--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/states/DGMSelect.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,140 @@
+package org.dive4elements.river.artifacts.states;
+
+import java.io.File;
+
+import org.w3c.dom.Element;
+
+import org.apache.log4j.Logger;
+
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.CallContext;
+
+import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import org.dive4elements.river.model.DGM;
+import org.dive4elements.river.model.River;
+
+import org.dive4elements.river.artifacts.FLYSArtifact;
+import org.dive4elements.river.utils.FLYSUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DGMSelect extends DefaultState {
+
+    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() {
+        return "dgm_datacage_panel";
+    }
+
+
+    @Override
+    protected Element createStaticData(
+        FLYSArtifact   flys,
+        ElementCreator creator,
+        CallContext    cc,
+        String         name,
+        String         value,
+        String         type
+    ) {
+        Element dataElement = creator.create("data");
+        creator.addAttr(dataElement, "name", name, true);
+        creator.addAttr(dataElement, "type", type, true);
+
+        Element itemElement = creator.create("item");
+        creator.addAttr(itemElement, "value", value, true);
+
+        creator.addAttr(itemElement, "label", getLabel(cc, value), true);
+        dataElement.appendChild(itemElement);
+
+        return dataElement;
+    }
+
+
+    public static String getLabel(CallContext cc, String value) {
+        logger.debug("Create label for value: " + value);
+
+        try {
+            DGM dgm = DGM.getDGM(Integer.parseInt(value));
+
+            File file = new File(dgm.getPath());
+            return file.getName();
+        }
+        catch (NumberFormatException nfe) {
+            logger.warn("Cannot parse int value: '" + value + "'");
+        }
+
+        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.getRange().getA().doubleValue();
+        double u = dgm.getRange().getB().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);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :