view flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/RangeState.java @ 4496:d8992459b408

Add method to return the facets of an artifact This methos should be used to get the facets of an artifact instead of accessing the facets member variable directly.
author Björn Ricks <bjoern.ricks@intevation.de>
date Wed, 14 Nov 2012 11:11:04 +0100
parents 022f62c75878
children 1358d0c8481c
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package de.intevation.flys.artifacts.states;

import org.apache.log4j.Logger;

import de.intevation.artifacts.Artifact;

import de.intevation.artifactdatabase.data.StateData;

import de.intevation.flys.artifacts.FLYSArtifact;


/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public abstract class RangeState extends DefaultState {

    /** The logger that is used in this class. */
    private Logger logger = Logger.getLogger(RangeState.class);


    public RangeState() {
    }


    protected abstract String   getLowerField();
    protected abstract String   getUpperField();
    protected abstract String   getStepField();
    protected abstract double[] getMinMax(Artifact artifact);


    protected boolean validateBounds(
        double fromValid, double toValid,
        double from,      double to)
    throws IllegalArgumentException
    {
        if (from < fromValid) {
            logger.error(
                "Invalid 'from'. " + from + " is smaller than " + fromValid);
            throw new IllegalArgumentException("error_feed_from_out_of_range");
        }
        else if (to > toValid) {
            logger.error(
                "Invalid 'to'. " + to + " is bigger than " + toValid);
            throw new IllegalArgumentException("error_feed_to_out_of_range");
        }

        return true;
    }


    /**
     * Validates a given range with a given valid range.
     *
     * @param fromValid Valid lower value of the range.
     * @param toValid Valid upper value of the range.
     * @param from The lower value.
     * @param to The upper value.
     * @param step The step width.
     *
     * @return true, if everything was fine, otherwise an exception is thrown.
     */
    protected boolean validateBounds(
        double fromValid, double toValid,
        double from,      double to,      double step)
    throws IllegalArgumentException
    {
        logger.debug("RangeState.validateRange");

        // XXX The step width is not validated at the moment!
        return validateBounds(fromValid, toValid, from, to);
    }


    @Override
    public boolean validate(Artifact artifact)
    throws IllegalArgumentException
    {
        FLYSArtifact flys = (FLYSArtifact) artifact;

        StateData dFrom = getData(flys, getLowerField());
        StateData dTo   = getData(flys, getUpperField());
        StateData dStep = getData(flys, getStepField());

        String fromStr = dFrom != null ? (String) dFrom.getValue() : null;
        String toStr   = dTo   != null ? (String) dTo.getValue()   : null;
        String stepStr = dStep != null ? (String) dStep.getValue() : null;

        if (fromStr == null || toStr == null || stepStr == null) {
            throw new IllegalArgumentException("error_empty_state");
        }

        try {
            double from = Double.parseDouble(fromStr);
            double to   = Double.parseDouble(toStr);
            double step = Double.parseDouble(stepStr);

            double[] minmax = getMinMax(flys);

            return validateBounds(minmax[0], minmax[1], from, to, step);
        }
        catch (NumberFormatException nfe) {
            throw new IllegalArgumentException("error_invalid_double_value");
        }
    }
}
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