WebAPICommand command = null;
Form options = getRequest().getResourceRef().getQueryAsForm();
String commandName = (String) getRequest().getAttributes().get("command");
MediaType format = resolveFormat(options, variant);
try {
ParameterSet params = new FormParams(options);
command = CommandBuilder.build(commandName, params);
assert command != null;
} catch (CommandSpecException ex) {
rep = formatException(ex, format);
}