Class TarArchiveEntry

  • All Implemented Interfaces:
    ArchiveEntry, EntryStreamOffsets, TarConstants

    public class TarArchiveEntry
    extends java.lang.Object
    implements ArchiveEntry, TarConstants, EntryStreamOffsets
    This class represents an entry in a Tar archive. It consists of the entry's header, as well as the entry's File. Entries can be instantiated in one of three ways, depending on how they are to be used.

    TarEntries that are created from the header bytes read from an archive are instantiated with the TarArchiveEntry(byte[]) constructor. These entries will be used when extracting from or listing the contents of an archive. These entries have their header filled in using the header bytes. They also set the File to null, since they reference an archive entry not a file.

    TarEntries that are created from Files that are to be written into an archive are instantiated with the TarArchiveEntry(File) or TarArchiveEntry(Path) constructor. These entries have their header filled in using the File's information. They also keep a reference to the File for convenience when writing entries.

    Finally, TarEntries can be constructed from nothing but a name. This allows the programmer to construct the entry by hand, for instance when only an InputStream is available for writing to the archive, and the header information is constructed from other information. In this case the header fields are set to defaults and the File is set to null.

    The C structure for a Tar Entry's header is:

     struct header {
     char name[100];     // TarConstants.NAMELEN    - offset   0
     char mode[8];       // TarConstants.MODELEN    - offset 100
     char uid[8];        // TarConstants.UIDLEN     - offset 108
     char gid[8];        // TarConstants.GIDLEN     - offset 116
     char size[12];      // TarConstants.SIZELEN    - offset 124
     char mtime[12];     // TarConstants.MODTIMELEN - offset 136
     char chksum[8];     // TarConstants.CHKSUMLEN  - offset 148
     char linkflag[1];   //                         - offset 156
     char linkname[100]; // TarConstants.NAMELEN    - offset 157
     The following fields are only present in new-style POSIX tar archives:
     char magic[6];      // TarConstants.MAGICLEN   - offset 257
     char version[2];    // TarConstants.VERSIONLEN - offset 263
     char uname[32];     // TarConstants.UNAMELEN   - offset 265
     char gname[32];     // TarConstants.GNAMELEN   - offset 297
     char devmajor[8];   // TarConstants.DEVLEN     - offset 329
     char devminor[8];   // TarConstants.DEVLEN     - offset 337
     char prefix[155];   // TarConstants.PREFIXLEN  - offset 345
     // Used if "name" field is not long enough to hold the path
     char pad[12];       // NULs                    - offset 500
     } header;
     All unused bytes are set to null.
     New-style GNU tar files are slightly different from the above.
     For values of size larger than 077777777777L (11 7s)
     or uid and gid larger than 07777777L (7 7s)
     the sign bit of the first byte is set, and the rest of the
     field is the binary representation of the number.
     See TarUtils.parseOctalOrBinary.
     

    The C structure for a old GNU Tar Entry's header is:

     struct oldgnu_header {
     char unused_pad1[345]; // TarConstants.PAD1LEN_GNU       - offset 0
     char atime[12];        // TarConstants.ATIMELEN_GNU      - offset 345
     char ctime[12];        // TarConstants.CTIMELEN_GNU      - offset 357
     char offset[12];       // TarConstants.OFFSETLEN_GNU     - offset 369
     char longnames[4];     // TarConstants.LONGNAMESLEN_GNU  - offset 381
     char unused_pad2;      // TarConstants.PAD2LEN_GNU       - offset 385
     struct sparse sp[4];   // TarConstants.SPARSELEN_GNU     - offset 386
     char isextended;       // TarConstants.ISEXTENDEDLEN_GNU - offset 482
     char realsize[12];     // TarConstants.REALSIZELEN_GNU   - offset 483
     char unused_pad[17];   // TarConstants.PAD3LEN_GNU       - offset 495
     };
     
    Whereas, "struct sparse" is:
     struct sparse {
     char offset[12];   // offset 0
     char numbytes[12]; // offset 12
     };
     

    The C structure for a xstar (Jörg Schilling star) Tar Entry's header is:

     struct star_header {
      char name[100];               // offset   0
      char mode[8];         // offset 100
      char uid[8];          // offset 108
      char gid[8];          // offset 116
      char size[12];                // offset 124
      char mtime[12];               // offset 136
      char chksum[8];               // offset 148
      char typeflag;                // offset 156
      char linkname[100];           // offset 157
      char magic[6];                // offset 257
      char version[2];              // offset 263
      char uname[32];               // offset 265
      char gname[32];               // offset 297
      char devmajor[8];             // offset 329
      char devminor[8];             // offset 337
      char prefix[131];             // offset 345
      char atime[12];             // offset 476
      char ctime[12];             // offset 488
      char mfill[8];              // offset 500
      char xmagic[4];             // offset 508  "tar"
     };
     

    which is identical to new-style POSIX up to the first 130 bytes of the prefix.

    • Field Detail

      • UNKNOWN

        public static final long UNKNOWN
        Value used to indicate unknown mode, user/groupids, device numbers and modTime when parsing a file in lenient mode and the archive contains illegal fields.
        Since:
        1.19
        See Also:
        Constant Field Values
      • MAX_NAMELEN

        public static final int MAX_NAMELEN
        Maximum length of a user's name in the tar file
        See Also:
        Constant Field Values
      • DEFAULT_DIR_MODE

        public static final int DEFAULT_DIR_MODE
        Default permissions bits for directories
        See Also:
        Constant Field Values
      • DEFAULT_FILE_MODE

        public static final int DEFAULT_FILE_MODE
        Default permissions bits for files
        See Also:
        Constant Field Values
      • MILLIS_PER_SECOND

        public static final int MILLIS_PER_SECOND
        Convert millis to seconds
        See Also:
        Constant Field Values
    • Constructor Detail

      • TarArchiveEntry

        public TarArchiveEntry​(java.lang.String name)
        Construct an entry with only a name. This allows the programmer to construct the entry's header "by hand". File is set to null.

        The entry's name will be the value of the name argument with all file separators replaced by forward slashes and leading slashes as well as Windows drive letters stripped.

        Parameters:
        name - the entry name
      • TarArchiveEntry

        public TarArchiveEntry​(java.lang.String name,
                               boolean preserveAbsolutePath)
        Construct an entry with only a name. This allows the programmer to construct the entry's header "by hand". File is set to null.

        The entry's name will be the value of the name argument with all file separators replaced by forward slashes. Leading slashes and Windows drive letters are stripped if preserveAbsolutePath is false.

        Parameters:
        name - the entry name
        preserveAbsolutePath - whether to allow leading slashes or drive letters in the name.
        Since:
        1.1
      • TarArchiveEntry

        public TarArchiveEntry​(java.lang.String name,
                               byte linkFlag)
        Construct an entry with a name and a link flag.

        The entry's name will be the value of the name argument with all file separators replaced by forward slashes and leading slashes as well as Windows drive letters stripped.

        Parameters:
        name - the entry name
        linkFlag - the entry link flag.
      • TarArchiveEntry

        public TarArchiveEntry​(java.lang.String name,
                               byte linkFlag,
                               boolean preserveAbsolutePath)
        Construct an entry with a name and a link flag.

        The entry's name will be the value of the name argument with all file separators replaced by forward slashes. Leading slashes and Windows drive letters are stripped if preserveAbsolutePath is false.

        Parameters:
        name - the entry name
        linkFlag - the entry link flag.
        preserveAbsolutePath - whether to allow leading slashes or drive letters in the name.
        Since:
        1.5
      • TarArchiveEntry

        public TarArchiveEntry​(java.io.File file)
        Construct an entry for a file. File is set to file, and the header is constructed from information from the file. The name is set from the normalized file path.

        The entry's name will be the value of the file's path with all file separators replaced by forward slashes and leading slashes as well as Windows drive letters stripped. The name will end in a slash if the file represents a directory.

        Note: Since 1.21 this internally uses the same code as the TarArchiveEntry constructors with a Path as parameter. But all thrown exceptions are ignored. If handling those exceptions is needed consider switching to the path constructors.

        Parameters:
        file - The file that the entry represents.
      • TarArchiveEntry

        public TarArchiveEntry​(java.nio.file.Path file)
                        throws java.io.IOException
        Construct an entry for a file. File is set to file, and the header is constructed from information from the file. The name is set from the normalized file path.

        The entry's name will be the value of the file's path with all file separators replaced by forward slashes and leading slashes as well as Windows drive letters stripped. The name will end in a slash if the file represents a directory.

        Parameters:
        file - The file that the entry represents.
        Throws:
        java.io.IOException - if an I/O error occurs
        Since:
        1.21
      • TarArchiveEntry

        public TarArchiveEntry​(java.io.File file,
                               java.lang.String fileName)
        Construct an entry for a file. File is set to file, and the header is constructed from information from the file.

        The entry's name will be the value of the fileName argument with all file separators replaced by forward slashes and leading slashes as well as Windows drive letters stripped. The name will end in a slash if the file represents a directory.

        Note: Since 1.21 this internally uses the same code as the TarArchiveEntry constructors with a Path as parameter. But all thrown exceptions are ignored. If handling those exceptions is needed consider switching to the path constructors.

        Parameters:
        file - The file that the entry represents.
        fileName - the name to be used for the entry.
      • TarArchiveEntry

        public TarArchiveEntry​(java.nio.file.Path file,
                               java.lang.String fileName,
                               java.nio.file.LinkOption... linkOptions)
                        throws java.io.IOException
        Construct an entry for a file. File is set to file, and the header is constructed from information from the file.

        The entry's name will be the value of the fileName argument with all file separators replaced by forward slashes and leading slashes as well as Windows drive letters stripped. The name will end in a slash if the file represents a directory.

        Parameters:
        file - The file that the entry represents.
        fileName - the name to be used for the entry.
        linkOptions - options indicating how symbolic links are handled.
        Throws:
        java.io.IOException - if an I/O error occurs
        Since:
        1.21
      • TarArchiveEntry

        public TarArchiveEntry​(byte[] headerBuf)
        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.lang.IllegalArgumentException - if any of the numeric fields have an invalid format
      • TarArchiveEntry

        public TarArchiveEntry​(byte[] headerBuf,
                               ZipEncoding encoding)
                        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.
        encoding - encoding to use for file names
        Throws:
        java.lang.IllegalArgumentException - if any of the numeric fields have an invalid format
        java.io.IOException - on error
        Since:
        1.4
      • TarArchiveEntry

        public TarArchiveEntry​(byte[] headerBuf,
                               ZipEncoding encoding,
                               boolean lenient)
                        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.
        encoding - encoding to use for file names
        lenient - when set to true illegal values for group/userid, mode, device numbers and timestamp will be ignored and the fields set to UNKNOWN. When set to false such illegal fields cause an exception instead.
        Throws:
        java.lang.IllegalArgumentException - if any of the numeric fields have an invalid format
        java.io.IOException - on error
        Since:
        1.19
      • TarArchiveEntry

        public TarArchiveEntry​(byte[] headerBuf,
                               ZipEncoding encoding,
                               boolean lenient,
                               long dataOffset)
                        throws java.io.IOException
        Construct an entry from an archive's header bytes for random access tar. File is set to null.
        Parameters:
        headerBuf - the header bytes from a tar archive entry.
        encoding - encoding to use for file names.
        lenient - when set to true illegal values for group/userid, mode, device numbers and timestamp will be ignored and the fields set to UNKNOWN. When set to false such illegal fields cause an exception instead.
        dataOffset - position of the entry data in the random access file.
        Throws:
        java.lang.IllegalArgumentException - if any of the numeric fields have an invalid format.
        java.io.IOException - on error.
        Since:
        1.21
    • Method Detail

      • equals

        public boolean equals​(TarArchiveEntry it)
        Determine if the two entries are equal. Equality is determined by the header names being equal.
        Parameters:
        it - Entry to be checked for equality.
        Returns:
        True if the entries are equal.
      • equals

        public boolean equals​(java.lang.Object it)
        Determine if the two entries are equal. Equality is determined by the header names being equal.
        Overrides:
        equals in class java.lang.Object
        Parameters:
        it - Entry to be checked for equality.
        Returns:
        True if the entries are equal.
      • hashCode

        public int hashCode()
        Hashcodes are based on entry names.
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        the entry hashcode
      • isDescendent

        public boolean isDescendent​(TarArchiveEntry desc)
        Determine if the given entry is a descendant of this entry. Descendancy is determined by the name of the descendant starting with this entry's name.
        Parameters:
        desc - Entry to be checked as a descendent of this.
        Returns:
        True if entry is a descendant of this.
      • getName

        public java.lang.String getName()
        Get this entry's name.

        This method returns the raw name as it is stored inside of the archive.

        Specified by:
        getName in interface ArchiveEntry
        Returns:
        This entry's name.
      • setName

        public void setName​(java.lang.String name)
        Set this entry's name.
        Parameters:
        name - This entry's new name.
      • setMode

        public void setMode​(int mode)
        Set the mode for this entry
        Parameters:
        mode - the mode for this entry
      • getLinkName

        public java.lang.String getLinkName()
        Get this entry's link name.
        Returns:
        This entry's link name.
      • setLinkName

        public void setLinkName​(java.lang.String link)
        Set this entry's link name.
        Parameters:
        link - the link name to use.
        Since:
        1.1
      • getUserId

        @Deprecated
        public int getUserId()
        Deprecated.
        use #getLongUserId instead as user ids can be bigger than Integer.MAX_VALUE
        Get this entry's user id.
        Returns:
        This entry's user id.
      • setUserId

        public void setUserId​(int userId)
        Set this entry's user id.
        Parameters:
        userId - This entry's new user id.
      • getLongUserId

        public long getLongUserId()
        Get this entry's user id.
        Returns:
        This entry's user id.
        Since:
        1.10
      • setUserId

        public void setUserId​(long userId)
        Set this entry's user id.
        Parameters:
        userId - This entry's new user id.
        Since:
        1.10
      • getGroupId

        @Deprecated
        public int getGroupId()
        Deprecated.
        use #getLongGroupId instead as group ids can be bigger than Integer.MAX_VALUE
        Get this entry's group id.
        Returns:
        This entry's group id.
      • setGroupId

        public void setGroupId​(int groupId)
        Set this entry's group id.
        Parameters:
        groupId - This entry's new group id.
      • getLongGroupId

        public long getLongGroupId()
        Get this entry's group id.
        Returns:
        This entry's group id.
        Since:
        1.10
      • setGroupId

        public void setGroupId​(long groupId)
        Set this entry's group id.
        Parameters:
        groupId - This entry's new group id.
        Since:
        1.10
      • getUserName

        public java.lang.String getUserName()
        Get this entry's user name.
        Returns:
        This entry's user name.
      • setUserName

        public void setUserName​(java.lang.String userName)
        Set this entry's user name.
        Parameters:
        userName - This entry's new user name.
      • getGroupName

        public java.lang.String getGroupName()
        Get this entry's group name.
        Returns:
        This entry's group name.
      • setGroupName

        public void setGroupName​(java.lang.String groupName)
        Set this entry's group name.
        Parameters:
        groupName - This entry's new group name.
      • setIds

        public void setIds​(int userId,
                           int groupId)
        Convenience method to set this entry's group and user ids.
        Parameters:
        userId - This entry's new user id.
        groupId - This entry's new group id.
      • setNames

        public void setNames​(java.lang.String userName,
                             java.lang.String groupName)
        Convenience method to set this entry's group and user names.
        Parameters:
        userName - This entry's new user name.
        groupName - This entry's new group name.
      • setModTime

        public void setModTime​(long time)
        Set this entry's modification time. The parameter passed to this method is in "Java time".
        Parameters:
        time - This entry's new modification time.
      • setModTime

        public void setModTime​(java.util.Date time)
        Set this entry's modification time.
        Parameters:
        time - This entry's new modification time.
      • setModTime

        public void setModTime​(java.nio.file.attribute.FileTime time)
        Set this entry's modification time.
        Parameters:
        time - This entry's new modification time.
        Since:
        1.21
      • getModTime

        public java.util.Date getModTime()
        Get this entry's modification time.
        Returns:
        This entry's modification time.
      • getLastModifiedDate

        public java.util.Date getLastModifiedDate()
        Description copied from interface: ArchiveEntry
        Gets the last modified date of this entry.
        Specified by:
        getLastModifiedDate in interface ArchiveEntry
        Returns:
        the last modified date of this entry.
      • isCheckSumOK

        public boolean isCheckSumOK()
        Get this entry's checksum status.
        Returns:
        if the header checksum is reasonably correct
        Since:
        1.5
        See Also:
        TarUtils.verifyCheckSum(byte[])
      • getFile

        public java.io.File getFile()
        Get this entry's file.

        This method is only useful for entries created from a File or Path but not for entries read from an archive.

        Returns:
        this entry's file or null if the entry was not created from a file.
      • getPath

        public java.nio.file.Path getPath()
        Get this entry's file.

        This method is only useful for entries created from a File or Path but not for entries read from an archive.

        Returns:
        this entry's file or null if the entry was not created from a file.
        Since:
        1.21
      • getMode

        public int getMode()
        Get this entry's mode.
        Returns:
        This entry's mode.
      • getSize

        public long getSize()
        Get this entry's file size.

        This is the size the entry's data uses inside of the archive. Usually this is the same as getRealSize(), but it doesn't take the "holes" into account when the entry represents a sparse file.

        Specified by:
        getSize in interface ArchiveEntry
        Returns:
        This entry's file size.
      • setSparseHeaders

        public void setSparseHeaders​(java.util.List<TarArchiveStructSparse> sparseHeaders)
        Set this entry's sparse headers
        Parameters:
        sparseHeaders - The new sparse headers
        Since:
        1.20
      • getSparseHeaders

        public java.util.List<TarArchiveStructSparse> getSparseHeaders()
        Get this entry's sparse headers
        Returns:
        This entry's sparse headers
        Since:
        1.20
      • getOrderedSparseHeaders

        public java.util.List<TarArchiveStructSparse> getOrderedSparseHeaders()
                                                                       throws java.io.IOException
        Get this entry's sparse headers ordered by offset with all empty sparse sections at the start filtered out.
        Returns:
        immutable list of this entry's sparse headers, never null
        Throws:
        java.io.IOException - if the list of sparse headers contains blocks that overlap
        Since:
        1.21
      • isPaxGNU1XSparse

        public boolean isPaxGNU1XSparse()
        Get if this entry is a sparse file with 1.X PAX Format or not
        Returns:
        True if this entry is a sparse file with 1.X PAX Format
        Since:
        1.20
      • setSize

        public void setSize​(long size)
        Set this entry's file size.
        Parameters:
        size - This entry's new file size.
        Throws:
        java.lang.IllegalArgumentException - if the size is < 0.
      • getDevMajor

        public int getDevMajor()
        Get this entry's major device number.
        Returns:
        This entry's major device number.
        Since:
        1.4
      • setDevMajor

        public void setDevMajor​(int devNo)
        Set this entry's major device number.
        Parameters:
        devNo - This entry's major device number.
        Throws:
        java.lang.IllegalArgumentException - if the devNo is < 0.
        Since:
        1.4
      • getDevMinor

        public int getDevMinor()
        Get this entry's minor device number.
        Returns:
        This entry's minor device number.
        Since:
        1.4
      • setDevMinor

        public void setDevMinor​(int devNo)
        Set this entry's minor device number.
        Parameters:
        devNo - This entry's minor device number.
        Throws:
        java.lang.IllegalArgumentException - if the devNo is < 0.
        Since:
        1.4
      • isExtended

        public boolean isExtended()
        Indicates in case of an oldgnu sparse file if an extension sparse header follows.
        Returns:
        true if an extension oldgnu sparse header follows.
      • getRealSize

        public long getRealSize()
        Get this entry's real file size in case of a sparse file.

        This is the size a file would take on disk if the entry was expanded.

        If the file is not a sparse file, return size instead of realSize.

        Returns:
        This entry's real file size, if the file is not a sparse file, return size instead of realSize.
      • isGNUSparse

        public boolean isGNUSparse()
        Indicate if this entry is a GNU sparse block.
        Returns:
        true if this is a sparse extension provided by GNU tar
      • isOldGNUSparse

        public boolean isOldGNUSparse()
        Indicate if this entry is a GNU or star sparse block using the oldgnu format.
        Returns:
        true if this is a sparse extension provided by GNU tar or star
        Since:
        1.11
      • isPaxGNUSparse

        public boolean isPaxGNUSparse()
        Indicate if this entry is a GNU sparse block using one of the PAX formats.
        Returns:
        true if this is a sparse extension provided by GNU tar
        Since:
        1.11
      • isStarSparse

        public boolean isStarSparse()
        Indicate if this entry is a star sparse block using PAX headers.
        Returns:
        true if this is a sparse extension provided by star
        Since:
        1.11
      • isGNULongLinkEntry

        public boolean isGNULongLinkEntry()
        Indicate if this entry is a GNU long linkname block
        Returns:
        true if this is a long name extension provided by GNU tar
      • isGNULongNameEntry

        public boolean isGNULongNameEntry()
        Indicate if this entry is a GNU long name block
        Returns:
        true if this is a long name extension provided by GNU tar
      • isPaxHeader

        public boolean isPaxHeader()
        Check if this is a Pax header.
        Returns:
        true if this is a Pax header.
        Since:
        1.1
      • isGlobalPaxHeader

        public boolean isGlobalPaxHeader()
        Check if this is a Pax header.
        Returns:
        true if this is a Pax header.
        Since:
        1.1
      • isDirectory

        public boolean isDirectory()
        Return whether or not this entry represents a directory.
        Specified by:
        isDirectory in interface ArchiveEntry
        Returns:
        True if this entry is a directory.
      • isFile

        public boolean isFile()
        Check if this is a "normal file"
        Returns:
        whether this is a "normal file"
        Since:
        1.2
      • isSymbolicLink

        public boolean isSymbolicLink()
        Check if this is a symbolic link entry.
        Returns:
        whether this is a symbolic link
        Since:
        1.2
      • isLink

        public boolean isLink()
        Check if this is a link entry.
        Returns:
        whether this is a link entry
        Since:
        1.2
      • isCharacterDevice

        public boolean isCharacterDevice()
        Check if this is a character device entry.
        Returns:
        whether this is a character device
        Since:
        1.2
      • isBlockDevice

        public boolean isBlockDevice()
        Check if this is a block device entry.
        Returns:
        whether this is a block device
        Since:
        1.2
      • isFIFO

        public boolean isFIFO()
        Check if this is a FIFO (pipe) entry.
        Returns:
        whether this is a FIFO entry
        Since:
        1.2
      • isSparse

        public boolean isSparse()
        Check whether this is a sparse entry.
        Returns:
        whether this is a sparse entry
        Since:
        1.11
      • getDataOffset

        public long getDataOffset()
        Gets the offset of data stream within the archive file,
        Specified by:
        getDataOffset in interface EntryStreamOffsets
        Returns:
        the offset of entry data stream, OFFSET_UNKNOWN if not known.
        Since:
        1.21
      • setDataOffset

        public void setDataOffset​(long dataOffset)
        Set the offset of the data for the tar entry.
        Parameters:
        dataOffset - the position of the data in the tar.
        Since:
        1.21
      • isStreamContiguous

        public boolean isStreamContiguous()
        Indicates whether the stream is contiguous, i.e. not split among several archive parts, interspersed with control blocks, etc.
        Specified by:
        isStreamContiguous in interface EntryStreamOffsets
        Returns:
        true if stream is contiguous, false otherwise.
        Since:
        1.21
      • getExtraPaxHeaders

        public java.util.Map<java.lang.String,​java.lang.String> getExtraPaxHeaders()
        get extra PAX Headers
        Returns:
        read-only map containing any extra PAX Headers
        Since:
        1.15
      • clearExtraPaxHeaders

        public void clearExtraPaxHeaders()
        clear all extra PAX headers.
        Since:
        1.15
      • addPaxHeader

        public void addPaxHeader​(java.lang.String name,
                                 java.lang.String value)
        add a PAX header to this entry. If the header corresponds to an existing field in the entry, that field will be set; otherwise the header will be added to the extraPaxHeaders Map
        Parameters:
        name - The full name of the header to set.
        value - value of header.
        Since:
        1.15
      • getExtraPaxHeader

        public java.lang.String getExtraPaxHeader​(java.lang.String name)
        get named extra PAX header
        Parameters:
        name - The full name of an extended PAX header to retrieve
        Returns:
        The value of the header, if any.
        Since:
        1.15
      • getDirectoryEntries

        public TarArchiveEntry[] getDirectoryEntries()
        If this entry represents a file, and the file is a directory, return an array of TarEntries for this entry's children.

        This method is only useful for entries created from a File or Path but not for entries read from an archive.

        Returns:
        An array of TarEntry's for this entry's children.
      • writeEntryHeader

        public void writeEntryHeader​(byte[] outbuf)
        Write an entry's header information to a header buffer.

        This method does not use the star/GNU tar/BSD tar extensions.

        Parameters:
        outbuf - The tar entry header buffer to fill in.
      • writeEntryHeader

        public void writeEntryHeader​(byte[] outbuf,
                                     ZipEncoding encoding,
                                     boolean starMode)
                              throws java.io.IOException
        Write an entry's header information to a header buffer.
        Parameters:
        outbuf - The tar entry header buffer to fill in.
        encoding - encoding to use when writing the file name.
        starMode - whether to use the star/GNU tar/BSD tar extension for numeric fields if their value doesn't fit in the maximum size of standard tar archives
        Throws:
        java.io.IOException - on error
        Since:
        1.4
      • parseTarHeader

        public void parseTarHeader​(byte[] header)
        Parse an entry's header information from a header buffer.
        Parameters:
        header - The tar entry header buffer to get information from.
        Throws:
        java.lang.IllegalArgumentException - if any of the numeric fields have an invalid format
      • parseTarHeader

        public void parseTarHeader​(byte[] header,
                                   ZipEncoding encoding)
                            throws java.io.IOException
        Parse an entry's header information from a header buffer.
        Parameters:
        header - The tar entry header buffer to get information from.
        encoding - encoding to use for file names
        Throws:
        java.lang.IllegalArgumentException - if any of the numeric fields have an invalid format
        java.io.IOException - on error
        Since:
        1.4