org.apache.tools.tar
Class TarArchiveSparseEntry

java.lang.Object
  org.apache.tools.tar.TarArchiveSparseEntry

All Implemented Interfaces:

TarConstants

public class TarArchiveSparseEntry
extends java.lang.Object
implements TarConstants

This class represents a sparse entry in a Tar archive.

The C structure for a sparse entry is:

 struct posix_header {
 struct sparse sp[21]; // TarConstants.SPARSELEN_GNU_SPARSE     - offset 0
 char isextended;      // TarConstants.ISEXTENDEDLEN_GNU_SPARSE - offset 504
 };
 

Whereas, "struct sparse" is:

 struct sparse {
 char offset[12];   // offset 0
 char numbytes[12]; // offset 12
 };
 

Field Summary

Fields inherited from interface org.apache.tools.tar.TarConstants

ATIMELEN_GNU, CHKSUMLEN, CTIMELEN_GNU, DEVLEN, FORMAT_OLDGNU, FORMAT_POSIX, GIDLEN, GNAMELEN, GNU_LONGLINK, GNU_TMAGIC, ISEXTENDEDLEN_GNU, ISEXTENDEDLEN_GNU_SPARSE, LF_BLK, LF_CHR, LF_CONTIG, LF_DIR, LF_FIFO, LF_GNUTYPE_LONGNAME, LF_GNUTYPE_SPARSE, LF_LINK, LF_NORMAL, LF_OLDNORM, LF_PAX_EXTENDED_HEADER_LC, LF_PAX_EXTENDED_HEADER_UC, LF_PAX_GLOBAL_EXTENDED_HEADER, LF_SYMLINK, LONGNAMESLEN_GNU, MAGIC_OFFSET, MAGIC_POSIX, MAGICLEN, MAXID, MAXSIZE, MODELEN, MODTIMELEN, NAMELEN, OFFSETLEN_GNU, PAD2LEN_GNU, PREFIXLEN, PURE_MAGICLEN, REALSIZELEN_GNU, SIZELEN, SPARSELEN_GNU, SPARSELEN_GNU_SPARSE, TMAGIC, UIDLEN, UNAMELEN, VERSION_GNU_SPACE, VERSION_GNU_ZERO, VERSION_OFFSET, VERSION_POSIX, VERSIONLEN

Constructor Summary

TarArchiveSparseEntry(byte[] headerBuf)
Construct an entry from an archive's header bytes.

Method Summary

boolean

isExtended()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TarArchiveSparseEntry

public TarArchiveSparseEntry(byte[] headerBuf)
                      throws java.io.IOException

Construct an entry from an archive's header bytes. File is set to null.

Parameters:

headerBuf - The header bytes from a tar archive entry.

Throws:

java.io.IOException - on unknown format

Method Detail

isExtended

public boolean isExtended()