--- a/flys-artifacts/ChangeLog	Mon Dec 19 09:08:40 2011 +0000
+++ b/flys-artifacts/ChangeLog	Mon Dec 19 10:01:17 2011 +0000
@@ -1,3 +1,14 @@
+2011-12-19  Ingo Weinzierl <ingo@intevation.de>
+
+	flys/issue380 (W-INFO / Überschwemmungskarte, falsches DGM)
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  convinience method that returns a parameter of FLYSArtifact as Integer.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java: Override
+	  validate() to determine, if the DGM selected by the user is valid for the
+	  current calculation range and river.
+
 2011-12-19	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
 
 	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java	Mon Dec 19 09:08:40 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java	Mon Dec 19 10:01:17 2011 +0000
@@ -550,6 +550,31 @@
 
 
     /**
+     * This method returns the value of a StateData object stored in the data
+     * pool of this Artifact as Integer.
+     *
+     * @param name The name of the StateData object.
+     *
+     * @return an Integer representing the value of the data object or null if
+     * no object was found for <i>name</i>.
+     *
+     * @throws NumberFormatException if the value of the data object could not
+     * be transformed into an Integer.
+     */
+    public Integer getDataAsInteger(String name)
+    throws NumberFormatException
+    {
+        String value = getDataAsString(name);
+
+        if (value != null && value.length() > 0) {
+            return Integer.parseInt(value);
+        }
+
+        return null;
+    }
+
+
+    /**
      * Add StateData containing a given string.
      * @param name Name of the data object.
      * @param value String to store.

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java	Mon Dec 19 09:08:40 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java	Mon Dec 19 10:01:17 2011 +0000
@@ -6,12 +6,16 @@
 
 import org.apache.log4j.Logger;
 
+import de.intevation.artifacts.Artifact;
 import de.intevation.artifacts.CallContext;
 
 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
 
+import de.intevation.flys.model.DGM;
+import de.intevation.flys.model.River;
+
 import de.intevation.flys.artifacts.FLYSArtifact;
-import de.intevation.flys.model.DGM;
+import de.intevation.flys.utils.FLYSUtils;
 
 
 /**
@@ -21,6 +25,11 @@
 
     private static final Logger logger = Logger.getLogger(DGMSelect.class);
 
+    public static final String ERR_EMPTY         = "error_no_dgm_selected";
+    public static final String ERR_INVALID_DGM   = "error_invalid_dgm_selected";
+    public static final String ERR_BAD_DGM_RANGE = "error_bad_dgm_range";
+    public static final String ERR_BAD_DGM_RIVER = "error_bad_dgm_river";
+
 
     @Override
     protected String getUIProvider() {
@@ -66,5 +75,66 @@
 
         return "";
     }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        DGM dgm = getDGM(flys);
+
+        if (dgm == null) {
+            throw new IllegalArgumentException(ERR_INVALID_DGM);
+        }
+
+        double l = dgm.getLower().doubleValue();
+        double u = dgm.getUpper().doubleValue();
+
+        double[] range = FLYSUtils.getKmFromTo(flys);
+
+        if (range[0] < l || range[0] > u || range[1] < l || range[1] > u) {
+            throw new IllegalArgumentException(ERR_BAD_DGM_RANGE);
+        }
+
+        River selectedRiver = FLYSUtils.getRiver(flys);
+        River dgmRiver      = dgm.getRiver();
+
+        if (selectedRiver != dgmRiver) {
+            throw new IllegalArgumentException(ERR_BAD_DGM_RIVER);
+        }
+
+        return true;
+    }
+
+
+    /**
+     * Returns the DGM specified in the parameters of <i>flys</i>.
+     *
+     * @param flys The FLYSArtifact that knows the ID of a DGM.
+     *
+     * @throws IllegalArgumentException If the FLYSArtifact doesn't know the ID
+     * of a DGM.
+     *
+     * @return the DGM specified by FLYSArtifact's parameters.
+     */
+    public static DGM getDGM(FLYSArtifact flys)
+    throws IllegalArgumentException
+    {
+        try {
+            Integer dgmId = flys.getDataAsInteger("dgm");
+            if (dgmId == null) {
+                throw new IllegalArgumentException(ERR_EMPTY);
+            }
+
+            logger.debug("Found selected dgm: '" + dgmId + "'");
+
+            return DGM.getDGM(dgmId);
+        }
+        catch (NumberFormatException nfe) {
+            throw new IllegalArgumentException(ERR_INVALID_DGM);
+        }
+    }
 }
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