Package org.apache.xmlgraphics.image.loader.impl

Class PreloaderTIFF

java.lang.Object

org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader

org.apache.xmlgraphics.image.loader.impl.PreloaderTIFF

All Implemented Interfaces:

ImagePreloader

public class PreloaderTIFF
extends AbstractImagePreloader

Image preloader for TIFF images.

Note: The implementation relies on the TIFF codec code in Apache XML Graphics Commons for access to the TIFF directory.

Field Summary

Fields

Modifier and Type	Field	Description
private static org.apache.commons.logging.Log	log
private static int	TIFF_SIG_LENGTH

Fields inherited from interface org.apache.xmlgraphics.image.loader.spi.ImagePreloader

DEFAULT_PRIORITY

Constructor Summary

Constructors

Constructor	Description
PreloaderTIFF()

Method Summary

Modifier and Type	Method	Description
private ImageInfo	createImageInfo(java.lang.String uri, javax.imageio.stream.ImageInputStream in, ImageContext context)
ImageInfo	preloadImage(java.lang.String uri, javax.xml.transform.Source src, ImageContext context)	"Preloads" an image, i.e.

Methods inherited from class org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader

getHeader, getPriority

Methods inherited from class java.lang.Object

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

Field Detail

log

private static org.apache.commons.logging.Log log

TIFF_SIG_LENGTH

private static final int TIFF_SIG_LENGTH

See Also:

Constant Field Values

Constructor Detail

PreloaderTIFF

public PreloaderTIFF()

Method Detail

preloadImage

public ImageInfo preloadImage(java.lang.String uri,
                              javax.xml.transform.Source src,
                              ImageContext context)
                       throws java.io.IOException,
                              ImageException

"Preloads" an image, i.e. indentifies whether the source image is supported by this implementation and determines the image's intrinsic size and possibly some additional information. The image is usually not fully loaded at this time to conserve memory. The method returns null if the image was not identified. An ImageException is only thrown if the image is identified but some error has happened while working on the file.

Parameters:

uri - the original (unresolved) URI of the image

src - a image source the image is loaded from

context - the context object that provides configuration information

Returns:

an image info object with the basic information about an image or null if the image is not supported by this implementation

Throws:

ImageException

java.io.IOException - if an I/O error occurs while preloading the image

createImageInfo

private ImageInfo createImageInfo(java.lang.String uri,
                                  javax.imageio.stream.ImageInputStream in,
                                  ImageContext context)
                           throws java.io.IOException,
                                  ImageException

Throws:

java.io.IOException

ImageException