| /* |
| * Copyright (c) 1995, 2009, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.util.zip; |
| |
| import java.util.Date; |
| import sun.misc.BootClassLoaderHook; |
| |
| /** |
| * This class is used to represent a ZIP file entry. |
| * |
| * @author David Connelly |
| */ |
| public |
| class ZipEntry implements ZipConstants, Cloneable { |
| String name; // entry name |
| long time = -1; // modification time (in DOS time) |
| long crc = -1; // crc-32 of entry data |
| long size = -1; // uncompressed size of entry data |
| long csize = -1; // compressed size of entry data |
| int method = -1; // compression method |
| int flag = 0; // general purpose flag |
| byte[] extra; // optional extra field data for entry |
| String comment; // optional comment string for entry |
| |
| /** |
| * Compression method for uncompressed entries. |
| */ |
| public static final int STORED = 0; |
| |
| /** |
| * Compression method for compressed (deflated) entries. |
| */ |
| public static final int DEFLATED = 8; |
| |
| /** |
| * Creates a new zip entry with the specified name. |
| * |
| * @param name the entry name |
| * @exception NullPointerException if the entry name is null |
| * @exception IllegalArgumentException if the entry name is longer than |
| * 0xFFFF bytes |
| */ |
| public ZipEntry(String name) { |
| if (name == null) { |
| throw new NullPointerException(); |
| } |
| if (name.length() > 0xFFFF) { |
| throw new IllegalArgumentException("entry name too long"); |
| } |
| this.name = name; |
| } |
| |
| /** |
| * Creates a new zip entry with fields taken from the specified |
| * zip entry. |
| * @param e a zip Entry object |
| */ |
| public ZipEntry(ZipEntry e) { |
| name = e.name; |
| time = e.time; |
| crc = e.crc; |
| size = e.size; |
| csize = e.csize; |
| method = e.method; |
| flag = e.flag; |
| extra = e.extra; |
| comment = e.comment; |
| } |
| |
| /* |
| * Creates a new un-initialized zip entry |
| */ |
| ZipEntry() {} |
| |
| /** |
| * Returns the name of the entry. |
| * @return the name of the entry |
| */ |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * Sets the modification time of the entry. |
| * @param time the entry modification time in number of milliseconds |
| * since the epoch |
| * @see #getTime() |
| */ |
| public void setTime(long time) { |
| // Same value as defined in sun.jkernel.DownloadManager.KERNEL_STATIC_MODTIME |
| // to avoid direct reference to DownoadManager class. Need to revisit |
| // if this is needed any more (see comment in the DownloadManager class) |
| final int KERNEL_STATIC_MODTIME = 10000000; |
| BootClassLoaderHook hook = BootClassLoaderHook.getHook(); |
| if (hook != null && hook.isCurrentThreadPrefetching()) { |
| // fix for bug 6625963: we bypass time calculations while Kernel is |
| // downloading bundles, since they aren't necessary and would cause |
| // the Kernel core to depend upon the (very large) time zone data |
| this.time = KERNEL_STATIC_MODTIME; |
| } else { |
| this.time = javaToDosTime(time); |
| } |
| } |
| |
| /** |
| * Returns the modification time of the entry, or -1 if not specified. |
| * @return the modification time of the entry, or -1 if not specified |
| * @see #setTime(long) |
| */ |
| public long getTime() { |
| return time != -1 ? dosToJavaTime(time) : -1; |
| } |
| |
| /** |
| * Sets the uncompressed size of the entry data. |
| * @param size the uncompressed size in bytes |
| * @exception IllegalArgumentException if the specified size is less |
| * than 0, is greater than 0xFFFFFFFF when |
| * <a href="package-summary.html#zip64">ZIP64 format</a> is not supported, |
| * or is less than 0 when ZIP64 is supported |
| * @see #getSize() |
| */ |
| public void setSize(long size) { |
| if (size < 0) { |
| throw new IllegalArgumentException("invalid entry size"); |
| } |
| this.size = size; |
| } |
| |
| /** |
| * Returns the uncompressed size of the entry data, or -1 if not known. |
| * @return the uncompressed size of the entry data, or -1 if not known |
| * @see #setSize(long) |
| */ |
| public long getSize() { |
| return size; |
| } |
| |
| /** |
| * Returns the size of the compressed entry data, or -1 if not known. |
| * In the case of a stored entry, the compressed size will be the same |
| * as the uncompressed size of the entry. |
| * @return the size of the compressed entry data, or -1 if not known |
| * @see #setCompressedSize(long) |
| */ |
| public long getCompressedSize() { |
| return csize; |
| } |
| |
| /** |
| * Sets the size of the compressed entry data. |
| * @param csize the compressed size to set to |
| * @see #getCompressedSize() |
| */ |
| public void setCompressedSize(long csize) { |
| this.csize = csize; |
| } |
| |
| /** |
| * Sets the CRC-32 checksum of the uncompressed entry data. |
| * @param crc the CRC-32 value |
| * @exception IllegalArgumentException if the specified CRC-32 value is |
| * less than 0 or greater than 0xFFFFFFFF |
| * @see #getCrc() |
| */ |
| public void setCrc(long crc) { |
| if (crc < 0 || crc > 0xFFFFFFFFL) { |
| throw new IllegalArgumentException("invalid entry crc-32"); |
| } |
| this.crc = crc; |
| } |
| |
| /** |
| * Returns the CRC-32 checksum of the uncompressed entry data, or -1 if |
| * not known. |
| * @return the CRC-32 checksum of the uncompressed entry data, or -1 if |
| * not known |
| * @see #setCrc(long) |
| */ |
| public long getCrc() { |
| return crc; |
| } |
| |
| /** |
| * Sets the compression method for the entry. |
| * @param method the compression method, either STORED or DEFLATED |
| * @exception IllegalArgumentException if the specified compression |
| * method is invalid |
| * @see #getMethod() |
| */ |
| public void setMethod(int method) { |
| if (method != STORED && method != DEFLATED) { |
| throw new IllegalArgumentException("invalid compression method"); |
| } |
| this.method = method; |
| } |
| |
| /** |
| * Returns the compression method of the entry, or -1 if not specified. |
| * @return the compression method of the entry, or -1 if not specified |
| * @see #setMethod(int) |
| */ |
| public int getMethod() { |
| return method; |
| } |
| |
| /** |
| * Sets the optional extra field data for the entry. |
| * @param extra the extra field data bytes |
| * @exception IllegalArgumentException if the length of the specified |
| * extra field data is greater than 0xFFFF bytes |
| * @see #getExtra() |
| */ |
| public void setExtra(byte[] extra) { |
| if (extra != null && extra.length > 0xFFFF) { |
| throw new IllegalArgumentException("invalid extra field length"); |
| } |
| this.extra = extra; |
| } |
| |
| /** |
| * Returns the extra field data for the entry, or null if none. |
| * @return the extra field data for the entry, or null if none |
| * @see #setExtra(byte[]) |
| */ |
| public byte[] getExtra() { |
| return extra; |
| } |
| |
| /** |
| * Sets the optional comment string for the entry. |
| * |
| * <p>ZIP entry comments have maximum length of 0xffff. If the length of the |
| * specified comment string is greater than 0xFFFF bytes after encoding, only |
| * the first 0xFFFF bytes are output to the ZIP file entry. |
| * |
| * @param comment the comment string |
| * |
| * @see #getComment() |
| */ |
| public void setComment(String comment) { |
| this.comment = comment; |
| } |
| |
| /** |
| * Returns the comment string for the entry, or null if none. |
| * @return the comment string for the entry, or null if none |
| * @see #setComment(String) |
| */ |
| public String getComment() { |
| return comment; |
| } |
| |
| /** |
| * Returns true if this is a directory entry. A directory entry is |
| * defined to be one whose name ends with a '/'. |
| * @return true if this is a directory entry |
| */ |
| public boolean isDirectory() { |
| return name.endsWith("/"); |
| } |
| |
| /** |
| * Returns a string representation of the ZIP entry. |
| */ |
| public String toString() { |
| return getName(); |
| } |
| |
| /* |
| * Converts DOS time to Java time (number of milliseconds since epoch). |
| */ |
| private static long dosToJavaTime(long dtime) { |
| Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80), |
| (int)(((dtime >> 21) & 0x0f) - 1), |
| (int)((dtime >> 16) & 0x1f), |
| (int)((dtime >> 11) & 0x1f), |
| (int)((dtime >> 5) & 0x3f), |
| (int)((dtime << 1) & 0x3e)); |
| return d.getTime(); |
| } |
| |
| /* |
| * Converts Java time to DOS time. |
| */ |
| private static long javaToDosTime(long time) { |
| Date d = new Date(time); |
| int year = d.getYear() + 1900; |
| if (year < 1980) { |
| return (1 << 21) | (1 << 16); |
| } |
| return (year - 1980) << 25 | (d.getMonth() + 1) << 21 | |
| d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 | |
| d.getSeconds() >> 1; |
| } |
| |
| /** |
| * Returns the hash code value for this entry. |
| */ |
| public int hashCode() { |
| return name.hashCode(); |
| } |
| |
| /** |
| * Returns a copy of this entry. |
| */ |
| public Object clone() { |
| try { |
| ZipEntry e = (ZipEntry)super.clone(); |
| e.extra = (extra == null) ? null : extra.clone(); |
| return e; |
| } catch (CloneNotSupportedException e) { |
| // This should never happen, since we are Cloneable |
| throw new InternalError(); |
| } |
| } |
| } |
