this. 291 * </p> 292 * 293 * @return create time as java.util.Date or null. 294 */ 295 public Date getCreateJavaTime() { 296 return zipLongToDate(createTime); 297 } 298 299 /** 300 * <p> 301 * Gets the create time (seconds since epoch) of this ZIP entry 302 * as a ZipLong object, or null if no such timestamp exists in the 303 * ZIP entry. 304 * </p> 305 * <p> 306 * Note: modern Linux file systems (e.g., ext2) 307 * do not appear to store a "create time" value, and so 308 * it's usually omitted altogether in the ZIP extra 309 * field. Perhaps other Unix systems track this. 310 * </p> 311 * 312 * @return create time (seconds since epoch) or null. 313 */ 314 public ZipLong getCreateTime() { 315 return createTime; 316 } 317 318 /** 319 * Gets flags byte. The flags byte tells us which of the 320 * three datestamp fields are present in the data: 321 * <pre> 322 * bit0 - modify time 323 * bit1 - access time 324 * bit2 - create time 325 * </pre> 326 * Only first 3 bits of flags are used according to the 327 * latest version of the spec (December 2012). 328 * 329 * @return flags byte indicating which of the 330 * three datestamp fields are present. 331 */ 332 public byte getFlags() { return flags; } 333 334 /** 335 * Gets the Header-ID. 336 * 337 * @return the value for the header id for this extrafield 338 */ 339 @Override 340 public ZipShort getHeaderId() { 341 return HEADER_ID; 342 } 343 344 /** 345 * Gets the actual data to put into local file data - without Header-ID 346 * or length specifier. 347 * 348 * @return get the data 349 */ 350 @Override 351 public byte[] getLocalFileDataData() { 352 final byte[] data = new byte[getLocalFileDataLength().getValue()]; 353 int pos = 0; 354 data[pos++] = 0; 355 if (bit0_modifyTimePresent) { 356 data[0] |= MODIFY_TIME_BIT; 357 System.arraycopy(modifyTime.getBytes(), 0, data, pos, 4); 358 pos += 4; 359 } 360 if (bit1_accessTimePresent && accessTime != null) { 361 data[0] |= ACCESS_TIME_BIT; 362 System.arraycopy(accessTime.getBytes(), 0, data, pos, 4); 363 pos += 4; 364 } 365 if (bit2_createTimePresent && createTime != null) { 366 data[0] |= CREATE_TIME_BIT; 367 System.arraycopy(createTime.getBytes(), 0, data, pos, 4); 368 pos += 4; // NOSONAR - assignment as documentation 369 } 370 return data; 371 } 372 373 /** 374 * Gets the length of the extra field in the local file data - without 375 * Header-ID or length specifier. 376 * 377 * @return a {@code ZipShort} for the length of the data of this extra field 378 */ 379 @Override 380 public ZipShort getLocalFileDataLength() { 381 return new ZipShort(1 + 382 (bit0_modifyTimePresent ? 4 : 0) + 383 (bit1_accessTimePresent && accessTime != null ? 4 : 0) + 384 (bit2_createTimePresent && createTime != null ? 4 : 0) 385 ); 386 } 387 388 /** 389 * Gets the modify time as a {@link FileTime} 390 * of this ZIP entry, or null if no such timestamp exists in the ZIP entry. 391 * The milliseconds are always zeroed out, since the underlying data 392 * offers only per-second precision. 393 * 394 * @return modify time as {@link FileTime} or null. 395 * @since 1.23 396 */ 397 public FileTime getModifyFileTime() { 398 return unixTimeToFileTime(modifyTime); 399 } 400 401 /** 402 * Gets the modify time as a java.util.Date 403 * of this ZIP entry, or null if no such timestamp exists in the ZIP entry. 404 * The milliseconds are always zeroed out, since the underlying data 405 * offers only per-second precision. 406 * 407 * @return modify time as java.util.Date or null. 408 */ 409 public Date getModifyJavaTime() { 410 return zipLongToDate(modifyTime); 411 } 412 413 /** 414 * Gets the modify time (seconds since epoch) of this ZIP entry 415 * as a ZipLong object, or null if no such timestamp exists in the 416 * ZIP entry. 417 * 418 * @return modify time (seconds since epoch) or null. 419 */ 420 public ZipLong getModifyTime() { return modifyTime; } 421 422 @Override 423 public int hashCode() { 424 int hc = (-123 * (flags & 0x07)); // only last 3 bits of flags matter 425 if (modifyTime != null) { 426 hc ^= modifyTime.hashCode(); 427 } 428 if (accessTime != null) { 429 // Since accessTime is often same as modifyTime, 430 // this prevents them from XOR negating each other. 431 hc ^= Integer.rotateLeft(accessTime.hashCode(), 11); 432 } 433 if (createTime != null) { 434 hc ^= Integer.rotateLeft(createTime.hashCode(), 22); 435 } 436 return hc; 437 } 438 439 /** 440 * Tests whether bit0 of the flags byte is set or not, 441 * which should correspond to the presence or absence of 442 * a modify timestamp in this particular ZIP entry. 443 * 444 * @return true if bit0 of the flags byte is set. 445 */ 446 public boolean isBit0_modifyTimePresent() { 447 return bit0_modifyTimePresent; 448 } 449 450 /** 451 * Tests whether bit1 of the flags byte is set or not, 452 * which should correspond to the presence or absence of 453 * a "last access" timestamp in this particular ZIP entry. 454 * 455 * @return true if bit1 of the flags byte is set. 456 */ 457 public boolean isBit1_accessTimePresent() { 458 return bit1_accessTimePresent; 459 } 460 461 /** 462 * Tests whether bit2 of the flags byte is set or not, 463 * which should correspond to the presence or absence of 464 * a create timestamp in this particular ZIP entry. 465 * 466 * @return true if bit2 of the flags byte is set. 467 */ 468 public boolean isBit2_createTimePresent() { 469 return bit2_createTimePresent; 470 } 471 472 /** 473 * Doesn't do anything special since this class always uses the 474 * same parsing logic for both central directory and local file data. 475 */ 476 @Override 477 public void parseFromCentralDirectoryData(final byte[] buffer, final int offset, final int length) throws ZipException { 478 reset(); 479 parseFromLocalFileData(buffer, offset, length); 480 } 481 482 /** 483 * Populate data from this array as if it was in local file data. 484 * 485 * @param data an array of bytes 486 * @param offset the start offset 487 * @param length the number of bytes in the array from offset 488 * @throws java.util.zip.ZipException on error 489 */ 490 @Override 491 public void parseFromLocalFileData(final byte[] data, int offset, final int length) throws ZipException { 492 reset(); 493 if (length < 1) { 494 throw new ZipException("X5455_ExtendedTimestamp too short, only " + length + " bytes"); 495 } 496 final int len = offset + length; 497 setFlags(data[offset++]); 498 if (bit0_modifyTimePresent && offset + 4 <= len) { 499 modifyTime = new ZipLong(data, offset); 500 offset += 4; 501 } else { 502 bit0_modifyTimePresent = false; 503 } 504 if (bit1_accessTimePresent && offset + 4 <= len) { 505 accessTime = new ZipLong(data, offset); 506 offset += 4; 507 } else { 508 bit1_accessTimePresent = false; 509 } 510 if (bit2_createTimePresent && offset + 4 <= len) { 511 createTime = new ZipLong(data, offset); 512 offset += 4; // NOSONAR - assignment as documentation 513 } else { 514 bit2_createTimePresent = false; 515 } 516 } 517 518 /** 519 * Reset state back to newly constructed state. Helps us make sure 520 * parse() calls always generate clean results. 521 */ 522 private void reset() { 523 setFlags((byte) 0); 524 this.modifyTime = null; 525 this.accessTime = null; 526 this.createTime = null; 527 } 528 529 /** 530 * <p> 531 * Sets the acccess time as a {@link FileTime} 532 * of this ZIP entry. Supplied value is truncated to per-second 533 * precision (milliseconds zeroed-out). 534 * </p><p> 535 * Note: the setters for flags and timestamps are decoupled. 536 * Even if the timestamp is not-null, it will only be written 537 * out if the corresponding bit in the flags is also set. 538 * </p> 539 * 540 * @param time access time as {@link FileTime} 541 * @since 1.23 542 */ 543 public void setAccessFileTime(final FileTime time) { 544 setAccessTime(fileTimeToZipLong(time)); 545 } 546 547 /** 548 * <p> 549 * Sets the access time as a java.util.Date 550 * of this ZIP entry. Supplied value is truncated to per-second 551 * precision (milliseconds zeroed-out). 552 * </p><p> 553 * Note: the setters for flags and timestamps are decoupled. 554 * Even if the timestamp is not-null, it will only be written 555 * out if the corresponding bit in the flags is also set. 556 * </p> 557 * 558 * @param d access time as java.util.Date 559 */ 560 public void setAccessJavaTime(final Date d) { 561 setAccessTime(dateToZipLong(d)); 562 } 563 564 /** 565 * <p> 566 * Sets the access time (seconds since epoch) of this ZIP entry 567 * using a ZipLong object 568 * </p><p> 569 * Note: the setters for flags and timestamps are decoupled. 570 * Even if the timestamp is not-null, it will only be written 571 * out if the corresponding bit in the flags is also set. 572 * </p> 573 * 574 * @param l ZipLong of the access time (seconds per epoch) 575 */ 576 public void setAccessTime(final ZipLong l) { 577 bit1_accessTimePresent = l != null; 578 flags = (byte) (l != null ? (flags | ACCESS_TIME_BIT) : (flags & ~ACCESS_TIME_BIT)); 579 this.accessTime = l; 580 } 581 582 /** 583 * <p> 584 * Sets the create time as a {@link FileTime} 585 * of this ZIP entry. Supplied value is truncated to per-second 586 * precision (milliseconds zeroed-out). 587 * </p><p> 588 * Note: the setters for flags and timestamps are decoupled. 589 * Even if the timestamp is not-null, it will only be written 590 * out if the corresponding bit in the flags is also set. 591 * </p> 592 * 593 * @param time create time as {@link FileTime} 594 * @since 1.23 595 */ 596 public void setCreateFileTime(final FileTime time) { 597 setCreateTime(fileTimeToZipLong(time)); 598 } 599 600 /** 601 * <p> 602 * Sets the create time as a java.util.Date 603 * of this ZIP entry. Supplied value is truncated to per-second 604 * precision (milliseconds zeroed-out). 605 * </p><p> 606 * Note: the setters for flags and timestamps are decoupled. 607 * Even if the timestamp is not-null, it will only be written 608 * out if the corresponding bit in the flags is also set. 609 * </p> 610 * 611 * @param d create time as java.util.Date 612 */ 613 public void setCreateJavaTime(final Date d) { setCreateTime(dateToZipLong(d)); } 614 615 /** 616 * <p> 617 * Sets the create time (seconds since epoch) of this ZIP entry 618 * using a ZipLong object 619 * </p><p> 620 * Note: the setters for flags and timestamps are decoupled. 621 * Even if the timestamp is not-null, it will only be written 622 * out if the corresponding bit in the flags is also set. 623 * </p> 624 * 625 * @param l ZipLong of the create time (seconds per epoch) 626 */ 627 public void setCreateTime(final ZipLong l) { 628 bit2_createTimePresent = l != null; 629 flags = (byte) (l != null ? (flags | CREATE_TIME_BIT) : (flags & ~CREATE_TIME_BIT)); 630 this.createTime = l; 631 } 632 633 /** 634 * Sets flags byte. The flags byte tells us which of the 635 * three datestamp fields are present in the data: 636 * <pre> 637 * bit0 - modify time 638 * bit1 - access time 639 * bit2 - create time 640 * </pre> 641 * Only first 3 bits of flags are used according to the 642 * latest version of the spec (December 2012). 643 * 644 * @param flags flags byte indicating which of the 645 * three datestamp fields are present. 646 */ 647 public void setFlags(final byte flags) { 648 this.flags = flags; 649 this.bit0_modifyTimePresent = (flags & MODIFY_TIME_BIT) == MODIFY_TIME_BIT; 650 this.bit1_accessTimePresent = (flags & ACCESS_TIME_BIT) == ACCESS_TIME_BIT; 651 this.bit2_createTimePresent = (flags & CREATE_TIME_BIT) == CREATE_TIME_BIT; 652 } 653 654 /** 655 * <p> 656 * Sets the modify time as a {@link FileTime} 657 * of this ZIP entry. Supplied value is truncated to per-second 658 * precision (milliseconds zeroed-out). 659 * </p><p> 660 * Note: the setters for flags and timestamps are decoupled. 661 * Even if the timestamp is not-null, it will only be written 662 * out if the corresponding bit in the flags is also set. 663 * </p> 664 * 665 * @param time modify time as {@link FileTime} 666 * @since 1.23 667 */ 668 public void setModifyFileTime(final FileTime time) { 669 setModifyTime(fileTimeToZipLong(time)); 670 } 671 672 /** 673 * <p> 674 * Sets the modify time as a java.util.Date 675 * of this ZIP entry. Supplied value is truncated to per-second 676 * precision (milliseconds zeroed-out). 677 * </p><p> 678 * Note: the setters for flags and timestamps are decoupled. 679 * Even if the timestamp is not-null, it will only be written 680 * out if the corresponding bit in the flags is also set. 681 * </p> 682 * 683 * @param d modify time as java.util.Date 684 */ 685 public void setModifyJavaTime(final Date d) { 686 setModifyTime(dateToZipLong(d)); 687 } 688 689 /** 690 * <p> 691 * Sets the modify time (seconds since epoch) of this ZIP entry 692 * using a ZipLong object. 693 * </p><p> 694 * Note: the setters for flags and timestamps are decoupled. 695 * Even if the timestamp is not-null, it will only be written 696 * out if the corresponding bit in the flags is also set. 697 * </p> 698 * 699 * @param l ZipLong of the modify time (seconds per epoch) 700 */ 701 public void setModifyTime(final ZipLong l) { 702 bit0_modifyTimePresent = l != null; 703 flags = (byte) (l != null ? (flags | MODIFY_TIME_BIT) : (flags & ~MODIFY_TIME_BIT)); 704 this.modifyTime = l; 705 } 706 707 /** 708 * Returns a String representation of this class useful for 709 * debugging purposes. 710 * 711 * @return A String representation of this class useful for 712 * debugging purposes. 713 */ 714 @Override 715 public String toString() { 716 final StringBuilder buf = new StringBuilder(); 717 buf.append("0x5455 Zip Extra Field: Flags="); 718 buf.append(Integer.toBinaryString(ZipUtil.unsignedIntToSignedByte(flags))).append(" "); 719 if (bit0_modifyTimePresent && modifyTime != null) { 720 final Date m = getModifyJavaTime(); 721 buf.append(" Modify:[").append(m).append("] "); 722 } 723 if (bit1_accessTimePresent && accessTime != null) { 724 final Date a = getAccessJavaTime(); 725 buf.append(" Access:[").append(a).append("] "); 726 } 727 if (bit2_createTimePresent && createTime != null) { 728 final Date c = getCreateJavaTime(); 729 buf.append(" Create:[").append(c).append("] "); 730 } 731 return buf.toString(); 732 } 733 734}