--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/states/GaugeDischargeState.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,161 @@
+package org.dive4elements.river.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.dive4elements.artifacts.CallMeta;
+import org.dive4elements.artifacts.CallContext;
+
+import org.dive4elements.artifactdatabase.state.Facet;
+
+import org.dive4elements.river.artifacts.ChartArtifact;
+import org.dive4elements.river.artifacts.GaugeDischargeArtifact;
+import org.dive4elements.river.artifacts.FLYSArtifact;
+
+import org.dive4elements.river.artifacts.model.GaugeDischargeFacet;
+import org.dive4elements.river.artifacts.model.FacetTypes;
+import org.dive4elements.river.artifacts.model.WQKms;
+import org.dive4elements.river.artifacts.model.ReportFacet;
+import org.dive4elements.river.artifacts.model.EmptyFacet;
+import org.dive4elements.river.artifacts.model.CalculationResult;
+
+import org.dive4elements.river.artifacts.resources.Resources;
+
+import org.dive4elements.river.model.Gauge;
+
+
+/**
+ * The only state for an GaugeDischargeState (River and km known).
+ */
+public class GaugeDischargeState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** Developer-centric description of facet. */
+    public static final String I18N_DESCRIPTION = "facet.discharge.curve";
+
+    /** The logger that is used in this state. */
+    private static final Logger logger =
+        Logger.getLogger(GaugeDischargeState.class);
+
+
+    /**
+     * Create i18ned name for gaugedischargeFacet.
+     * @param artifact The artifact which has information about the gauge.
+     * @param meta used for i18n.
+     * @return localized name for gaugedischargefacet.
+     */
+    protected String createFacetName(GaugeDischargeArtifact artifact,
+        CallMeta meta) {
+
+        Gauge gauge = artifact.getGauge();
+        Object[] args = new Object[] {
+            gauge.getName(),
+            gauge.getStation()
+        };
+
+        String name = Resources.getMsg(
+            meta,
+            "chart.computed.discharge.curve.gauge",
+            "",
+            args);
+
+        return name;
+    }
+
+
+    /**
+     * Add an GaugeDischargeFacet to list of Facets.
+     *
+     * @param artifact Ignored.
+     * @param hash Ignored.
+     * @param context Ignored.
+     * @param meta CallMeta to be used for internationalization.
+     * @param facets List to add AnnotationFacet to.
+     *
+     * @return null.
+     */
+    @Override
+    public Object computeInit(
+        FLYSArtifact artifact,
+        String       hash,
+        Object       context,
+        CallMeta     meta,
+        List<Facet>  facets
+    ) {
+        logger.debug("GaugeDischargeState.computeInit()");
+
+        GaugeDischargeFacet facet = new GaugeDischargeFacet(
+            0,
+            DISCHARGE_CURVE,
+            createFacetName((GaugeDischargeArtifact) artifact, meta));
+
+        facets.add(facet);
+
+        return null;
+    }
+
+
+    /**
+     * 'Calculate' Discharge at Gauge.
+     */
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        if (artifact instanceof GaugeDischargeArtifact) {
+            logger.debug("GaugeDischargeState.computeAdvance()");
+            GaugeDischargeArtifact dischargeArtifact = (GaugeDischargeArtifact) artifact;
+
+            CalculationResult res;
+
+
+            if (old instanceof CalculationResult) {
+                res = (CalculationResult) old;
+            }
+            else {
+                res = dischargeArtifact.getDischargeCurveData();
+            }
+
+            WQKms[] wqkms = (WQKms[]) res.getData();
+
+            if (wqkms != null && facets != null) {
+                logger.debug("GaugeDischargeState.computeAdvance(): create facets");
+
+                GaugeDischargeFacet facet = new GaugeDischargeFacet(
+                    0,
+                    DISCHARGE_CURVE,
+                    createFacetName(dischargeArtifact, context.getMeta()));
+
+                facets.add(facet);
+
+                //facets.add(new DataFacet(CSV, "CSV data"));
+                //facets.add(new DataFacet(PDF, "PDF data"));
+
+                if (res.getReport().hasProblems()) {
+                    facets.add(new ReportFacet());
+                }
+            }
+            else {
+                if (wqkms == null)
+                    logger.debug("GaugeDischargeState.computeAdvance(): wqkms 0");
+                else
+                    logger.debug("GaugeDischargeState.computeAdvance(): facets 0");
+            }
+
+            return res;
+        }
+        else if (artifact instanceof ChartArtifact) {
+            ChartArtifact chart = (ChartArtifact)artifact;
+            facets.add(new EmptyFacet());
+            return null;
+        }
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :