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Class GZIPInputStream

All Implemented Interfaces:
Closeable, AutoCloseable
public class GZIPInputStream
extends InflaterInputStream

This class implements a stream filter for reading compressed data in the GZIP file format.

See Also:
InflaterInputStream

Fields

crc

protected CRC32 crc

CRC-32 for uncompressed data.

eos

protected boolean eos

Indicates end of input stream.

GZIP_MAGIC

public static final int GZIP_MAGIC

GZIP header magic number.

Constructors

GZIPInputStream

public GZIPInputStream(InputStream in,
                       int size)
                throws IOException

Creates a new input stream with the specified buffer size.

Parameters:
in - the input stream
size - the input buffer size
Throws:
ZipException - if a GZIP format error has occurred or the compression method used is unsupported
IOException - if an I/O error has occurred
IllegalArgumentException - if size <= 0

GZIPInputStream

public GZIPInputStream(InputStream in)
                throws IOException

Creates a new input stream with a default buffer size.

Parameters:
in - the input stream
Throws:
ZipException - if a GZIP format error has occurred or the compression method used is unsupported
IOException - if an I/O error has occurred

Methods

read

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

Reads uncompressed data into an array of bytes. If len is not zero, the method will block until some input can be decompressed; otherwise, no bytes are read and 0 is returned.

Overrides:
read in class InflaterInputStream
Parameters:
buf - the buffer into which the data is read
off - the start offset in the destination array b
len - the maximum number of bytes read
Returns:
the actual number of bytes read, or -1 if the end of the compressed input stream is reached
Throws:
NullPointerException - If buf is null.
IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than buf.length - off
ZipException - if the compressed input data is corrupt.
IOException - if an I/O error has occurred.
See Also:
FilterInputStream.in

close

public void close()
           throws IOException

Closes this input stream and releases any system resources associated with the stream.

Specified by:
close in interface Closeable
Specified by:
close in interface AutoCloseable
Overrides:
close in class InflaterInputStream
Throws:
IOException - if an I/O error has occurred
See Also:
FilterInputStream.in

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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