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Class ZipEntry

java.lang.Object
- java.util.zip.ZipEntry

All Implemented Interfaces:: Cloneable

Direct Known Subclasses:: JarEntry

public class ZipEntry
extends Object
implements Cloneable

This class is used to represent a ZIP file entry.

Fields

STORED

public static final int STORED

Compression method for uncompressed entries.

DEFLATED

public static final int DEFLATED

Compression method for compressed (deflated) entries.

LOCSIG

public static final long LOCSIG

EXTSIG

public static final long EXTSIG

CENSIG

public static final long CENSIG

ENDSIG

public static final long ENDSIG

LOCHDR

public static final int LOCHDR

EXTHDR

public static final int EXTHDR

CENHDR

public static final int CENHDR

ENDHDR

public static final int ENDHDR

LOCVER

public static final int LOCVER

LOCFLG

public static final int LOCFLG

LOCHOW

public static final int LOCHOW

LOCTIM

public static final int LOCTIM

LOCCRC

public static final int LOCCRC

LOCSIZ

public static final int LOCSIZ

LOCLEN

public static final int LOCLEN

LOCNAM

public static final int LOCNAM

LOCEXT

public static final int LOCEXT

EXTCRC

public static final int EXTCRC

EXTSIZ

public static final int EXTSIZ

EXTLEN

public static final int EXTLEN

CENVEM

public static final int CENVEM

CENVER

public static final int CENVER

CENFLG

public static final int CENFLG

CENHOW

public static final int CENHOW

CENTIM

public static final int CENTIM

CENCRC

public static final int CENCRC

CENSIZ

public static final int CENSIZ

CENLEN

public static final int CENLEN

CENNAM

public static final int CENNAM

CENEXT

public static final int CENEXT

CENCOM

public static final int CENCOM

CENDSK

public static final int CENDSK

CENATT

public static final int CENATT

CENATX

public static final int CENATX

CENOFF

public static final int CENOFF

ENDSUB

public static final int ENDSUB

ENDTOT

public static final int ENDTOT

ENDSIZ

public static final int ENDSIZ

ENDOFF

public static final int ENDOFF

ENDCOM

public static final int ENDCOM

Constructors

ZipEntry

public ZipEntry(String name)

Creates a new zip entry with the specified name.

Parameters:: name - The entry name
Throws:: NullPointerException - if the entry name is null; IllegalArgumentException - if the entry name is longer than 0xFFFF bytes

ZipEntry

public ZipEntry(ZipEntry e)

Creates a new zip entry with fields taken from the specified zip entry.

Parameters:: e - A zip Entry object
Throws:: NullPointerException - if the entry object is null

Methods

getName

public String getName()

Returns the name of the entry.

Returns:: the name of the entry

setTime

public void setTime(long time)

Sets the last modification time of the entry.

If the entry is output to a ZIP file or ZIP file formatted output stream the last modification time set by this method will be stored into the date and time fields of the zip file entry and encoded in standard MS-DOS date and time format. The default TimeZone is used to convert the epoch time to the MS-DOS data and time.

Parameters:: time - The last modification time of the entry in milliseconds since the epoch
See Also:: getTime(), getLastModifiedTime()

getTime

public long getTime()

Returns the last modification time of the entry.

If the entry is read from a ZIP file or ZIP file formatted input stream, this is the last modification time from the date and time fields of the zip file entry. The default TimeZone is used to convert the standard MS-DOS formatted date and time to the epoch time.

Returns:: The last modification time of the entry in milliseconds since the epoch, or -1 if not specified
See Also:: setTime(long), setLastModifiedTime(FileTime)

setLastModifiedTime

public ZipEntry setLastModifiedTime(FileTime time)

Sets the last modification time of the entry.

When output to a ZIP file or ZIP file formatted output stream the last modification time set by this method will be stored into zip file entry's date and time fields in standard MS-DOS date and time format), and the extended timestamp fields in optional extra data in UTC time.

Parameters:: time - The last modification time of the entry
Returns:: This zip entry
Throws:: NullPointerException - if the time is null
Since:: 1.8
See Also:: getLastModifiedTime()

getLastModifiedTime

public FileTime getLastModifiedTime()

Returns the last modification time of the entry.

If the entry is read from a ZIP file or ZIP file formatted input stream, this is the last modification time from the zip file entry's optional extra data if the extended timestamp fields are present. Otherwise the last modification time is read from the entry's date and time fields, the default TimeZone is used to convert the standard MS-DOS formatted date and time to the epoch time.

Returns:: The last modification time of the entry, null if not specified
Since:: 1.8
See Also:: setLastModifiedTime(FileTime)

setLastAccessTime

public ZipEntry setLastAccessTime(FileTime time)

Sets the last access time of the entry.

If set, the last access time will be stored into the extended timestamp fields of entry's optional extra data, when output to a ZIP file or ZIP file formatted stream.

Parameters:: time - The last access time of the entry
Returns:: This zip entry
Throws:: NullPointerException - if the time is null
Since:: 1.8
See Also:: getLastAccessTime()

getLastAccessTime

public FileTime getLastAccessTime()

Returns the last access time of the entry.

The last access time is from the extended timestamp fields of entry's optional extra data when read from a ZIP file or ZIP file formatted stream.

Returns:: The last access time of the entry, null if not specified
Since:: 1.8
See Also:: setLastAccessTime(FileTime)

setCreationTime

public ZipEntry setCreationTime(FileTime time)

Sets the creation time of the entry.

If set, the creation time will be stored into the extended timestamp fields of entry's optional extra data, when output to a ZIP file or ZIP file formatted stream.

Parameters:: time - The creation time of the entry
Returns:: This zip entry
Throws:: NullPointerException - if the time is null
Since:: 1.8
See Also:: getCreationTime()

getCreationTime

public FileTime getCreationTime()

Returns the creation time of the entry.

The creation time is from the extended timestamp fields of entry's optional extra data when read from a ZIP file or ZIP file formatted stream.

Returns:: the creation time of the entry, null if not specified
Since:: 1.8
See Also:: setCreationTime(FileTime)

setSize

public void setSize(long size)

Sets the uncompressed size of the entry data.

Parameters:: size - the uncompressed size in bytes
Throws:: IllegalArgumentException - if the specified size is less than 0, is greater than 0xFFFFFFFF when ZIP64 format is not supported, or is less than 0 when ZIP64 is supported
See Also:: getSize()

getSize

public long getSize()

Returns the uncompressed size of the entry data.

Returns:: the uncompressed size of the entry data, or -1 if not known
See Also:: setSize(long)

getCompressedSize

public long getCompressedSize()

Returns the size of the compressed entry data.

In the case of a stored entry, the compressed size will be the same as the uncompressed size of the entry.

Returns:: the size of the compressed entry data, or -1 if not known
See Also:: setCompressedSize(long)

setCompressedSize

public void setCompressedSize(long csize)

Sets the size of the compressed entry data.

Parameters:: csize - the compressed size to set to
See Also:: getCompressedSize()

setCrc

public void setCrc(long crc)

Sets the CRC-32 checksum of the uncompressed entry data.

Parameters:: crc - the CRC-32 value
Throws:: IllegalArgumentException - if the specified CRC-32 value is less than 0 or greater than 0xFFFFFFFF
See Also:: getCrc()

getCrc

public long getCrc()

Returns the CRC-32 checksum of the uncompressed entry data.

Returns:: the CRC-32 checksum of the uncompressed entry data, or -1 if not known
See Also:: setCrc(long)

setMethod

public void setMethod(int method)

Sets the compression method for the entry.

Parameters:: method - the compression method, either STORED or DEFLATED
Throws:: IllegalArgumentException - if the specified compression method is invalid
See Also:: getMethod()

getMethod

public int getMethod()

Returns the compression method of the entry.

Returns:: the compression method of the entry, or -1 if not specified
See Also:: setMethod(int)

setExtra

public void setExtra(byte[] extra)

Sets the optional extra field data for the entry.

Invoking this method may change this entry's last modification time, last access time and creation time, if the extra field data includes the extensible timestamp fields, such as NTFS tag 0x0001 or Info-ZIP Extended Timestamp, as specified in Info-ZIP Application Note 970311.

Parameters:: extra - The extra field data bytes
Throws:: IllegalArgumentException - if the length of the specified extra field data is greater than 0xFFFF bytes
See Also:: getExtra()

getExtra

public byte[] getExtra()

Returns the extra field data for the entry.

Returns:: the extra field data for the entry, or null if none
See Also:: setExtra(byte[])

setComment

public void setComment(String comment)

Sets the optional comment string for the entry.

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.

Parameters:: comment - the comment string
See Also:: getComment()

getComment

public String getComment()

Returns the comment string for the entry.

Returns:: the comment string for the entry, or null if none
See Also:: setComment(String)

isDirectory

public boolean isDirectory()

Returns true if this is a directory entry. A directory entry is defined to be one whose name ends with a '/'.

Returns:: true if this is a directory entry

toString

public String toString()

Returns a string representation of the ZIP entry.

Overrides:: toString in class Object
Returns:: a string representation of the object.

hashCode

public int hashCode()

Returns the hash code value for this entry.

Overrides:: hashCode in class Object
Returns:: a hash code value for this object.
See Also:: Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

clone

public Object clone()

Returns a copy of this entry.

Overrides:: clone in class Object
Returns:: a clone of this instance.
See Also:: Cloneable

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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