Package org.jpedal.io.filter

Class RunLengthInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.jpedal.io.filter.RunLengthInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class RunLengthInputStream
extends FilterInputStream

An input stream that lazily decodes runlength encoded data from the wrapped stream

The data stream in Run Length Encoding will consist of a sequence of runs, where each run shall consist of a length byte followed by 1 to 128 bytes of data. If the length byte is in the range 0 to 127, the following length + 1 (1 to 128) bytes shall be copied literally during decompression. If length is in the range 129 to 255, the following single byte shall be copied 257 - length (2 to 128) times during decompression. A length value of 128 shall denote EOD.
- PDF Spec ISO 32000-2

Constructor Summary

Constructors

Constructor	Description
RunLengthInputStream(InputStream in)

Method Summary

Modifier and Type	Method	Description
int	available()
boolean	markSupported()
int	read()
int	read(byte[] outputBytes, int outputOffset, int byteCount)
long	skip(long skipCount)

Methods inherited from class java.io.FilterInputStream

close, mark, read, reset

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, toString, wait, wait, wait

Constructor Details

RunLengthInputStream

public RunLengthInputStream(InputStream in)

Method Details

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] outputBytes,
 int outputOffset,
 int byteCount)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

skip

public long skip(long skipCount)
          throws IOException

Overrides:

skip in class FilterInputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class FilterInputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class FilterInputStream