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/* net.sf.jazzlib.ZipEntry
Copyright (C) 2001, 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package net.sf.jazzlib;
import java.util.Calendar;
import java.util.Date;
/**
* This class represents a member of a zip archive. ZipFile and ZipInputStream
* will give you instances of this class as information about the members in an
* archive. On the other hand ZipOutputStream needs an instance of this class to
* create a new member.
*
* @author Jochen Hoenicke
*/
public class ZipEntry implements ZipConstants, Cloneable {
private static int KNOWN_SIZE = 1;
private static int KNOWN_CSIZE = 2;
private static int KNOWN_CRC = 4;
private static int KNOWN_TIME = 8;
private static Calendar cal;
private final String name;
private int size;
private int compressedSize;
private int crc;
private int dostime;
private short known = 0;
private short method = -1;
private byte[] extra = null;
private String comment = null;
int flags; /* used by ZipOutputStream */
int offset; /* used by ZipFile and ZipOutputStream */
/**
* Compression method. This method doesn't compress at all.
*/
public final static int STORED = 0;
/**
* Compression method. This method uses the Deflater.
*/
public final static int DEFLATED = 8;
/**
* Creates a zip entry with the given name.
*
* @param name
* the name. May include directory components separated by '/'.
*
* @exception NullPointerException
* when name is null.
* @exception IllegalArgumentException
* when name is bigger then 65535 chars.
*/
public ZipEntry(final String name) {
final int length = name.length();
if (length > 65535) {
throw new IllegalArgumentException("name length is " + length);
}
this.name = name;
}
/**
* Creates a copy of the given zip entry.
*
* @param e
* the entry to copy.
*/
public ZipEntry(final ZipEntry e) {
name = e.name;
known = e.known;
size = e.size;
compressedSize = e.compressedSize;
crc = e.crc;
dostime = e.dostime;
method = e.method;
extra = e.extra;
comment = e.comment;
}
final void setDOSTime(final int dostime) {
this.dostime = dostime;
known |= KNOWN_TIME;
}
final int getDOSTime() {
if ((known & KNOWN_TIME) == 0) {
return 0;
} else {
return dostime;
}
}
/**
* Creates a copy of this zip entry.
*/
/**
* Clones the entry.
*/
@Override
public Object clone() {
try {
// The JCL says that the `extra' field is also copied.
final ZipEntry clone = (ZipEntry) super.clone();
if (extra != null) {
clone.extra = extra.clone();
}
return clone;
} catch (final CloneNotSupportedException ex) {
throw new InternalError();
}
}
/**
* Returns the entry name. The path components in the entry are always
* separated by slashes ('/').
*/
public String getName() {
return name;
}
/**
* Sets the time of last modification of the entry.
*
* @time the time of last modification of the entry.
*/
public void setTime(final long time) {
final Calendar cal = getCalendar();
synchronized (cal) {
cal.setTime(new Date(time * 1000L));
dostime = (((cal.get(Calendar.YEAR) - 1980) & 0x7f) << 25)
| ((cal.get(Calendar.MONTH) + 1) << 21)
| ((cal.get(Calendar.DAY_OF_MONTH)) << 16)
| ((cal.get(Calendar.HOUR_OF_DAY)) << 11)
| ((cal.get(Calendar.MINUTE)) << 5)
| ((cal.get(Calendar.SECOND)) >> 1);
}
dostime = (int) (dostime / 1000L);
this.known |= KNOWN_TIME;
}
/**
* Gets the time of last modification of the entry.
*
* @return the time of last modification of the entry, or -1 if unknown.
*/
public long getTime() {
if ((known & KNOWN_TIME) == 0) {
return -1;
}
final int sec = 2 * (dostime & 0x1f);
final int min = (dostime >> 5) & 0x3f;
final int hrs = (dostime >> 11) & 0x1f;
final int day = (dostime >> 16) & 0x1f;
final int mon = ((dostime >> 21) & 0xf) - 1;
final int year = ((dostime >> 25) & 0x7f) + 1980; /* since 1900 */
try {
cal = getCalendar();
synchronized (cal) {
cal.set(year, mon, day, hrs, min, sec);
return cal.getTime().getTime();
}
} catch (final RuntimeException ex) {
/* Ignore illegal time stamp */
known &= ~KNOWN_TIME;
return -1;
}
}
private static synchronized Calendar getCalendar() {
if (cal == null) {
cal = Calendar.getInstance();
}
return cal;
}
/**
* Sets the size of the uncompressed data.
*
* @exception IllegalArgumentException
* if size is not in 0..0xffffffffL
*/
public void setSize(final long size) {
if ((size & 0xffffffff00000000L) != 0) {
throw new IllegalArgumentException();
}
this.size = (int) size;
this.known |= KNOWN_SIZE;
}
/**
* Gets the size of the uncompressed data.
*
* @return the size or -1 if unknown.
*/
public long getSize() {
return (known & KNOWN_SIZE) != 0 ? size & 0xffffffffL : -1L;
}
/**
* Sets the size of the compressed data.
*
* @exception IllegalArgumentException
* if size is not in 0..0xffffffffL
*/
public void setCompressedSize(final long csize) {
if ((csize & 0xffffffff00000000L) != 0) {
throw new IllegalArgumentException();
}
this.compressedSize = (int) csize;
this.known |= KNOWN_CSIZE;
}
/**
* Gets the size of the compressed data.
*
* @return the size or -1 if unknown.
*/
public long getCompressedSize() {
return (known & KNOWN_CSIZE) != 0 ? compressedSize & 0xffffffffL : -1L;
}
/**
* Sets the crc of the uncompressed data.
*
* @exception IllegalArgumentException
* if crc is not in 0..0xffffffffL
*/
public void setCrc(final long crc) {
if ((crc & 0xffffffff00000000L) != 0) {
throw new IllegalArgumentException();
}
this.crc = (int) crc;
this.known |= KNOWN_CRC;
}
/**
* Gets the crc of the uncompressed data.
*
* @return the crc or -1 if unknown.
*/
public long getCrc() {
return (known & KNOWN_CRC) != 0 ? crc & 0xffffffffL : -1L;
}
/**
* Sets the compression method. Only DEFLATED and STORED are supported.
*
* @exception IllegalArgumentException
* if method is not supported.
* @see ZipOutputStream#DEFLATED
* @see ZipOutputStream#STORED
*/
public void setMethod(final int method) {
if ((method != ZipOutputStream.STORED)
&& (method != ZipOutputStream.DEFLATED)) {
throw new IllegalArgumentException();
}
this.method = (short) method;
}
/**
* Gets the compression method.
*
* @return the compression method or -1 if unknown.
*/
public int getMethod() {
return method;
}
/**
* Sets the extra data.
*
* @exception IllegalArgumentException
* if extra is longer than 0xffff bytes.
*/
public void setExtra(final byte[] extra) {
if (extra == null) {
this.extra = null;
return;
}
if (extra.length > 0xffff) {
throw new IllegalArgumentException();
}
this.extra = extra;
try {
int pos = 0;
while (pos < extra.length) {
final int sig = (extra[pos++] & 0xff)
| ((extra[pos++] & 0xff) << 8);
final int len = (extra[pos++] & 0xff)
| ((extra[pos++] & 0xff) << 8);
if (sig == 0x5455) {
/* extended time stamp */
final int flags = extra[pos];
if ((flags & 1) != 0) {
final long time = ((extra[pos + 1] & 0xff)
| ((extra[pos + 2] & 0xff) << 8)
| ((extra[pos + 3] & 0xff) << 16) | ((extra[pos + 4] & 0xff) << 24));
setTime(time);
}
}
pos += len;
}
} catch (final ArrayIndexOutOfBoundsException ex) {
/* be lenient */
return;
}
}
/**
* Gets the extra data.
*
* @return the extra data or null if not set.
*/
public byte[] getExtra() {
return extra;
}
/**
* Sets the entry comment.
*
* @exception IllegalArgumentException
* if comment is longer than 0xffff.
*/
public void setComment(final String comment) {
if ((comment != null) && (comment.length() > 0xffff)) {
throw new IllegalArgumentException();
}
this.comment = comment;
}
/**
* Gets the comment.
*
* @return the comment or null if not set.
*/
public String getComment() {
return comment;
}
/**
* Gets true, if the entry is a directory. This is solely determined by the
* name, a trailing slash '/' marks a directory.
*/
public boolean isDirectory() {
final int nlen = name.length();
return (nlen > 0) && (name.charAt(nlen - 1) == '/');
}
/**
* Gets the string representation of this ZipEntry. This is just the name as
* returned by getName().
*/
@Override
public String toString() {
return name;
}
/**
* Gets the hashCode of this ZipEntry. This is just the hashCode of the
* name. Note that the equals method isn't changed, though.
*/
@Override
public int hashCode() {
return name.hashCode();
}
}
