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Provides ImageInputStream and ImageOutputStream
classes for use with the Java Image I/O Framework. The
FileChannel-based classes use the new I/O {@link java.nio}
package to accelerate reading and writing of image data.
FileChannelImageInputStream
FileChannelImageInputStream uses memory mapping and NIO view
Buffers to perform its data reading. It may be created by direct
instantiation given a FileChannel or via the Java Image I/O
plug-in mechanism, for example from
ImageIO.createImageInputStream().
A service provider is also registered which creates an
ImageInputStream given a
{@link java.nio.channels.ReadableByteChannel}. If the
ReadableByteChannel is a
FileChannel then the ImageInputStream will be a
FileChannelImageInputStream. Otherwise an
InputStream will be derived from the Channel and
wrapped by a FileCacheImageInputStream if a disk cache is being
used and does not cause a security violation, or a
MemoryCacheImageInputStream if disk caching is disabled or not
permitted.
FileChannelImageOutputStream
FileChannelImageOutputStream uses memory mapping and NIO view
Buffers to perform its data reading and direct NIO and view
Buffers to perform its data writing. It may be created by direct
instantiation given a FileChannel or via the Java Image I/O
plug-in mechanism, for example from
ImageIO.createImageOutputStream().
A service provider is also registered which creates an
ImageOutputStream given a
{@link java.nio.channels.WritableByteChannel}. If the
WritableByteChannel is a
FileChannel which has been opened for both reading and writing,
then the ImageOutputStream will be a
FileChannelImageOutputStream. Otherwise an
OutputStream will be derived from the Channel and
wrapped by a FileCacheImageOutputStream if a disk cache is being
used and does not cause a security violation, or a
MemoryCacheImageOutputStream if disk caching is disabled or not
permitted.
RawImageInputStream
A RawImageInputStream provides a data input source for the
"raw" image format ImageReader plug-in. The
RawImageInputStream constructor which requires an
{@link org.xml.sax.InputSource} parameter allows an application to use
a pre-established XML description of the raw image file. This may be useful
in cases where groups of files have the same layout in which case identical
or similar XML description files may be re-used. Such a description file
would be used to create a FileInputStream from which the
InputSource would be created.
SegmentedImageInputStream
A SegmentedImageInputStream provides a contiguous view of
another ImageInputStream which itself consists of a sequence of
discontiguous segments containing the image data of interest. Such a stream
may be used for example in conjunction with a RawImageInputStream
to enable reading from a data source which has non-image data interspersed
with the image data. For example, an image could be stored in a line-oriented
fashion with prefix data such as a time stamp embedded in each line.
@since 1.0