if (!entry.getValue().isEmpty()) {
// We keep only the first value
// FIXME We create the file once again...
String fv = entry.getValue().iterator().next();
log.debug("File value is: {}", fv);
inmgr.addInputProvider(new FileInputProvider(new File(URI.create(fv))));
// We remove it form the additional parameter list
this.parameters.remove("url");
} else {
// Parameter exists with no value
log.error("Parameter 'url' must have a value!");