Class TarArchiveOutputStream
java.lang.Object
java.io.OutputStream
org.apache.commons.compress.archivers.ArchiveOutputStream
org.apache.commons.compress.archivers.tar.TarArchiveOutputStream
- All Implemented Interfaces:
Closeable
,Flushable
,AutoCloseable
The TarOutputStream writes a UNIX tar archive as an OutputStream. Methods are provided to put
entries, and then write their contents by writing to this stream using write().
tar archives consist of a sequence of records of 512 bytes each that are grouped into blocks. Prior to Apache Commons Compress 1.14 it has been possible to configure a record size different from 512 bytes and arbitrary block sizes. Starting with Compress 1.15 512 is the only valid option for the record size and the block size must be a multiple of 512. Also the default block size changed from 10240 bytes prior to Compress 1.15 to 512 bytes with Compress 1.15.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate boolean
private static final ZipEncoding
static final int
Fail if a big number (e.g.static final int
POSIX/PAX extensions are used to store big numbers in the archive.static final int
star/GNU tar/BSD tar extensions are used to store big number in the archive.private int
private static final int
private boolean
private final CountingOutputStream
private long
private String
private long
(package private) final String
private boolean
indicates if this archive is finishedprivate boolean
Indicates if putArchiveEntry has been called without closeArchiveEntrystatic final int
Fail if a long file name is required in the archive.static final int
GNU tar extensions are used to store long file names in the archive.static final int
POSIX/PAX extensions are used to store long file names in the archive.static final int
Long paths will be truncated in the archive.private int
private final FixedLengthBlockOutputStream
private static final int
private final byte[]
private final int
private int
private final ZipEncoding
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Constructor Summary
ConstructorsConstructorDescriptionConstructor for TarArchiveOutputStream.TarArchiveOutputStream
(OutputStream os, int blockSize) Constructor for TarArchiveOutputStream.TarArchiveOutputStream
(OutputStream os, int blockSize, int recordSize) Deprecated.recordSize must always be 512 bytes.TarArchiveOutputStream
(OutputStream os, int blockSize, int recordSize, String encoding) Deprecated.recordSize must always be 512 bytes.TarArchiveOutputStream
(OutputStream os, int blockSize, String encoding) Constructor for TarArchiveOutputStream.TarArchiveOutputStream
(OutputStream os, String encoding) Constructor for TarArchiveOutputStream. -
Method Summary
Modifier and TypeMethodDescriptionprivate void
addPaxHeaderForBigNumber
(Map<String, String> paxHeaders, String header, long value, long maxValue) private void
addPaxHeadersForBigNumbers
(Map<String, String> paxHeaders, TarArchiveEntry entry) void
close()
Closes the underlying OutputStream.void
Close an entry.createArchiveEntry
(File inputFile, String entryName) Create an archive entry using the inputFile and entryName provided.createArchiveEntry
(Path inputPath, String entryName, LinkOption... options) Create an archive entry using the inputPath and entryName provided.private byte[]
encodeExtendedPaxHeadersContents
(Map<String, String> headers) private void
failForBigNumber
(String field, long value, long maxValue) private void
failForBigNumber
(String field, long value, long maxValue, String additionalMsg) private void
failForBigNumbers
(TarArchiveEntry entry) private void
failForBigNumberWithPosixMessage
(String field, long value, long maxValue) void
finish()
Ends the TAR archive without closing the underlying OutputStream.void
flush()
long
Returns the current number of bytes written to this stream.int
getCount()
Deprecated.int
Deprecated.private boolean
handleLongName
(TarArchiveEntry entry, String name, Map<String, String> paxHeaders, String paxHeaderName, byte linkType, String fieldName) Handles long file or link names according to the longFileMode setting.private void
void
putArchiveEntry
(ArchiveEntry archiveEntry) Put an entry on the output stream.void
setAddPaxHeadersForNonAsciiNames
(boolean b) Whether to add a PAX extension header for non-ASCII file names.void
setBigNumberMode
(int bigNumberMode) Set the big number mode.void
setLongFileMode
(int longFileMode) Set the long file mode.private boolean
shouldBeReplaced
(char c) private String
stripTo7Bits
(String name) private void
transferModTime
(TarArchiveEntry from, TarArchiveEntry to) void
write
(byte[] wBuf, int wOffset, int numToWrite) Writes bytes to the current tar archive entry.private void
Write an EOF (end of archive) record to the tar archive.(package private) void
writePaxHeaders
(TarArchiveEntry entry, String entryName, Map<String, String> headers) Writes a PAX extended header with the given map as contents.private void
writeRecord
(byte[] record) Write an archive record to the archive.Methods inherited from class org.apache.commons.compress.archivers.ArchiveOutputStream
canWriteEntryData, count, count, write
Methods inherited from class java.io.OutputStream
write
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Field Details
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LONGFILE_ERROR
public static final int LONGFILE_ERRORFail if a long file name is required in the archive.- See Also:
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LONGFILE_TRUNCATE
public static final int LONGFILE_TRUNCATELong paths will be truncated in the archive.- See Also:
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LONGFILE_GNU
public static final int LONGFILE_GNUGNU tar extensions are used to store long file names in the archive.- See Also:
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LONGFILE_POSIX
public static final int LONGFILE_POSIXPOSIX/PAX extensions are used to store long file names in the archive.- See Also:
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BIGNUMBER_ERROR
public static final int BIGNUMBER_ERRORFail if a big number (e.g. size > 8GiB) is required in the archive.- See Also:
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BIGNUMBER_STAR
public static final int BIGNUMBER_STARstar/GNU tar/BSD tar extensions are used to store big number in the archive.- See Also:
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BIGNUMBER_POSIX
public static final int BIGNUMBER_POSIXPOSIX/PAX extensions are used to store big numbers in the archive.- See Also:
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RECORD_SIZE
private static final int RECORD_SIZE- See Also:
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currSize
private long currSize -
currName
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currBytes
private long currBytes -
recordBuf
private final byte[] recordBuf -
longFileMode
private int longFileMode -
bigNumberMode
private int bigNumberMode -
recordsWritten
private int recordsWritten -
recordsPerBlock
private final int recordsPerBlock -
closed
private boolean closed -
haveUnclosedEntry
private boolean haveUnclosedEntryIndicates if putArchiveEntry has been called without closeArchiveEntry -
finished
private boolean finishedindicates if this archive is finished -
out
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countingOut
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zipEncoding
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encoding
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addPaxHeadersForNonAsciiNames
private boolean addPaxHeadersForNonAsciiNames -
ASCII
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BLOCK_SIZE_UNSPECIFIED
private static final int BLOCK_SIZE_UNSPECIFIED- See Also:
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Constructor Details
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TarArchiveOutputStream
Constructor for TarArchiveOutputStream.Uses a block size of 512 bytes.
- Parameters:
os
- the output stream to use
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TarArchiveOutputStream
Constructor for TarArchiveOutputStream.Uses a block size of 512 bytes.
- Parameters:
os
- the output stream to useencoding
- name of the encoding to use for file names- Since:
- 1.4
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TarArchiveOutputStream
Constructor for TarArchiveOutputStream.- Parameters:
os
- the output stream to useblockSize
- the block size to use. Must be a multiple of 512 bytes.
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TarArchiveOutputStream
Deprecated.recordSize must always be 512 bytes. An IllegalArgumentException will be thrown if any other value is usedConstructor for TarArchiveOutputStream.- Parameters:
os
- the output stream to useblockSize
- the block size to userecordSize
- the record size to use. Must be 512 bytes.
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TarArchiveOutputStream
@Deprecated public TarArchiveOutputStream(OutputStream os, int blockSize, int recordSize, String encoding) Deprecated.recordSize must always be 512 bytes. An IllegalArgumentException will be thrown if any other value is used.Constructor for TarArchiveOutputStream.- Parameters:
os
- the output stream to useblockSize
- the block size to use . Must be a multiple of 512 bytes.recordSize
- the record size to use. Must be 512 bytes.encoding
- name of the encoding to use for file names- Since:
- 1.4
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TarArchiveOutputStream
Constructor for TarArchiveOutputStream.- Parameters:
os
- the output stream to useblockSize
- the block size to use. Must be a multiple of 512 bytes.encoding
- name of the encoding to use for file names- Since:
- 1.4
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Method Details
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setLongFileMode
public void setLongFileMode(int longFileMode) Set the long file mode. This can be LONGFILE_ERROR(0), LONGFILE_TRUNCATE(1) or LONGFILE_GNU(2). This specifies the treatment of long file names (names >= TarConstants.NAMELEN). Default is LONGFILE_ERROR.- Parameters:
longFileMode
- the mode to use
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setBigNumberMode
public void setBigNumberMode(int bigNumberMode) Set the big number mode. This can be BIGNUMBER_ERROR(0), BIGNUMBER_POSIX(1) or BIGNUMBER_STAR(2). This specifies the treatment of big files (sizes > TarConstants.MAXSIZE) and other numeric values to big to fit into a traditional tar header. Default is BIGNUMBER_ERROR.- Parameters:
bigNumberMode
- the mode to use- Since:
- 1.4
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setAddPaxHeadersForNonAsciiNames
public void setAddPaxHeadersForNonAsciiNames(boolean b) Whether to add a PAX extension header for non-ASCII file names.- Parameters:
b
- whether to add a PAX extension header for non-ASCII file names.- Since:
- 1.4
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getCount
Deprecated.Description copied from class:ArchiveOutputStream
Returns the current number of bytes written to this stream.- Overrides:
getCount
in classArchiveOutputStream
- Returns:
- the number of written bytes
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getBytesWritten
public long getBytesWritten()Description copied from class:ArchiveOutputStream
Returns the current number of bytes written to this stream.- Overrides:
getBytesWritten
in classArchiveOutputStream
- Returns:
- the number of written bytes
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finish
Ends the TAR archive without closing the underlying OutputStream. An archive consists of a series of file entries terminated by an end-of-archive entry, which consists of two 512 blocks of zero bytes. POSIX.1 requires two EOF records, like some other implementations.- Specified by:
finish
in classArchiveOutputStream
- Throws:
IOException
- on error
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close
Closes the underlying OutputStream.- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Overrides:
close
in classOutputStream
- Throws:
IOException
- on error
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getRecordSize
Deprecated.Get the record size being used by this stream's TarBuffer.- Returns:
- The TarBuffer record size.
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putArchiveEntry
Put an entry on the output stream. This writes the entry's header record and positions the output stream for writing the contents of the entry. Once this method is called, the stream is ready for calls to write() to write the entry's contents. Once the contents are written, closeArchiveEntry() MUST be called to ensure that all buffered data is completely written to the output stream.- Specified by:
putArchiveEntry
in classArchiveOutputStream
- Parameters:
archiveEntry
- The TarEntry to be written to the archive.- Throws:
IOException
- on errorClassCastException
- if archiveEntry is not an instance of TarArchiveEntryIllegalArgumentException
- if thelongFileMode
equalsLONGFILE_ERROR
and the file name is too longIllegalArgumentException
- if thebigNumberMode
equalsBIGNUMBER_ERROR
and one of the numeric values exceeds the limits of a traditional tar header.
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closeArchiveEntry
Close an entry. This method MUST be called for all file entries that contain data. The reason is that we must buffer data written to the stream in order to satisfy the buffer's record based writes. Thus, there may be data fragments still being assembled that must be written to the output stream before this entry is closed and the next entry written.- Specified by:
closeArchiveEntry
in classArchiveOutputStream
- Throws:
IOException
- on error
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write
Writes bytes to the current tar archive entry. This method is aware of the current entry and will throw an exception if you attempt to write bytes past the length specified for the current entry.- Overrides:
write
in classOutputStream
- Parameters:
wBuf
- The buffer to write to the archive.wOffset
- The offset in the buffer from which to get bytes.numToWrite
- The number of bytes to write.- Throws:
IOException
- on error
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writePaxHeaders
void writePaxHeaders(TarArchiveEntry entry, String entryName, Map<String, String> headers) throws IOExceptionWrites a PAX extended header with the given map as contents.- Throws:
IOException
- Since:
- 1.4
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encodeExtendedPaxHeadersContents
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stripTo7Bits
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shouldBeReplaced
private boolean shouldBeReplaced(char c) - Returns:
- true if the character could lead to problems when used inside a TarArchiveEntry name for a PAX header.
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writeEOFRecord
Write an EOF (end of archive) record to the tar archive. An EOF record consists of a record of all zeros.- Throws:
IOException
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flush
- Specified by:
flush
in interfaceFlushable
- Overrides:
flush
in classOutputStream
- Throws:
IOException
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createArchiveEntry
Description copied from class:ArchiveOutputStream
Create an archive entry using the inputFile and entryName provided.- Specified by:
createArchiveEntry
in classArchiveOutputStream
- Parameters:
inputFile
- the file to create the entry fromentryName
- name to use for the entry- Returns:
- the ArchiveEntry set up with details from the file
- Throws:
IOException
- if an I/O error occurs
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createArchiveEntry
public ArchiveEntry createArchiveEntry(Path inputPath, String entryName, LinkOption... options) throws IOException Description copied from class:ArchiveOutputStream
Create an archive entry using the inputPath and entryName provided. The default implementation calls simply delegates as:return createArchiveEntry(inputFile.toFile(), entryName);
Subclasses should override this method.- Overrides:
createArchiveEntry
in classArchiveOutputStream
- Parameters:
inputPath
- the file to create the entry fromentryName
- name to use for the entryoptions
- options indicating how symbolic links are handled.- Returns:
- the ArchiveEntry set up with details from the file
- Throws:
IOException
- if an I/O error occurs
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writeRecord
Write an archive record to the archive.- Parameters:
record
- The record data to write to the archive.- Throws:
IOException
- on error
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padAsNeeded
- Throws:
IOException
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addPaxHeadersForBigNumbers
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addPaxHeaderForBigNumber
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failForBigNumbers
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failForBigNumber
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failForBigNumberWithPosixMessage
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failForBigNumber
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handleLongName
private boolean handleLongName(TarArchiveEntry entry, String name, Map<String, String> paxHeaders, String paxHeaderName, byte linkType, String fieldName) throws IOExceptionHandles long file or link names according to the longFileMode setting.I.e. if the given name is too long to be written to a plain tar header then
- it creates a pax header who's name is given by the paxHeaderName parameter if longFileMode is POSIX
- it creates a GNU longlink entry who's type is given by the linkType parameter if longFileMode is GNU
- it throws an exception if longFileMode is ERROR
- it truncates the name if longFileMode is TRUNCATE
- Parameters:
entry
- entry the name belongs toname
- the name to writepaxHeaders
- current map of pax headerspaxHeaderName
- name of the pax header to writelinkType
- type of the GNU entry to writefieldName
- the name of the field- Returns:
- whether a pax header has been written.
- Throws:
IllegalArgumentException
- if thelongFileMode
equalsLONGFILE_ERROR
and the file name is too longIOException
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transferModTime
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