An interface used by ImageWriter implementations to notify callers of their image and thumbnail reading methods of warnings (non-fatal errors). Fatal errors cause the relevant read method to throw an IIOException.

Localization is handled by associating a Locale with each IIOWriteWarningListener as it is registered with an ImageWriter. It is up to the ImageWriter to provide localized messages.

Reports the occurence of a non-fatal error in encoding. Encoding will continue following the call to this method. The application may choose to display a dialog, print the warning to the console, ignore the warning, or take any other action it chooses.
Parameters
sourcethe ImageWriter object calling this method.
imageIndexthe index, starting with 0, of the image generating the warning.
warninga String containing the warning.