Class SubImageInputStream

java.lang.Object

javax.imageio.stream.ImageInputStreamImpl

com.twelvemonkeys.imageio.stream.SubImageInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable, ImageInputStream

public final class SubImageInputStream
extends ImageInputStreamImpl

A wrapper for ImageInputStream to limit the number of bytes that can be read.

Version:

$Id: SubImageInputStream.java,v 1.0 Nov 8, 2009 2:50:58 PM haraldk Exp$

Field Summary

Fields

Modifier and Type	Field	Description
private final long	length
private final long	startPos
private final ImageInputStream	stream

Fields inherited from class ImageInputStreamImpl

bitOffset, byteOrder, flushedPos, streamPos

Constructor Summary

Constructors

Constructor	Description
SubImageInputStream(ImageInputStream stream, long length)	Creates a ImageInputStream, reading up to a maximum number of bytes from the underlying stream.

Method Summary

Modifier and Type	Method	Description
protected void	finalize()
long	length()
int	read()
int	read(byte[] bytes, int off, int len)
void	seek(long position)

Methods inherited from class ImageInputStreamImpl

checkClosed, close, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, mark, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, reset, setBitOffset, setByteOrder, skipBytes, skipBytes

Methods inherited from class Object

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

Field Details

stream

private final ImageInputStream stream

startPos

private final long startPos

length

private final long length

Constructor Details

SubImageInputStream

public SubImageInputStream(ImageInputStream stream,
 long length)
                    throws IOException

Creates a ImageInputStream, reading up to a maximum number of bytes from the underlying stream.

Parameters:

stream - the underlying stream

length - the maximum length to read from the stream. Note that stream may contain less than this maximum number of bytes.

Throws:

IOException - if stream's position can't be determined.

IllegalArgumentException - if stream == null or length < 0

Method Details

read

public int read()
         throws IOException

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Throws:

IOException

read

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

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Throws:

IOException

length

public long length()

Specified by:

length in interface ImageInputStream

Overrides:

length in class ImageInputStreamImpl

seek

public void seek(long position)
          throws IOException

Specified by:

seek in interface ImageInputStream

Overrides:

seek in class ImageInputStreamImpl

Throws:

IOException

finalize

protected void finalize()

Overrides:

finalize in class ImageInputStreamImpl