--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/states/LocationSelect.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,135 @@
+package org.dive4elements.river.artifacts.states;
+
+import gnu.trove.TDoubleArrayList;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.CallContext;
+
+import org.dive4elements.artifacts.common.utils.XMLUtils;
+
+import org.dive4elements.artifactdatabase.data.StateData;
+
+import org.dive4elements.river.artifacts.FLYSArtifact;
+
+
+/**
+ * This state is used to realize the input of multiple locations as string.
+ *
+ * The string should be a whitespace separated list of double values where each
+ * double value represents a location.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class LocationSelect extends LocationDistanceSelect {
+
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(LocationSelect.class);
+
+
+    public LocationSelect() {
+    }
+
+
+    /** UI Provider (which input method should the client provide to user. */
+    @Override
+    protected String getUIProvider() {
+        return "location_panel";
+    }
+
+
+    @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(LOCATIONS)) {
+            Element min = createItem(
+                cr,
+                new String[] {"min", new Double(minVal).toString()});
+
+            Element max = createItem(
+                cr,
+                new String[] {"max", new Double(maxVal).toString()});
+
+            return new Element[] { min, max };
+        }
+
+        return null;
+    }
+
+
+    /** Validates data from artifact. */
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("LocationSelect.validate");
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        StateData    data = getData(flys, LOCATIONS);
+
+        String locationStr = data != null
+            ? (String) data.getValue()
+            : null;
+
+        if (locationStr == null || locationStr.length() == 0) {
+            logger.error("No locations given.");
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        double[] minmax = getMinMax(artifact);
+        double[] mm     = extractLocations(locationStr);
+
+        logger.debug("Inserted min location: " + mm[0]);
+        logger.debug("Inserted max location: " + mm[mm.length-1]);
+
+        return validateBounds(minmax[0], minmax[1], mm[0], mm[mm.length-1], 0d);
+    }
+
+
+    /**
+     * This method takes a string that consist of whitespace separated double
+     * values and returns the double values as array.
+     *
+     * @param locationStr The locations inserted in this state.
+     *
+     * @return the locations as array.
+     */
+    protected double[] extractLocations(String locationStr) {
+        String[] tmp               = locationStr.split(" ");
+        TDoubleArrayList locations = new TDoubleArrayList();
+
+        for (String l: tmp) {
+            try {
+                locations.add(Double.parseDouble(l));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        locations.sort();
+
+        return locations.toNativeArray();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :