com.sun.jimi.util.zip
Class InflaterInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--java.io.FilterInputStream
              |
              +--com.sun.jimi.util.zip.InflaterInputStream

public class InflaterInputStream

extends java.io.FilterInputStream

This class implements a stream filter for uncompressing data in the "deflate" compression format. It is also used as the basis for other decompression filters, such as GZIPInputStream.

See Also:

Inflater

Field Summary

protected byte[]	buf Input buffer for decompression.
protected Inflater	inf Decompressor for this stream.
protected int	len Length of input buffer.

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

InflaterInputStream(java.io.InputStream in)
Creates a new input stream with a default decompressor and buffer size.

InflaterInputStream(java.io.InputStream in, Inflater inf)
Creates a new input stream with the specified decompressor and a default buffer size.

InflaterInputStream(java.io.InputStream in, Inflater inf, int size)
Creates a new input stream with the specified decompressor and buffer size.

Method Summary

protected void	fill() Fills input buffer with more data to decompress.
int	read() Reads a byte of uncompressed data.
int	read(byte[] b, int off, int len) Reads uncompressed data into an array of bytes.
long	skip(long n) Skips specified number of bytes of uncompressed data.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, reset

Methods inherited from class java.lang.Object

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

Field Detail

inf

protected Inflater inf

Decompressor for this stream.

buf

protected byte[] buf

Input buffer for decompression.

len

protected int len

Length of input buffer.

Constructor Detail

InflaterInputStream

public InflaterInputStream(java.io.InputStream in,
                           Inflater inf,
                           int size)

Creates a new input stream with the specified decompressor and buffer size.

Parameters:

in - the input stream

inf - the decompressor ("inflater")

size - the input buffer size

InflaterInputStream

public InflaterInputStream(java.io.InputStream in,
                           Inflater inf)

Creates a new input stream with the specified decompressor and a default buffer size.

Parameters:

in - the input stream

inf - the decompressor ("inflater")

InflaterInputStream

public InflaterInputStream(java.io.InputStream in)

Creates a new input stream with a default decompressor and buffer size.

Method Detail

read

public int read()
         throws java.io.IOException

Reads a byte of uncompressed data. This method will block until enough input is available for decompression.

Returns:

the byte read, or -1 if end of compressed input is reached

Throws:

java.io.IOException - if an I/O error has occurred

Overrides:

read in class java.io.FilterInputStream

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Reads uncompressed data into an array of bytes. This method will block until some input can be decompressed.

Parameters:

b - 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 is reached or a preset dictionary is needed

Throws:

DataFormatException - if a ZIP format error has occurred

java.io.IOException - if an I/O error has occurred

Overrides:

read in class java.io.FilterInputStream

skip

public long skip(long n)
          throws java.io.IOException

Skips specified number of bytes of uncompressed data.

Parameters:

n - the number of bytes to skip

Returns:

the actual number of bytes skipped.

Throws:

java.io.IOException - if an I/O error has occurred

Overrides:

skip in class java.io.FilterInputStream

fill

protected void fill()
             throws java.io.IOException

Fills input buffer with more data to decompress.

Throws:

java.io.IOException - if an I/O error has occurred