--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ComputationRangeState.java	Thu Jun 30 11:32:17 2011 +0000
@@ -0,0 +1,223 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.data.StateData;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.RiverFactory;
+import de.intevation.flys.artifacts.model.WaterlevelFacet;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.resources.Resources;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ComputationRangeState
+extends    RangeState
+implements FacetTypes
+{
+    private static Logger logger =
+        Logger.getLogger(ComputationRangeState.class);
+
+
+    /** The name of the 'from' field. */
+    public static final String FROM = "ld_from";
+
+    /** The name of the 'to' field. */
+    public static final String TO = "ld_to";
+
+    /** The name of the 'step' field. */
+    public static final String STEP = "ld_step";
+
+    /** The default step width.*/
+    public static final int DEFAULT_STEP = 100;
+
+
+
+    public ComputationRangeState() {
+    }
+
+
+    @Override
+    protected Element createData(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        StateData   data,
+        CallContext context)
+    {
+        Element select = ProtocolUtils.createArtNode(
+            cr, "select", null, null);
+
+        cr.addAttr(select, "name", data.getName(), true);
+
+        Element label = ProtocolUtils.createArtNode(
+            cr, "label", null, null);
+
+        Element choices = ProtocolUtils.createArtNode(
+            cr, "choices", null, null);
+
+        label.setTextContent(Resources.getMsg(
+            context.getMeta(),
+            data.getName(),
+            data.getName()));
+
+        select.appendChild(label);
+
+        return select;
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        double[] minmax = getMinMax(artifact);
+
+        double minVal = Double.MIN_VALUE;
+        double maxVal = Double.MAX_VALUE;
+
+        if (minmax != null) {
+            minVal = minmax[0];
+            maxVal = minmax[1];
+        }
+        else {
+            logger.warn("Could not read min/max distance values!");
+        }
+
+        if (name.equals("ld_from")) {
+            Element min = createItem(
+                cr,
+                new String[] {"min", new Double(minVal).toString()});
+
+            return new Element[] { min };
+        }
+        else if (name.equals("ld_to")) {
+            Element max = createItem(
+                cr,
+                new String[] {"max", new Double(maxVal).toString()});
+
+            return new Element[] { max };
+        }
+        else {
+            Element step = createItem(
+                cr,
+                new String[] {"step", String.valueOf(getDefaultStep())});
+            return new Element[] { step };
+        }
+
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+
+
+    @Override
+    public Object computeFeed(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        logger.debug("computeFeed");
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res = old instanceof CalculationResult
+            ? (CalculationResult)old
+            : winfo.getDischargeCurveData();
+
+        if (facets == null) {
+            logger.debug("generate no facets");
+            return res;
+        }
+
+        WQKms [] wqkms = (WQKms [])res.getData();
+
+        logger.debug("generate " + wqkms.length + " facets.");
+
+        String stateID = winfo.getCurrentStateId();
+
+        for (int i = 0; i < wqkms.length; ++i) {
+            String name = wqkms[i].getName();
+            facets.add(new WaterlevelFacet(
+                i, DISCHARGE_CURVE, name, ComputeType.FEED, stateID, hash));
+        }
+
+
+        return res;
+    }
+
+
+    @Override
+    protected double[] getMinMax(Artifact artifact) {
+        FLYSArtifact flysArtifact = (FLYSArtifact) artifact;
+        StateData    data         = getData(flysArtifact, "river");
+
+        String name = data != null ? (String) data.getValue() : "";
+
+        logger.debug("Search for the min/max distances of '" + name + "'");
+
+        River river = RiverFactory.getRiver(name);
+
+        return river != null ? river.determineMinMaxDistance() : null;
+    }
+
+
+    protected double getDefaultStep() {
+        return DEFAULT_STEP;
+    }
+
+
+    @Override
+    protected String getLowerField() {
+        return FROM;
+    }
+
+
+    @Override
+    protected String getUpperField() {
+        return TO;
+    }
+
+
+    @Override
+    protected String getStepField() {
+        return STEP;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :