ingo@322: package de.intevation.flys.artifacts.states;
ingo@322: 
ingo@322: import org.apache.log4j.Logger;
ingo@322: 
ingo@322: 
ingo@322: /**
ingo@322:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@322:  */
ingo@322: public abstract class RangeState extends DefaultState {
ingo@322: 
ingo@322:     /** The logger that is used in this class.*/
ingo@322:     private static Logger logger = Logger.getLogger(RangeState.class);
ingo@322: 
ingo@322: 
ingo@322:     public RangeState() {
ingo@322:     }
ingo@322: 
ingo@322: 
ingo@322:     /**
ingo@322:      * Validates a given range with a given valid range.
ingo@322:      *
ingo@322:      * @param fromValid Valid lower value of the range.
ingo@322:      * @param toValid Valid upper value of the range.
ingo@322:      * @param from The lower value.
ingo@322:      * @param to The upper value.
ingo@322:      * @param step The step width.
ingo@322:      *
ingo@322:      * @return true, if everything was fine, otherwise an exception is thrown.
ingo@322:      */
ingo@322:     protected boolean validateRange(
ingo@322:         double fromValid, double toValid,
ingo@322:         double from,      double to,      double step)
ingo@322:     throws IllegalArgumentException
ingo@322:     {
ingo@322:         logger.debug("RangeState.validateRange");
ingo@322: 
ingo@322:         if (from < fromValid) {
ingo@322:             logger.error(
ingo@322:                 "Invalid 'from'. " + from + " is smaller than " + fromValid);
ingo@322:             throw new IllegalArgumentException("error_feed_from_out_of_range");
ingo@322:         }
ingo@322:         else if (to > toValid) {
ingo@322:             logger.error(
ingo@322:                 "Invalid 'to'. " + to + " is bigger than " + toValid);
ingo@322:             throw new IllegalArgumentException("error_feed_to_out_of_range");
ingo@322:         }
ingo@322:         else if (from > to) {
ingo@322:             throw new IllegalArgumentException("error_feed_from_bigger_to");
ingo@322:         }
ingo@322: 
ingo@322:         return true;
ingo@322:     }
ingo@322: }
ingo@322: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :