IT. Expert System.

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

GZIPInputStream, ZipInputStream

public class InflaterInputStream
extends FilterInputStream

See Also:

Inflater, DeflaterOutputStream

• Field Summary

  Fields

  Modifier and Type	Field and Description
  protected byte[]	buf The input buffer used for decompression.
  protected Inflater	inf The inflater used for this stream.
  protected int	len The length of the buffer.

  • Fields inherited from class java.io.FilterInputStream

    in

• Constructor Summary

  Constructors

  Constructor and Description
  InflaterInputStream(InputStream is) This is the most basic constructor.
  InflaterInputStream(InputStream is, Inflater inflater) This constructor lets you pass a specifically initialized Inflater, for example one that expects no ZLIB header.
  InflaterInputStream(InputStream is, Inflater inflater, int bsize) This constructor lets you specify both the Inflater as well as the internal buffer size to be used.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  int	available() Returns 0 when when this stream has exhausted its input; and 1 otherwise.
  void	close() Closes the input stream.
  protected void	fill() Fills the input buffer with data to be decompressed.
  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 offset, int byteCount) Reads up to byteCount bytes of decompressed data and stores it in buffer starting at offset.
  void	reset() Reset the position of the stream to the last marked position.
  long	skip(long byteCount) Skips up to byteCount bytes of uncompressed data.

  • Methods inherited from class java.io.InputStream

    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

    The inflater used for this stream.

  • buf

    protected byte[] buf

    The input buffer used for decompression.

  • len

    protected int len

    The length of the buffer.

• Constructor Detail

  • InflaterInputStream

    public InflaterInputStream(InputStream is)

    This is the most basic constructor. You only need to pass the InputStream from which the compressed data is to be read from. Default settings for the Inflater and internal buffer are be used. In particular the Inflater expects a ZLIB header from the input stream.

    Parameters:

    is - the InputStream to read data from.

  • InflaterInputStream

    public InflaterInputStream(InputStream is,
                       Inflater inflater)

    This constructor lets you pass a specifically initialized Inflater, for example one that expects no ZLIB header.

    Parameters:

    is - the InputStream to read data from.

    inflater - the specific Inflater for decompressing data.

  • InflaterInputStream

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

    This constructor lets you specify both the Inflater as well as the internal buffer size to be used.

    Parameters:

    is - the InputStream to read data from.

    inflater - the specific Inflater for decompressing data.

    bsize - the size to be used for the internal buffer.

• Method Detail

  • read

    public int read()
             throws IOException

    Reads a single byte of decompressed data.

    Overrides:

    read in class FilterInputStream

    Returns:

    the byte read.

    Throws:

    IOException - if an error occurs reading the byte.

  • read

    public int read(byte[] buffer,
           int offset,
           int byteCount)
             throws IOException

    Reads up to byteCount bytes of decompressed data and stores it in buffer starting at offset.

    Overrides:

    read in class FilterInputStream

    Parameters:

    buffer - the byte array in which to store the bytes read.

    offset - the initial position in buffer to store the bytes read from this stream.

    byteCount - the maximum number of bytes to store in buffer.

    Returns:

    Number of uncompressed bytes read

    Throws:

    IOException - if this stream is closed or another I/O error occurs.

  • fill

    protected void fill()
                 throws IOException

    Fills the input buffer with data to be decompressed.

    Throws:

    IOException - if an IOException occurs.

  • skip

    public long skip(long byteCount)
              throws IOException

    Skips up to byteCount bytes of uncompressed data.

    Overrides:

    skip in class FilterInputStream

    Parameters:

    byteCount - the number of bytes to skip.

    Returns:

    the number of uncompressed bytes skipped.

    Throws:

    IllegalArgumentException - if byteCount < 0.

    IOException - if an error occurs skipping.

    See Also:

    FilterInputStream.mark(int), FilterInputStream.reset()

  • available

    public int available()
                  throws IOException

    Returns 0 when when this stream has exhausted its input; and 1 otherwise. A result of 1 does not guarantee that further bytes can be returned, with or without blocking.

    Although consistent with the RI, this behavior is inconsistent with InputStream.available(), and violates the Liskov Substitution Principle. This method should not be used.

    Overrides:

    available in class FilterInputStream

    Returns:

    0 if no further bytes are available. Otherwise returns 1, which suggests (but does not guarantee) that additional bytes are available.

    Throws:

    IOException - if this stream is closed or an error occurs

  • close

    public void close()
               throws IOException

    Closes the input stream.

    Specified by:

    close in interface Closeable

    Specified by:

    close in interface AutoCloseable

    Overrides:

    close in class FilterInputStream

    Throws:

    IOException - If an error occurs closing the input stream.

  • mark

    public void mark(int readlimit)

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

    Overrides:

    mark in class FilterInputStream

    Parameters:

    readlimit - of no use.

    See Also:

    FilterInputStream.markSupported(), FilterInputStream.reset()

  • reset

    public void reset()
               throws IOException

    Reset the position of the stream to the last marked 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

    See Also:

    FilterInputStream.mark(int), FilterInputStream.markSupported()

  • 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, always

    See Also:

    FilterInputStream.mark(int), FilterInputStream.reset(), FilterInputStream.skip(long)