net.sf.zipme
Class InflaterInputStream

java.lang.Object
  java.io.InputStream
      net.sf.zipme.InflaterInputStream

Direct Known Subclasses:

GZIPInputStream, ZipInputStream

public class InflaterInputStream

extends java.io.InputStream

This filter stream is used to decompress data compressed in the "deflate" format. The "deflate" format is described in RFC 1951. This stream may form the basis for other decompression filters, such as the GZIPInputStream.

Since:

1.1

Field Summary

protected byte[]	buf Byte array used as a buffer
protected java.io.InputStream	in This is the subordinate InputStream to which method calls are redirected
protected Inflater	inf Decompressor for this filter
protected int	len Size of buffer

Constructor Summary

InflaterInputStream(java.io.InputStream in)
Create an InflaterInputStream with the default decompresseor and a default buffer size.

InflaterInputStream(java.io.InputStream in, Inflater inf)
Create an InflaterInputStream with the specified decompresseor and a default buffer size.

InflaterInputStream(java.io.InputStream in, Inflater inf, int size)
Create an InflaterInputStream with the specified decompresseor and a specified buffer size.

Method Summary

int	available() Returns 0 once the end of the stream (EOF) has been reached.
void	close() Closes the input stream
protected void	fill() Fills the buffer with more data to decompress.
void	mark(int readLimit)
boolean	markSupported()
int	read() Reads one byte of decompressed data.
int	read(byte[] buf) Calls the read(byte[], int, int) overloaded method.
int	read(byte[] b, int off, int len) Decompresses data into the byte array
void	reset()
long	skip(long n) Skip specified number of bytes of uncompressed data

Methods inherited from class java.lang.Object

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

Field Detail

in

protected java.io.InputStream in

This is the subordinate InputStream to which method calls are redirected

inf

protected Inflater inf

Decompressor for this filter

buf

protected byte[] buf

Byte array used as a buffer

len

protected int len

Size of buffer

Constructor Detail

InflaterInputStream

public InflaterInputStream(java.io.InputStream in)

Create an InflaterInputStream with the default decompresseor and a default buffer size.

Parameters:

in - the InputStream to read bytes from

InflaterInputStream

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

Create an InflaterInputStream with the specified decompresseor and a default buffer size.

Parameters:

in - the InputStream to read bytes from

inf - the decompressor used to decompress data read from in

InflaterInputStream

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

Create an InflaterInputStream with the specified decompresseor and a specified buffer size.

Parameters:

in - the InputStream to read bytes from

inf - the decompressor used to decompress data read from in

size - size of the buffer to use

Method Detail

available

public int available()
              throws java.io.IOException

Returns 0 once the end of the stream (EOF) has been reached. Otherwise returns 1.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Closes the input stream

Throws:

java.io.IOException

fill

protected void fill()
             throws java.io.IOException

Fills the buffer with more data to decompress.

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Reads one byte of decompressed data. The byte is in the lower 8 bits of the int.

Throws:

java.io.IOException

read

public int read(byte[] buf)
         throws java.io.IOException

Calls the read(byte[], int, int) overloaded method. Note that this method does not redirect its call directly to a corresponding method in in. This allows subclasses to override only the three argument version of read.

Parameters:

buf - The buffer to read bytes into

Returns:

The value retured from in.read(byte[], int, int)

Throws:

java.io.IOException - If an error occurs

read

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

Decompresses data into the byte array

Parameters:

b - the array to read and decompress data into

off - the offset indicating where the data should be placed

len - the number of bytes to decompress

Throws:

java.io.IOException

skip

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

Skip specified number of bytes of uncompressed data

Parameters:

n - number of bytes to skip

Throws:

java.io.IOException

markSupported

public boolean markSupported()

mark

public void mark(int readLimit)

reset

public void reset()
           throws java.io.IOException

Throws:

java.io.IOException