java.util.zip
Class InflaterInputStream

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

All Implemented Interfaces:

Closeable

Direct Known Subclasses:

GZIPInputStream, ZipInputStream

public class InflaterInputStream
extends FilterInputStream

InflaterOutputStream read data which has been compressed using the DEFLATE compression method.

See Also:

Inflater, DeflaterOutputStream

Field Summary

protected byte[]	buf
(package private) static int	BUF_SIZE
(package private) boolean	closed
(package private) boolean	eof
protected Inflater	inf
protected int	len
(package private) int	nativeEndBufSize

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

InflaterInputStream(InputStream is)
Constructs a new InflaterOutputStream on is

InflaterInputStream(InputStream is, Inflater inf)
Constructs a new InflaterOutputStream on is, using the Inflater provided in inf.

InflaterInputStream(InputStream is, Inflater inf, int bsize)
Constructs a new InflaterOutputStream on is, using the Inflater provided in inf.

Method Summary

int	available() Returns 0 if this stream has been closed, 1 otherwise.
void	close() Closes the stream
protected void	fill()
void	mark(int readlimit) Marks the current position in the stream.
boolean	markSupported() Returns whether the receiver implements mark semantics.
int	read() Reads a single byte of decompressed data.
int	read(byte[] buffer, int off, int nbytes) Reads up to nbytes of decompressed data and stores it in buf starting at off.
void	reset() Reset the position of the stream to the last mark position.
long	skip(long nbytes) Skips up to nbytes of uncompressed data.

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

inf

protected Inflater inf

buf

protected byte[] buf

len

protected int len

closed

boolean closed

eof

boolean eof

BUF_SIZE

static final int BUF_SIZE

See Also:

Constant Field Values

nativeEndBufSize

int nativeEndBufSize

Constructor Detail

InflaterInputStream

public InflaterInputStream(InputStream is)

Constructs a new InflaterOutputStream on is

Parameters:

is - The InputStream to read data from

InflaterInputStream

public InflaterInputStream(InputStream is,
                           Inflater inf)

Constructs a new InflaterOutputStream on is, using the Inflater provided in inf.

Parameters:

is - The InputStream to read data from

inf - The Inflater to use for decompression

InflaterInputStream

public InflaterInputStream(InputStream is,
                           Inflater inf,
                           int bsize)

Constructs a new InflaterOutputStream on is, using the Inflater provided in inf. The size of the inflation buffer is determined by bsize.

Parameters:

is - The InputStream to read data from

inf - The Inflater to use for decompression

bsize - size of the inflation buffer

Method Detail

read

public int read()
         throws IOException

Reads a single byte of decompressed data.

Overrides:

read in class FilterInputStream

Returns:

byte read

Throws:

IOException - If an error occurs reading

read

public int read(byte[] buffer,
                int off,
                int nbytes)
         throws IOException

Reads up to nbytes of decompressed data and stores it in buf starting at off.

Overrides:

read in class FilterInputStream

Parameters:

buffer - Buffer to store into

off - offset in buffer to store at

nbytes - number of bytes to store

Returns:

Number of uncompressed bytes read

Throws:

IOException - If an error occurs reading

fill

protected void fill()
             throws IOException

Throws:

IOException

skip

public long skip(long nbytes)
          throws IOException

Skips up to nbytes of uncompressed data.

Overrides:

skip in class FilterInputStream

Parameters:

nbytes - Number of bytes to skip

Returns:

Number of uncompressed bytes skipped

Throws:

IOException - If an error occurs skipping

available

public int available()
              throws IOException

Returns 0 if this stream has been closed, 1 otherwise.

Overrides:

available in class FilterInputStream

Returns:

the number of bytes available before blocking.

Throws:

IOException - If an error occurs

close

public void close()
           throws IOException

Closes the stream

Specified by:

close in interface Closeable

Overrides:

close in class FilterInputStream

Throws:

IOException - If an error occurs closing the stream

mark

public void mark(int readlimit)

Marks the current position in the stream. This implementation overrides the supertype implementation to do nothing at all.

Overrides:

mark in class FilterInputStream

Parameters:

readlimit - of no use

reset

public void reset()
           throws IOException

Reset the position of the stream to the last mark position. This implementation overrides the supertype implementation and always throws an IOException when called.

Overrides:

reset in class FilterInputStream

Throws:

IOException - if the method is called

markSupported

public boolean markSupported()

Returns whether the receiver implements mark semantics. This type does not support mark, so always responds false.

Overrides:

markSupported in class FilterInputStream

Returns:

false