Package org.eclipse.mat.hprof

Class GZIPInputStream2

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.eclipse.mat.hprof.GZIPInputStream2

All Implemented Interfaces:

Closeable, AutoCloseable

public class GZIPInputStream2
extends FilterInputStream

A stream for reading Gzip compressed files. Uses a modified InflaterInputStream to allow the state of the stream to be duplicated, aiding code for random access to Gzip files.

Constructor Summary

Constructors

Constructor	Description
GZIPInputStream2(InputStream is)	Normal constructor
GZIPInputStream2(GZIPInputStream2 gs)	Copy constructor used for duplicating a stream.

Method Summary

Modifier and Type	Method	Description
void	close()
String	comment()
String	filename()
void	mark(int limit)
boolean	markSupported()
int	read()
int	read(byte[] buf, int off, int len)
void	reset()
long	skip(long n)	Need to implement FilterInputStream.skip(long) to the check CRC.
String	toString()

Methods inherited from class java.io.FilterInputStream

available, read

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

GZIPInputStream2

public GZIPInputStream2(GZIPInputStream2 gs)
                 throws IOException

Copy constructor used for duplicating a stream. To use either stream thereafter the underlying stream must be in the correct position.

Parameters:

gs - the stream to be duplicated

Throws:

IOException

GZIPInputStream2

public GZIPInputStream2(InputStream is)
                 throws IOException

Normal constructor

Parameters:

is - the compressed data

Throws:

IOException

Method Details

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] buf,
 int off,
 int len)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Need to implement FilterInputStream.skip(long) to the check CRC. We can call the underlying skip(long) if we are rereading data.

Overrides:

skip in class FilterInputStream

Parameters:

n - bytes to skip

Returns:

bytes actually skipped

Throws:

IOException

comment

public String comment()

filename

public String filename()

mark

public void mark(int limit)

Overrides:

mark in class FilterInputStream

reset

public void reset()
           throws IOException

Overrides:

reset in class FilterInputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class FilterInputStream

toString

public String toString()

Overrides:

toString in class Object

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class FilterInputStream

Throws:

IOException