ingo@322: package de.intevation.flys.artifacts.states;
ingo@322: 
ingo@322: import org.apache.log4j.Logger;
ingo@322: 
ingo@921: import de.intevation.artifacts.Artifact;
ingo@921: import de.intevation.artifacts.CallContext;
ingo@921: 
ingo@921: import de.intevation.artifactdatabase.data.StateData;
ingo@921: 
ingo@921: import de.intevation.flys.artifacts.FLYSArtifact;
ingo@921: 
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@921:     private Logger logger = Logger.getLogger(RangeState.class);
ingo@322: 
ingo@322: 
ingo@322:     public RangeState() {
ingo@322:     }
ingo@322: 
ingo@322: 
ingo@921:     protected abstract String   getLowerField();
ingo@921:     protected abstract String   getUpperField();
ingo@921:     protected abstract String   getStepField();
ingo@921:     protected abstract double[] getMinMax(Artifact artifact);
ingo@921: 
ingo@921: 
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@379:     protected boolean validateBounds(
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: 
ingo@322:         return true;
ingo@322:     }
ingo@921: 
ingo@921: 
ingo@921:     @Override
ingo@921:     public boolean validate(Artifact artifact, CallContext context)
ingo@921:     throws IllegalArgumentException
ingo@921:     {
ingo@921:         FLYSArtifact flys = (FLYSArtifact) artifact;
ingo@921: 
ingo@921:         StateData dFrom = getData(flys, getLowerField());
ingo@921:         StateData dTo   = getData(flys, getUpperField());
ingo@921:         StateData dStep = getData(flys, getStepField());
ingo@921: 
ingo@921:         String fromStr = dFrom != null ? (String) dFrom.getValue() : null;
ingo@921:         String toStr   = dTo   != null ? (String) dTo.getValue()   : null;
ingo@921:         String stepStr = dStep != null ? (String) dStep.getValue() : null;
ingo@921: 
ingo@921:         if (fromStr == null || toStr == null || stepStr == null) {
ingo@921:             throw new IllegalArgumentException("error_empty_state");
ingo@921:         }
ingo@921: 
ingo@921:         try {
ingo@921:             double from = Double.parseDouble(fromStr);
ingo@921:             double to   = Double.parseDouble(toStr);
ingo@921:             double step = Double.parseDouble(stepStr);
ingo@921: 
ingo@921:             double[] minmax = getMinMax(flys);
ingo@921: 
ingo@921:             return validateBounds(minmax[0], minmax[1], from, to, step);
ingo@921:         }
ingo@921:         catch (NumberFormatException nfe) {
ingo@921:             throw new IllegalArgumentException("error_invalid_double_value");
ingo@921:         }
ingo@921:     }
ingo@322: }
ingo@322: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :