java.util.zip
Class GZIPInputStream

java.lang.Object   
  java.io.InputStream   
      java.io.FilterInputStream   
          java.util.zip.InflaterInputStream   
              java.util.zip.GZIPInputStream

All Implemented Interfaces:

Closeable

public class GZIPInputStream
extends InflaterInputStream   

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

See Also:

InflaterInputStream

Field Summary

protected CRC32	crc CRC-32 for uncompressed data.
protected boolean	eos Indicates end of input stream.
static int	GZIP_MAGIC GZIP header magic number.

Fields inherited from class java.util.zip.InflaterInputStream

buf , inf , len

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

GZIPInputStream (InputStream in)
Creates a new input stream with a default buffer size.

GZIPInputStream (InputStream in, int size)
Creates a new input stream with the specified buffer size.

Method Summary

void	close () Closes this input stream and releases any system resources associated with the stream.
int	read (byte[] buf, int off, int len) Reads uncompressed data into an array of bytes.

Methods inherited from class java.util.zip.InflaterInputStream

available , fill , mark , markSupported , read , reset , skip

Methods inherited from class java.io.FilterInputStream

read

Methods inherited from class java.lang.Object

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

Field Detail

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.

See Also:

Constant Field Values

Constructor Detail

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:

IOException - if an I/O error has occurred

IllegalArgumentException - if size is <= 0

GZIPInputStream

public GZIPInputStream(InputStream    in)
                throws IOException   

Creates a new input stream with a default buffer size.

Parameters:

in - the input stream

Throws:

IOException - if an I/O error has occurred

Method Detail

read

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

Reads uncompressed data into an array of bytes. Blocks until enough input is available for decompression.

Overrides:

read in class InflaterInputStream

Parameters:

buf - the buffer into which the data is read

off - the start offset of the data

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:

IOException - if an I/O error has occurred or the compressed input data is corrupt

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

Overrides:

close in class InflaterInputStream

Throws:

IOException - if an I/O error has occurred

See Also:

FilterInputStream.in