NoWeatherHook

public class NoWeatherHook implements PluginInterface{
        NoWeatherListener nwl;

        public NoWeatherHook(NoWeatherListener nw){ nwl = nw; }

        public String getName(){
              return "NoWeather";
        }
        public int getNumParameters() {
              return 2;
        }
        public String checkParameters(Object[] os) {
            if ((os.length < 1) || (os.length > getNumParameters())) {
                return "Invalid amount of parameters.";
            }
            return null;
        }
        public Object run(Object[] os) {
            String type = (String)os[0];
            if(type.equalsIgnoreCase("CHECK")){
                if (nwl.prevrain){
                    return true;
                }else{
                    return false;
                }
            }else if (type.equalsIgnoreCase("SET")){
                Boolean b   = (Boolean)os[1];
                if (b){
                    nwl.prevrain = true;
                }else{
                    nwl.prevrain = false;
                }
            }
            return null;
        }
    }