--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,252 @@
+package de.intevation.flys.artifacts;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifactdatabase.data.DefaultStateData;
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.DefaultOutput;
+import de.intevation.artifactdatabase.state.State;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactFactory;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.MainValue;
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.model.Calculation;
+import de.intevation.flys.artifacts.model.MainValuesQFacet;
+import de.intevation.flys.artifacts.model.MainValuesWFacet;
+import de.intevation.flys.artifacts.model.NamedDouble;
+import de.intevation.flys.artifacts.model.WstValueTable;
+import de.intevation.flys.artifacts.model.WstValueTableFactory;
+
+import de.intevation.flys.artifacts.states.StaticState;
+import de.intevation.flys.artifacts.resources.Resources;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * Artifact to access names of Points Of Interest along a segment of a river.
+ * This artifact neglects (Static)FLYSArtifacts capabilities of interaction
+ * with the StateEngine by overriding the getState*-methods.
+ */
+public class MainValuesArtifact
+extends      StaticFLYSArtifact
+{
+    /** The logger for this class. */
+    private static Logger logger = Logger.getLogger(MainValuesArtifact.class);
+
+    /** The name of the artifact. */
+    public static final String ARTIFACT_NAME = "mainvalue";
+
+    /** One and only state to be in. */
+    protected transient State state = null;
+
+
+    /**
+     * Trivial Constructor.
+     */
+    public MainValuesArtifact() {
+        logger.debug("MainValuesArtifact.MainValuesartifact()");
+    }
+
+
+    /**
+     * Gets called from factory, to set things up.
+     */
+    @Override
+    public void setup(
+        String          identifier,
+        ArtifactFactory factory,
+        Object          context,
+        CallMeta        callMeta,
+        Document        data)
+    {
+        logger.debug("MainValuesArtifact.setup");
+        state = new StaticState("state.mainvalue.static", "state.mainvalue.static");
+        List<Facet> fs = new ArrayList<Facet>();
+        Facet qfacet = new MainValuesQFacet(Resources.getMsg(callMeta,
+                   "facet.discharge_curves.mainvalues.q",
+                   "facet.discharge_curves.mainvalues.q"));
+        Facet wfacet = new MainValuesWFacet(Resources.getMsg(callMeta,
+                   "facet.discharge_curves.mainvalues.w",
+                   "facet.discharge_curves.mainvalues.w"));
+        fs.add(qfacet);
+        fs.add(wfacet);
+        facets.put(state.getID(), fs);
+        spawnState();
+        super.setup(identifier, factory, context, callMeta, data);
+    }
+
+    protected State spawnState() {
+        state = new StaticState("state.mainvalue.static", "state.mainvalue.static");
+        List<Facet> fs = (List<Facet>) facets.get("state.mainvalue.static");
+        DefaultOutput mainValuesOutput2 = new DefaultOutput(
+                    "computed_discharge_curve",
+                    "output.computed_discharge_curve", "image/png",
+                    fs,
+                    "chart");
+
+        state.getOutputs().add(mainValuesOutput2);
+        return state;
+    }
+
+
+    @Override
+    protected void initialize(Artifact artifact, Object context, CallMeta meta) {
+        logger.debug("MainValuesArtifact.initialize");
+        WINFOArtifact winfo = (WINFOArtifact) artifact;
+        double location = FLYSUtils.getLocations(winfo)[0];
+        addData("location", new DefaultStateData("location", null, null,
+                    String.valueOf(location)));
+        addData("river", winfo.getData("river"));
+    }
+
+
+    /**
+     * Get a list containing the one and only State.
+     * @param  context ignored.
+     * @return list with one and only state.
+     */
+    @Override
+    protected List<State> getStates(Object context) {
+        ArrayList<State> states = new ArrayList<State>();
+        states.add(getState());
+        return states;
+    }
+
+
+    /**
+     * Get the "current" state.
+     * @param cc ignored.
+     * @return the "current" state.
+     */
+    @Override
+    protected State getCurrentState(Object cc) {
+        return getState();
+    }
+
+
+    /**
+     * Get the only possible state.
+     * @return the state.
+     */
+    protected State getState() {
+        return getState(null, null);
+    }
+
+
+    /**
+     * Get the state.
+     * @param context ignored.
+     * @param stateID ignored.
+     * @return the state.
+     */
+    @Override
+    protected State getState(Object context, String stateID) {
+        if (state != null)
+            return state;
+        else
+            return spawnState();
+    }
+
+
+    /**
+     * Access the Gauge that the mainvalues are taken from.
+     * @return Gauge that main values are taken from or null in case of
+     *         invalid parameterization.
+     */
+    protected Gauge getGauge() {
+        River river = FLYSUtils.getRiver(this);
+
+        if (river == null) {
+            return null;
+        }
+
+        double location = Double.parseDouble(
+                getDataAsString("location"));
+
+        return river.determineGaugeByPosition(location);
+    }
+
+
+    /**
+     * Get current location.
+     * @return the location.
+     */
+    public double getLocation() {
+        double location = Double.parseDouble(
+                (String)getData("location").getValue());
+        return location;
+    }
+
+
+    /**
+     * Get a list of "Q" main values.
+     * @return list of Q main values.
+     */
+    public List<NamedDouble> getMainValuesQ() {
+        List<NamedDouble> filteredList = new ArrayList<NamedDouble>();
+        Gauge gauge = getGauge();
+        WstValueTable interpolator = WstValueTableFactory.getTable(FLYSUtils.getRiver(this));
+        Calculation c = new Calculation();
+        double w_out[] = {0.0f};
+        double q_out[] = {0.0f};
+        double kms[] = {getLocation()};
+        double gaugeStation = gauge.getStation().doubleValue();
+        if (gauge != null) {
+            List<MainValue> orig = gauge.getMainValues();
+            for (MainValue mv : orig) {
+                if (mv.getMainValue().getType().getName().equals("Q")) {
+                    interpolator.interpolate(mv.getValue().doubleValue(),
+                            gaugeStation, kms, w_out, q_out, c);
+                    filteredList.add(new NamedDouble(
+                                mv.getMainValue().getName(),
+                                q_out[0]
+                                ));
+                }
+            }
+        }
+        return filteredList;
+    }
+
+
+    /**
+     * Get a list of "W" main values.
+     * @return list of W main values.
+     */
+    public List<NamedDouble> getMainValuesW() {
+        List<NamedDouble> filteredList = new ArrayList<NamedDouble>();
+        Gauge gauge = getGauge();
+        WstValueTable interpolator = WstValueTableFactory.getTable(FLYSUtils.getRiver(this));
+        Calculation c = new Calculation();
+        double gaugeStation = gauge.getStation().doubleValue();
+        double w_out[] = {0.0f};
+        double q_out[] = {0.0f};
+        double kms[] = {getLocation()};
+        if (gauge != null) {
+            List<MainValue> orig = gauge.getMainValues();
+            for (MainValue mv : orig) {
+                // We cannot interpolate the W values, so derive them
+                // from given Q values.
+                if (mv.getMainValue().getType().getName().equals("Q")) {
+                    interpolator.interpolate(mv.getValue().doubleValue(),
+                            gaugeStation, kms, w_out, q_out, c);
+                    filteredList.add(new NamedDouble(
+                                "W(" + mv.getMainValue().getName() +")",
+                                w_out[0]
+                                ));
+                }
+            }
+        }
+        return filteredList;
+    }
+}