view flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java @ 1176:28154920e0b3

Introduced the possibility for States to transform/modify input before the data is added to FLYSArtifact. flys-artifacts/trunk@2761 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 15 Sep 2011 15:05:24 +0000
parents fbe18ad4caff
children 092e1e5020bc
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package de.intevation.flys.artifacts.states;

import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;

import de.intevation.artifacts.CallContext;
import de.intevation.artifacts.CallMeta;

import de.intevation.artifactdatabase.state.Facet;

import de.intevation.flys.artifacts.FLYSArtifact;
import de.intevation.flys.artifacts.context.FLYSContext;
import de.intevation.flys.artifacts.model.WMSLayerFacet;
import de.intevation.flys.artifacts.resources.Resources;
import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
import de.intevation.flys.utils.FLYSUtils;
import de.intevation.flys.utils.GeometryUtils;


public class RiverAxisState extends OutputState {

    public static final String I18N_DESCRIPTION = "floodmap.riveraxis";

    public static final String WMS_LAYER_NAME = "riveraxis";



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


    @Override
    public Object computeInit(
        FLYSArtifact artifact,
        String       hash,
        Object       context,
        CallMeta     meta,
        List<Facet>  facets
    ) {
        logger.debug("RiverAxisState.computeInit()");

        FLYSContext flysContext = null;

        if (context instanceof FLYSContext) {
            flysContext = (FLYSContext) context;
        }
        else {
            flysContext = (FLYSContext) ((CallContext) context).globalContext();
        }

        Map<String, String> wms = (Map<String, String>)
            flysContext.get(FLYSContext.RIVER_WMS);

        String river = artifact.getDataAsString("river");

        if(river == null || river.length() == 0) {
            logger.warn("No river found in the current parameterization.");
            return null;
        }

        String url = wms.get(river);

        // TODO Add config for background layer
        WMSLayerFacet facet = new WMSLayerFacet(
            0,
            FLOODMAP_RIVERAXIS,
            Resources.getMsg(meta, I18N_DESCRIPTION, I18N_DESCRIPTION),
            ComputeType.INIT,
            getID(), hash,
            url);

        facet.addLayer(WMS_LAYER_NAME);
        facet.setExtent(GeometryUtils.getRiverBounds(river));
        facet.setSrid(FLYSUtils.getRiverSrid(artifact));

        facets.add(facet);

        return null;
    }
}
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