view flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DGMSelect.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 9d5f339d83a3
children a075f26a516c
line wrap: on
line source
package de.intevation.flys.artifacts.states;

import java.io.File;

import org.w3c.dom.Element;

import org.apache.log4j.Logger;

import de.intevation.artifacts.Artifact;
import de.intevation.artifacts.CallContext;

import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;

import de.intevation.flys.model.DGM;
import de.intevation.flys.model.River;

import de.intevation.flys.artifacts.FLYSArtifact;
import de.intevation.flys.utils.FLYSUtils;


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

    private static final Logger logger = Logger.getLogger(DGMSelect.class);

    public static final String ERR_EMPTY         = "error_no_dgm_selected";
    public static final String ERR_INVALID_DGM   = "error_invalid_dgm_selected";
    public static final String ERR_BAD_DGM_RANGE = "error_bad_dgm_range";
    public static final String ERR_BAD_DGM_RIVER = "error_bad_dgm_river";


    @Override
    protected String getUIProvider() {
        return "dgm_datacage_panel";
    }


    @Override
    protected Element createStaticData(
        FLYSArtifact   flys,
        ElementCreator creator,
        CallContext    cc,
        String         name,
        String         value,
        String         type
    ) {
        Element dataElement = creator.create("data");
        creator.addAttr(dataElement, "name", name, true);
        creator.addAttr(dataElement, "type", type, true);

        Element itemElement = creator.create("item");
        creator.addAttr(itemElement, "value", value, true);

        creator.addAttr(itemElement, "label", getLabel(cc, value), true);
        dataElement.appendChild(itemElement);

        return dataElement;
    }


    public static String getLabel(CallContext cc, String value) {
        logger.debug("Create label for value: " + value);

        try {
            DGM dgm = DGM.getDGM(Integer.parseInt(value));

            File file = new File(dgm.getPath());
            return file.getName();
        }
        catch (NumberFormatException nfe) {
            logger.warn("Cannot parse int value: '" + value + "'");
        }

        return "";
    }


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

        DGM dgm = getDGM(flys);

        if (dgm == null) {
            throw new IllegalArgumentException(ERR_INVALID_DGM);
        }

        double l = dgm.getLower().doubleValue();
        double u = dgm.getUpper().doubleValue();

        double[] range = FLYSUtils.getKmFromTo(flys);

        if (range[0] < l || range[0] > u || range[1] < l || range[1] > u) {
            throw new IllegalArgumentException(ERR_BAD_DGM_RANGE);
        }

        River selectedRiver = FLYSUtils.getRiver(flys);
        River dgmRiver      = dgm.getRiver();

        if (selectedRiver != dgmRiver) {
            throw new IllegalArgumentException(ERR_BAD_DGM_RIVER);
        }

        return true;
    }


    /**
     * Returns the DGM specified in the parameters of <i>flys</i>.
     *
     * @param flys The FLYSArtifact that knows the ID of a DGM.
     *
     * @throws IllegalArgumentException If the FLYSArtifact doesn't know the ID
     * of a DGM.
     *
     * @return the DGM specified by FLYSArtifact's parameters.
     */
    public static DGM getDGM(FLYSArtifact flys)
    throws IllegalArgumentException
    {
        try {
            Integer dgmId = flys.getDataAsInteger("dgm");
            if (dgmId == null) {
                throw new IllegalArgumentException(ERR_EMPTY);
            }

            logger.debug("Found selected dgm: '" + dgmId + "'");

            return DGM.getDGM(dgmId);
        }
        catch (NumberFormatException nfe) {
            throw new IllegalArgumentException(ERR_INVALID_DGM);
        }
    }
}
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