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org.ydp.jai
Class ForwardSeekableStream  

java.lang.Object
  java.io.InputStream
      org.ydp.jai.SeekableStream
          org.ydp.jai.ForwardSeekableStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput

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public class ForwardSeekableStream

extends SeekableStream

A subclass of SeekableStream that may be used to wrap a regular InputStream efficiently. Seeking backwards is not supported.

This class is not a committed part of the JAI API. It may be removed or changed in future releases of JAI.

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Field Summary
(package private)  long	markPos           The marked position.
(package private)  long	pointer           The current position.
private  java.io.InputStream	src           The source InputStream.

 

Fields inherited from class org.ydp.jai.SeekableStream

 

Constructor Summary

ForwardSeekableStream(java.io.InputStream src)           Constructs a InputStreamForwardSeekableStream from a regular InputStream.

 

Method Summary
int	available()           Forwards the request to the real InputStream.
boolean	canSeekBackwards()           Returns false since seking backwards is not supported.
void	close()           Forwards the request to the real InputStream.
long	getFilePointer()           Returns the current position in the stream (bytes read).
void	mark(int readLimit)           Forwards the request to the real InputStream.
boolean	markSupported()           Forwards the request to the real InputStream.
int	read()           Forwards the request to the real InputStream.
int	read(byte[] b, int off, int len)           Forwards the request to the real InputStream.
void	reset()           Forwards the request to the real InputStream.
void	seek(long pos)           Seeks forward to the given position in the stream.
long	skip(long n)           Forwards the request to the real InputStream.

 

Methods inherited from class org.ydp.jai.SeekableStream

finalize, readBoolean, readByte, readChar, readCharLE, readDouble, readDoubleLE, readFloat, readFloatLE, readFully, readFully, readInt, readIntLE, readLine, readLong, readLongLE, readShort, readShortLE, readUnsignedByte, readUnsignedInt, readUnsignedIntLE, readUnsignedShort, readUnsignedShortLE, readUTF, skipBytes, wrapInputStream

 

Methods inherited from class java.io.InputStream

read

 

Methods inherited from class java.lang.Object

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

 

Field Detail

src

private java.io.InputStream src

The source InputStream.

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pointer

long pointer

The current position.

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markPos

long markPos

The marked position.

Constructor Detail

ForwardSeekableStream

public ForwardSeekableStream(java.io.InputStream src)

Constructs a InputStreamForwardSeekableStream from a regular InputStream.

Method Detail

read

public final int read()
               throws java.io.IOException

Forwards the request to the real InputStream.

Specified by:

read in class SeekableStream

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read

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

Forwards the request to the real InputStream.

Specified by:

read in class SeekableStream

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skip

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

Forwards the request to the real InputStream.

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available

public final int available()
                    throws java.io.IOException

Forwards the request to the real InputStream.

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close

public final void close()
                 throws java.io.IOException

Forwards the request to the real InputStream.

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mark

public final void mark(int readLimit)

Forwards the request to the real InputStream.

Overrides:

mark in class SeekableStream

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reset

public final void reset()
                 throws java.io.IOException

Forwards the request to the real InputStream.

Overrides:

reset in class SeekableStream

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markSupported

public boolean markSupported()

Forwards the request to the real InputStream.

Overrides:

markSupported in class SeekableStream

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canSeekBackwards

public final boolean canSeekBackwards()

Returns false since seking backwards is not supported.

Overrides:

canSeekBackwards in class SeekableStream

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getFilePointer

public final long getFilePointer()

Returns the current position in the stream (bytes read).

Specified by:

getFilePointer in class SeekableStream

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seek

public final void seek(long pos)
                throws java.io.IOException

Seeks forward to the given position in the stream. If pos is smaller than the current position as returned by getFilePointer(), nothing happens.

Specified by:

seek in class SeekableStream

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