org.icepdf.core.pobjects.filters
Class ChunkingInputStream

java.lang.Object
  java.io.InputStream
      org.icepdf.core.pobjects.filters.ChunkingInputStream

All Implemented Interfaces:

java.io.Closeable

Direct Known Subclasses:

ASCII85Decode, ASCIIHexDecode, FlateDecode, LZWDecode, PredictorDecode, RunLengthDecode

public abstract class ChunkingInputStream
extends java.io.InputStream

Most of the filters have to read in a chunk of data from their input stream, and do some processing on it, before they can make it available to others

Since:

2.0

Author:

Mark Collette

Field Summary

protected byte[]	buffer
protected java.io.InputStream	in

Constructor Summary

ChunkingInputStream()

Method Summary

int	available()
void	close()
protected int	fillBufferFromInputStream() For some reason, when reading from InflaterInputStream, if we ask to fill a buffer, it will instead only give us a chunk at a time, even though more data is available, and buffer.length has bee requested
protected int	fillBufferFromInputStream(int offset, int length)
protected abstract int	fillInternalBuffer() This is only called if bufferAvailable is 0.
void	mark(int readlimit)
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int length)
void	reset()
protected void	setBufferSize(int size)
protected void	setInputStream(java.io.InputStream input)
long	skip(long n)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

in

protected java.io.InputStream in

buffer

protected byte[] buffer

Constructor Detail

ChunkingInputStream

public ChunkingInputStream()

Method Detail

setInputStream

protected void setInputStream(java.io.InputStream input)

setBufferSize

protected void setBufferSize(int size)

fillBufferFromInputStream

protected int fillBufferFromInputStream()
                                 throws java.io.IOException

For some reason, when reading from InflaterInputStream, if we ask to fill a buffer, it will instead only give us a chunk at a time, even though more data is available, and buffer.length has bee requested

Throws:

java.io.IOException

fillBufferFromInputStream

protected int fillBufferFromInputStream(int offset,
                                        int length)
                                 throws java.io.IOException

Throws:

java.io.IOException

fillInternalBuffer

protected abstract int fillInternalBuffer()
                                   throws java.io.IOException

This is only called if bufferAvailable is 0. Implementations should read in more data, and return how many bytes are now available

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream

mark

public void mark(int readlimit)

Overrides:

mark in class java.io.InputStream

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

skip

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

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object