/**
* Determine an appropriate FileUpload instance for the given encoding.
*
* <p>Default implementation returns the shared FileUpload instance if the encoding matches, else
* creates a new FileUpload instance with the same configuration other than the desired encoding.
*
* @param encoding the character encoding to use
* @return an appropriate FileUpload instance.
*/
protected FileUpload prepareFileUpload(String encoding) {
FileUpload fileUpload = getFileUpload();
FileUpload actualFileUpload = fileUpload;
// Use new temporary FileUpload instance if the request specifies
// its own encoding that does not match the default encoding.
if (encoding != null && !encoding.equals(fileUpload.getHeaderEncoding())) {
actualFileUpload = newFileUpload(getFileItemFactory());
actualFileUpload.setSizeMax(fileUpload.getSizeMax());
actualFileUpload.setHeaderEncoding(encoding);
}
return actualFileUpload;
}
