private Integer getFromParameter(Map<String, String> parameters) throws TransformationOperationException {
        return getSubStringParameter(parameters, fromParam, 0);
    }
private Integer getFromParameter ( Map < String , String > parameters ) throws TransformationOperationException { return getSubStringParameter ( parameters , fromParam , 0 ) ; }
Get the 'from' parameter from the parameters. If the parameter is not set 0 is taken instead.