# HG changeset patch
# User Björn Ricks <bjoern.ricks@intevation.de>
# Date 1351087068 -7200
# Node ID cac0878b4a92a41961ae9062fb9d743c20ce0f0a
# Parent  6302db90b63fcc089591432c65375a05a02d3997
Add a service to return measurement stations of a river

The new service returns an xml representation of the measurement stations on a
river.

diff -r 6302db90b63f -r cac0878b4a92 flys-artifacts/doc/conf/conf.xml
--- a/flys-artifacts/doc/conf/conf.xml	Wed Oct 24 15:56:19 2012 +0200
+++ b/flys-artifacts/doc/conf/conf.xml	Wed Oct 24 15:57:48 2012 +0200
@@ -206,6 +206,10 @@
                 name="dischargetablesoverview"
                 service="de.intevation.flys.artifacts.services.DischargeTablesOverview"
                 description="Returns an overview of the fixings of a given river.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
+            <service-factory
+                name="measurementstationinfo"
+                service="de.intevation.flys.artifacts.services.MeasurementStationInfoService"
+                description="Returns an overview of the measurement stations of a given river.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
         </service-factories>
 
     </factories>
diff -r 6302db90b63f -r cac0878b4a92 flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MeasurementStationInfoService.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MeasurementStationInfoService.java	Wed Oct 24 15:57:48 2012 +0200
@@ -0,0 +1,135 @@
+package de.intevation.flys.artifacts.services;
+
+import java.math.BigDecimal;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.CallMeta;
+import de.intevation.artifacts.GlobalContext;
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.model.RiverFactory;
+import de.intevation.flys.model.MeasurementStation;
+import de.intevation.flys.model.Range;
+import de.intevation.flys.model.River;
+
+/**
+ * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
+ */
+public class MeasurementStationInfoService extends FLYSService {
+
+    private static final Logger logger = Logger.getLogger(
+            GaugeOverviewInfoService.class);
+
+    public static final String RIVER_XPATH = "/art:river/text()";
+
+    @Override
+    public Document doProcess(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta
+    ) {
+        logger.debug("MeasurementStationInfoService.process");
+
+        String riverstr = XMLUtils.xpathString(
+            data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE);
+
+        River river = RiverFactory.getRiver(riverstr);
+
+        Document result = XMLUtils.newDocument();
+
+        if (river == null) {
+            logger.warn("No river with name " + riverstr + " found.");
+            return result;
+        }
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            result,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element go = ec.create("masurement-station-info");
+
+        double[] minmax  = river.determineMinMaxDistance();
+        double[] minmaxq = river.determineMinMaxQ();
+
+        Element r = ec.create("river");
+        ec.addAttr(r, "name", river.getName(), true);
+        ec.addAttr(r, "start", Double.toString(minmax[0]), true);
+        ec.addAttr(r, "end", Double.toString(minmax[1]), true);
+        ec.addAttr(r, "wstunit", river.getWstUnit().getName(), true);
+        ec.addAttr(r, "kmup", Boolean.toString(river.getKmUp()), true);
+        ec.addAttr(r, "minq", Double.toString(minmaxq[0]), true);
+        ec.addAttr(r, "maxq", Double.toString(minmaxq[1]), true);
+        ec.addAttr(r, "official", Long.toString(river.getOfficialNumber()),
+                    true);
+
+        Element egs = ec.create("measurement-stations");
+
+        List<MeasurementStation> mstations = river.getMeasurementStations();
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Loaded stations: " + mstations);
+        }
+
+        for (MeasurementStation mstation: mstations) {
+            Element eg = ec.create("measurement-station");
+
+            String name = mstation.getName();
+            if (name != null) {
+                ec.addAttr(eg, "name", name, true);
+            }
+
+            String type = mstation.getMeasurementType();
+            if (type != null) {
+                ec.addAttr(eg, "type", type, true);
+            }
+
+            String riverside = mstation.getRiverside();
+            if (riverside != null) {
+                ec.addAttr(eg, "riverside", riverside, true);
+            }
+
+            Double station = mstation.getStation();
+            if (station != null) {
+                ec.addAttr(eg, "station", Double.toString(station), true);
+            }
+
+            Range range = mstation.getRange();
+            if (range != null) {
+                BigDecimal a = range.getA();
+                if (a != null) {
+                    ec.addAttr(eg, "start", getStringValue(a), true);
+                }
+
+                BigDecimal b = range.getB();
+                if (b != null) {
+                    ec.addAttr(eg, "end", getStringValue(b), true);
+                }
+            }
+
+            egs.appendChild(eg);
+        }
+
+        go.appendChild(r);
+        go.appendChild(egs);
+        result.appendChild(go);
+
+        return result;
+    }
+
+    /**
+     * Returns a Double as String from a BigDecimal value.
+     *
+     * If value is null an empty String is returned.
+     */
+    private static String getStringValue(BigDecimal value) {
+        return value != null
+            ? Double.toString(value.doubleValue()) : "";
+    }
+}