Constructor Detail

• GzipFileBuffer

  public GzipFileBuffer(File file)

  Create a GzipFileBuffer for the entire file.

  Parameters:

  file - the gzip-compressed file

• GzipFileBuffer

  public GzipFileBuffer(File file,
                        int offset,
                        int sublen)

  Create a GzipFileBuffer for a portion of the uncompressed data.

  Parameters:

  file - the gzip-compressed file

  offset - the byte offset to start reading from (uncompressed)

  sublen - the number of bytes to read (uncompressed), or 0 for all

Method Detail

• getInputStream

  public InputStream getInputStream()
                             throws IOException

  Get a GZIP decompressing InputStream, wrapped with a counter. Caller must call readComplete().

  Specified by:

  getInputStream in interface Buffer

  Overrides:

  getInputStream in class FileBuffer

  Returns:

  new InputStream chain for reading uncompressed data

  Throws:

  IOException - on I/O error

• getLength

  public int getLength()

  Returns the actual uncompressed size. Only known after reading and calling readComplete(true), or after writing and calling writeComplete(true), otherwise returns 0.

  Specified by:

  getLength in interface Buffer

  Overrides:

  getLength in class FileBuffer

  Returns:

  the uncompressed length in bytes

• getOutputStream

  public OutputStream getOutputStream()
                               throws IOException

  Get a GZIP compressing OutputStream, wrapped with a counter. Caller must call writeComplete().

  Specified by:

  getOutputStream in interface Buffer

  Overrides:

  getOutputStream in class FileBuffer

  Returns:

  new OutputStream chain for writing compressed data

  Throws:

  IllegalStateException - if offset > 0 or already open for writing

  IOException - on I/O error

• readComplete

  public void readComplete(boolean success)

  Close the input stream and record the uncompressed length if successful.

  Specified by:

  readComplete in interface Buffer

  Overrides:

  readComplete in class FileBuffer

  Parameters:

  success - if true, records the bytes read

• toString

  public String toString()

  Overrides:

  toString in class FileBuffer

• writeComplete

  public void writeComplete(boolean success)

  Close the output stream and record the uncompressed length if successful.

  Specified by:

  writeComplete in interface Buffer

  Overrides:

  writeComplete in class FileBuffer

  Parameters:

  success - if true, records the bytes written