Package org.apache.commons.compress.compressors.xz

Class XZCompressorInputStream

java.lang.Object

java.io.InputStream

org.apache.commons.compress.compressors.CompressorInputStream

org.apache.commons.compress.compressors.xz.XZCompressorInputStream

All Implemented Interfaces:

Closeable, AutoCloseable, InputStreamStatistics

public class XZCompressorInputStream
extends CompressorInputStream
implements InputStreamStatistics

XZ decompressor.

Since:

1.4

Constructor Summary

Constructors

Constructor	Description
XZCompressorInputStream(InputStream inputStream)	Creates a new input stream that decompresses XZ-compressed data from the specified input stream.
XZCompressorInputStream(InputStream inputStream, boolean decompressConcatenated)	Creates a new input stream that decompresses XZ-compressed data from the specified input stream.
XZCompressorInputStream(InputStream inputStream, boolean decompressConcatenated, int memoryLimitInKb)	Creates a new input stream that decompresses XZ-compressed data from the specified input stream.

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
long	getCompressedCount()
static boolean	matches(byte[] signature, int length)	Checks if the signature matches what is expected for a .xz file.
int	read()
int	read(byte[] buf, int off, int len)
long	skip(long n)

Methods inherited from class org.apache.commons.compress.compressors.CompressorInputStream

getBytesRead, getCount, getUncompressedCount

Methods inherited from class java.io.InputStream

mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, transferTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.compress.utils.InputStreamStatistics

getUncompressedCount

Constructor Detail

XZCompressorInputStream

public XZCompressorInputStream(InputStream inputStream)
                        throws IOException

Creates a new input stream that decompresses XZ-compressed data from the specified input stream. This doesn't support concatenated .xz files.

Parameters:

inputStream - where to read the compressed data

Throws:

IOException - if the input is not in the .xz format, the input is corrupt or truncated, the .xz headers specify options that are not supported by this implementation, or the underlying inputStream throws an exception

XZCompressorInputStream

public XZCompressorInputStream(InputStream inputStream,
                               boolean decompressConcatenated)
                        throws IOException

Creates a new input stream that decompresses XZ-compressed data from the specified input stream.

Parameters:

inputStream - where to read the compressed data

decompressConcatenated - if true, decompress until the end of the input; if false, stop after the first .xz stream and leave the input position to point to the next byte after the .xz stream

Throws:

IOException - if the input is not in the .xz format, the input is corrupt or truncated, the .xz headers specify options that are not supported by this implementation, or the underlying inputStream throws an exception

XZCompressorInputStream

public XZCompressorInputStream(InputStream inputStream,
                               boolean decompressConcatenated,
                               int memoryLimitInKb)
                        throws IOException

Creates a new input stream that decompresses XZ-compressed data from the specified input stream.

Parameters:

inputStream - where to read the compressed data

decompressConcatenated - if true, decompress until the end of the input; if false, stop after the first .xz stream and leave the input position to point to the next byte after the .xz stream

memoryLimitInKb - memory limit used when reading blocks. If the estimated memory limit is exceeded on read(), a MemoryLimitException is thrown.

Throws:

IOException - if the input is not in the .xz format, the input is corrupt or truncated, the .xz headers specify options that are not supported by this implementation, or the underlying inputStream throws an exception

Since:

1.14

Method Detail

matches

public static boolean matches(byte[] signature,
                              int length)

Checks if the signature matches what is expected for a .xz file.

Parameters:

signature - the bytes to check

length - the number of bytes to check

Returns:

true if signature matches the .xz magic bytes, false otherwise

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] buf,
                int off,
                int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

getCompressedCount

public long getCompressedCount()

Specified by:

getCompressedCount in interface InputStreamStatistics

Returns:

the amount of raw or compressed bytes read by the stream

Since:

1.17