--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/FlowVelocityModelArtifact.java	Fri Oct 11 10:29:37 2013 +0200
@@ -0,0 +1,248 @@
+/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
+ * Software engineering by Intevation GmbH
+ *
+ * This file is Free Software under the GNU AGPL (>=v3)
+ * and comes with ABSOLUTELY NO WARRANTY! Check out the
+ * documentation coming with Dive4Elements River for details.
+ */
+
+package org.dive4elements.river.artifacts;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+import org.w3c.dom.Document;
+
+import org.dive4elements.artifactdatabase.state.DefaultOutput;
+import org.dive4elements.artifactdatabase.state.Facet;
+import org.dive4elements.artifactdatabase.state.FacetActivity;
+import org.dive4elements.artifactdatabase.state.State;
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.ArtifactFactory;
+import org.dive4elements.artifacts.CallMeta;
+import org.dive4elements.artifacts.common.utils.XMLUtils;
+import org.dive4elements.river.artifacts.model.Calculation;
+import org.dive4elements.river.artifacts.model.CalculationResult;
+import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;
+import org.dive4elements.river.model.FlowVelocityModel;
+import org.dive4elements.river.artifacts.model.FlowVelocityCalculation;
+import org.dive4elements.river.artifacts.model.FlowVelocityData;
+import org.dive4elements.river.artifacts.model.FlowVelocityFacet;
+import org.dive4elements.river.artifacts.states.StaticState;
+
+import org.dive4elements.river.artifacts.model.FacetTypes;
+
+
+/** Artifact to access flow velocity models. */
+public class FlowVelocityModelArtifact
+extends      StaticD4EArtifact
+implements   FacetTypes
+{
+    /** The logger for this class. */
+    private static Logger logger =
+        Logger.getLogger(FlowVelocityModelArtifact.class);
+
+    /** Artifact key name. */
+    private static final String NAME = "flowvelocitymodel";
+
+    /** Spawn only inactive facets. */
+    static {
+        // TODO: Move to configuration.
+        FacetActivity.Registry.getInstance()
+            .register(NAME, FacetActivity.INACTIVE);
+    }
+
+    /** Need to give the state an id. */
+    public static final String STATIC_STATE_NAME =
+        "state.flowvelocitymodel.static";
+
+    /** One and only state to be in. */
+    protected transient State state = null;
+
+    protected String DATA_ID = "ID";
+
+    /**
+     * Trivial Constructor.
+     */
+    public FlowVelocityModelArtifact() {
+        logger.debug("FlowVelocityModelArtifact.FlowVelocityModelArtifact");
+    }
+
+
+    /** Get artifact key name. */
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+
+    private Object getFlowVelocity() {
+        logger.debug("FlowVelocityModelArtifact.getFlowVelocity");
+        Integer id = getDataAsInteger(DATA_ID);
+
+        FlowVelocityModel model = FlowVelocityModel.getModel(id);
+        FlowVelocityData  data  =  new FlowVelocityData();
+
+        // TODO rangeaccess
+        FlowVelocityCalculation.prepareData(data, model, 0d, 1000d);
+
+        return new CalculationResult(
+            new FlowVelocityData[] {data} , new Calculation());
+    }
+
+
+    /** Create a static state. */
+    private State newState() {
+        return new StaticState(STATIC_STATE_NAME) {
+            public Object staticCompute(List<Facet> facets) {
+                 return getFlowVelocity();
+            }
+        };
+    }
+
+
+    /** Create a new state with bogus output. */
+    protected State spawnState() {
+        state = newState();
+        List<Facet> fs = getFacets(STATIC_STATE_NAME);
+        DefaultOutput output = new DefaultOutput(
+            "general",
+            "general",
+            "image/png",
+            fs,
+            "chart");
+
+        state.getOutputs().add(output);
+
+        return state;
+    }
+
+
+    /**
+     * Gets called from factory, to set things up.
+     */
+    @Override
+    public void setup(
+        String          identifier,
+        ArtifactFactory factory,
+        Object          context,
+        CallMeta        callMeta,
+        Document        data)
+    {
+        logger.debug("FlowVelocityModelArtifact.setup");
+
+        state = newState();
+        if (logger.isDebugEnabled()) {
+            logger.debug(XMLUtils.toString(data));
+        }
+
+        List<Facet> fs = new ArrayList<Facet>();
+
+        String code = getDatacageIDValue(data);
+
+        if (code != null) {
+            //String name = FlowVelocityModel.getFlowVelocityModelDescription(Integer.valueOf(code));
+            String name = "facet";
+            Facet facet = new FlowVelocityFacet(
+                0,
+                FLOW_VELOCITY_MAINCHANNEL,
+                name + "main",
+                ComputeType.ADVANCE, state.getID(), "hash"
+                );
+            fs.add(facet);
+            Facet tauFacet = new FlowVelocityFacet(
+                0,
+                FLOW_VELOCITY_TAU,
+                name+"tau",
+                ComputeType.ADVANCE, state.getID(), "hash"
+                );
+            fs.add(tauFacet);
+            Facet qFacet = new FlowVelocityFacet(
+                0,
+                FLOW_VELOCITY_DISCHARGE,
+                name+"q",
+                ComputeType.ADVANCE, state.getID(), "hash"
+                );
+            fs.add(qFacet);
+            Facet tFacet = new FlowVelocityFacet(
+                0,
+                FLOW_VELOCITY_TOTALCHANNEL,
+                name+"t",
+                ComputeType.ADVANCE, state.getID(), "hash"
+                );
+            fs.add(tFacet);
+            addFacets(state.getID(), fs);
+            addStringData(DATA_ID, code);
+        }
+        else {
+            logger.error("No id given.");
+        }
+
+        spawnState();
+        super.setup(identifier, factory, context, callMeta, data);
+    }
+
+
+    /**
+     * 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 (there is but one).
+     * @param cc ignored.
+     * @return the "current" (only possible) state.
+     */
+    @Override
+    public 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) {
+        return (state != null)
+            ? state
+            : spawnState();
+    }
+
+
+    /**
+     * Called via setup. Overridden to avoid cloning all data.
+     *
+     * @param artifact The master-artifact.
+     */
+    @Override
+    protected void initialize(
+        Artifact artifact,
+        Object context,
+        CallMeta meta)
+    {
+        logger.debug("FlowVelocityModelArtifact.initialize");
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :