Class TarArchiveOutputStream
- java.lang.Object
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- java.io.OutputStream
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- org.apache.commons.compress.archivers.ArchiveOutputStream
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- org.apache.commons.compress.archivers.tar.TarArchiveOutputStream
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- All Implemented Interfaces:
java.io.Closeable
,java.io.Flushable
,java.lang.AutoCloseable
public class TarArchiveOutputStream extends ArchiveOutputStream
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
Fields Modifier and Type Field Description private boolean
addPaxHeadersForNonAsciiNames
private static ZipEncoding
ASCII
static int
BIGNUMBER_ERROR
Fail if a big number (e.g.static int
BIGNUMBER_POSIX
POSIX/PAX extensions are used to store big numbers in the archive.static int
BIGNUMBER_STAR
star/GNU tar/BSD tar extensions are used to store big number in the archive.private int
bigNumberMode
private static int
BLOCK_SIZE_UNSPECIFIED
private boolean
closed
private CountingOutputStream
countingOut
private long
currBytes
private java.lang.String
currName
private long
currSize
(package private) java.lang.String
encoding
private boolean
finished
indicates if this archive is finishedprivate boolean
haveUnclosedEntry
Indicates if putArchiveEntry has been called without closeArchiveEntrystatic int
LONGFILE_ERROR
Fail if a long file name is required in the archive.static int
LONGFILE_GNU
GNU tar extensions are used to store long file names in the archive.static int
LONGFILE_POSIX
POSIX/PAX extensions are used to store long file names in the archive.static int
LONGFILE_TRUNCATE
Long paths will be truncated in the archive.private int
longFileMode
private FixedLengthBlockOutputStream
out
private static int
RECORD_SIZE
private byte[]
recordBuf
private int
recordsPerBlock
private int
recordsWritten
private ZipEncoding
zipEncoding
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Constructor Summary
Constructors Constructor Description TarArchiveOutputStream(java.io.OutputStream os)
Constructor for TarArchiveOutputStream.TarArchiveOutputStream(java.io.OutputStream os, int blockSize)
Constructor for TarArchiveOutputStream.TarArchiveOutputStream(java.io.OutputStream os, int blockSize, int recordSize)
Deprecated.recordSize must always be 512 bytes.TarArchiveOutputStream(java.io.OutputStream os, int blockSize, int recordSize, java.lang.String encoding)
Deprecated.recordSize must always be 512 bytes.TarArchiveOutputStream(java.io.OutputStream os, int blockSize, java.lang.String encoding)
Constructor for TarArchiveOutputStream.TarArchiveOutputStream(java.io.OutputStream os, java.lang.String encoding)
Constructor for TarArchiveOutputStream.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description private void
addPaxHeaderForBigNumber(java.util.Map<java.lang.String,java.lang.String> paxHeaders, java.lang.String header, long value, long maxValue)
private void
addPaxHeadersForBigNumbers(java.util.Map<java.lang.String,java.lang.String> paxHeaders, TarArchiveEntry entry)
void
close()
Closes the underlying OutputStream.void
closeArchiveEntry()
Close an entry.ArchiveEntry
createArchiveEntry(java.io.File inputFile, java.lang.String entryName)
Create an archive entry using the inputFile and entryName provided.private byte[]
encodeExtendedPaxHeadersContents(java.util.Map<java.lang.String,java.lang.String> headers)
private void
failForBigNumber(java.lang.String field, long value, long maxValue)
private void
failForBigNumber(java.lang.String field, long value, long maxValue, java.lang.String additionalMsg)
private void
failForBigNumbers(TarArchiveEntry entry)
private void
failForBigNumberWithPosixMessage(java.lang.String field, long value, long maxValue)
void
finish()
Ends the TAR archive without closing the underlying OutputStream.void
flush()
long
getBytesWritten()
Returns the current number of bytes written to this stream.int
getCount()
Deprecated.int
getRecordSize()
Deprecated.private boolean
handleLongName(TarArchiveEntry entry, java.lang.String name, java.util.Map<java.lang.String,java.lang.String> paxHeaders, java.lang.String paxHeaderName, byte linkType, java.lang.String fieldName)
Handles long file or link names according to the longFileMode setting.private void
padAsNeeded()
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 java.lang.String
stripTo7Bits(java.lang.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
writeEOFRecord()
Write an EOF (end of archive) record to the tar archive.(package private) void
writePaxHeaders(TarArchiveEntry entry, java.lang.String entryName, java.util.Map<java.lang.String,java.lang.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
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Field Detail
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LONGFILE_ERROR
public static final int LONGFILE_ERROR
Fail if a long file name is required in the archive.- See Also:
- Constant Field Values
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LONGFILE_TRUNCATE
public static final int LONGFILE_TRUNCATE
Long paths will be truncated in the archive.- See Also:
- Constant Field Values
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LONGFILE_GNU
public static final int LONGFILE_GNU
GNU tar extensions are used to store long file names in the archive.- See Also:
- Constant Field Values
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LONGFILE_POSIX
public static final int LONGFILE_POSIX
POSIX/PAX extensions are used to store long file names in the archive.- See Also:
- Constant Field Values
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BIGNUMBER_ERROR
public static final int BIGNUMBER_ERROR
Fail if a big number (e.g. size > 8GiB) is required in the archive.- See Also:
- Constant Field Values
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BIGNUMBER_STAR
public static final int BIGNUMBER_STAR
star/GNU tar/BSD tar extensions are used to store big number in the archive.- See Also:
- Constant Field Values
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BIGNUMBER_POSIX
public static final int BIGNUMBER_POSIX
POSIX/PAX extensions are used to store big numbers in the archive.- See Also:
- Constant Field Values
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RECORD_SIZE
private static final int RECORD_SIZE
- See Also:
- Constant Field Values
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currSize
private long currSize
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currName
private java.lang.String currName
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currBytes
private long currBytes
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recordBuf
private final byte[] recordBuf
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longFileMode
private int longFileMode
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bigNumberMode
private int bigNumberMode
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recordsWritten
private int recordsWritten
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recordsPerBlock
private final int recordsPerBlock
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closed
private boolean closed
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haveUnclosedEntry
private boolean haveUnclosedEntry
Indicates if putArchiveEntry has been called without closeArchiveEntry
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finished
private boolean finished
indicates if this archive is finished
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out
private final FixedLengthBlockOutputStream out
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countingOut
private final CountingOutputStream countingOut
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zipEncoding
private final ZipEncoding zipEncoding
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encoding
final java.lang.String encoding
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addPaxHeadersForNonAsciiNames
private boolean addPaxHeadersForNonAsciiNames
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ASCII
private static final ZipEncoding ASCII
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BLOCK_SIZE_UNSPECIFIED
private static final int BLOCK_SIZE_UNSPECIFIED
- See Also:
- Constant Field Values
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Constructor Detail
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TarArchiveOutputStream
public TarArchiveOutputStream(java.io.OutputStream os)
Constructor for TarArchiveOutputStream.Uses a block size of 512 bytes.
- Parameters:
os
- the output stream to use
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TarArchiveOutputStream
public TarArchiveOutputStream(java.io.OutputStream os, java.lang.String encoding)
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
public TarArchiveOutputStream(java.io.OutputStream os, int blockSize)
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 public TarArchiveOutputStream(java.io.OutputStream os, int blockSize, int recordSize)
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(java.io.OutputStream os, int blockSize, int recordSize, java.lang.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
public TarArchiveOutputStream(java.io.OutputStream os, int blockSize, java.lang.String encoding)
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 Detail
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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 public int 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
public void finish() throws java.io.IOException
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:
java.io.IOException
- on error
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close
public void close() throws java.io.IOException
Closes the underlying OutputStream.- Specified by:
close
in interfacejava.lang.AutoCloseable
- Specified by:
close
in interfacejava.io.Closeable
- Overrides:
close
in classjava.io.OutputStream
- Throws:
java.io.IOException
- on error
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getRecordSize
@Deprecated public int getRecordSize()
Deprecated.Get the record size being used by this stream's TarBuffer.- Returns:
- The TarBuffer record size.
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putArchiveEntry
public void putArchiveEntry(ArchiveEntry archiveEntry) throws java.io.IOException
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:
java.io.IOException
- on errorjava.lang.ClassCastException
- if archiveEntry is not an instance of TarArchiveEntry
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closeArchiveEntry
public void closeArchiveEntry() throws java.io.IOException
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:
java.io.IOException
- on error
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write
public void write(byte[] wBuf, int wOffset, int numToWrite) throws java.io.IOException
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 classjava.io.OutputStream
- 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:
java.io.IOException
- on error
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writePaxHeaders
void writePaxHeaders(TarArchiveEntry entry, java.lang.String entryName, java.util.Map<java.lang.String,java.lang.String> headers) throws java.io.IOException
Writes a PAX extended header with the given map as contents.- Throws:
java.io.IOException
- Since:
- 1.4
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encodeExtendedPaxHeadersContents
private byte[] encodeExtendedPaxHeadersContents(java.util.Map<java.lang.String,java.lang.String> headers) throws java.io.UnsupportedEncodingException
- Throws:
java.io.UnsupportedEncodingException
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stripTo7Bits
private java.lang.String stripTo7Bits(java.lang.String name)
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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
private void writeEOFRecord() throws java.io.IOException
Write an EOF (end of archive) record to the tar archive. An EOF record consists of a record of all zeros.- Throws:
java.io.IOException
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flush
public void flush() throws java.io.IOException
- Specified by:
flush
in interfacejava.io.Flushable
- Overrides:
flush
in classjava.io.OutputStream
- Throws:
java.io.IOException
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createArchiveEntry
public ArchiveEntry createArchiveEntry(java.io.File inputFile, java.lang.String entryName) throws java.io.IOException
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:
java.io.IOException
- if an I/O error occurs
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writeRecord
private void writeRecord(byte[] record) throws java.io.IOException
Write an archive record to the archive.- Parameters:
record
- The record data to write to the archive.- Throws:
java.io.IOException
- on error
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padAsNeeded
private void padAsNeeded() throws java.io.IOException
- Throws:
java.io.IOException
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addPaxHeadersForBigNumbers
private void addPaxHeadersForBigNumbers(java.util.Map<java.lang.String,java.lang.String> paxHeaders, TarArchiveEntry entry)
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addPaxHeaderForBigNumber
private void addPaxHeaderForBigNumber(java.util.Map<java.lang.String,java.lang.String> paxHeaders, java.lang.String header, long value, long maxValue)
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failForBigNumbers
private void failForBigNumbers(TarArchiveEntry entry)
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failForBigNumber
private void failForBigNumber(java.lang.String field, long value, long maxValue)
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failForBigNumberWithPosixMessage
private void failForBigNumberWithPosixMessage(java.lang.String field, long value, long maxValue)
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failForBigNumber
private void failForBigNumber(java.lang.String field, long value, long maxValue, java.lang.String additionalMsg)
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handleLongName
private boolean handleLongName(TarArchiveEntry entry, java.lang.String name, java.util.Map<java.lang.String,java.lang.String> paxHeaders, java.lang.String paxHeaderName, byte linkType, java.lang.String fieldName) throws java.io.IOException
Handles 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:
java.io.IOException
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transferModTime
private void transferModTime(TarArchiveEntry from, TarArchiveEntry to)
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