--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/states/WaterlevelSelectState.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,192 @@
+package org.dive4elements.river.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import org.dive4elements.artifacts.Artifact;
+import org.dive4elements.artifacts.CallContext;
+
+import org.dive4elements.artifactdatabase.data.DefaultStateData;
+import org.dive4elements.artifactdatabase.data.StateData;
+
+import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import org.dive4elements.river.artifacts.FLYSArtifact;
+import org.dive4elements.river.artifacts.model.CalculationResult;
+import org.dive4elements.river.artifacts.model.WQKms;
+import org.dive4elements.river.artifacts.model.extreme.ExtremeResult;
+import org.dive4elements.river.artifacts.resources.Resources;
+import org.dive4elements.river.utils.FLYSUtils;
+import org.dive4elements.river.utils.StringUtil;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WaterlevelSelectState extends DefaultState {
+
+    private static final Logger logger =
+        Logger.getLogger(WaterlevelSelectState.class);
+
+    public static final String SPLIT_CHAR = ";";
+
+    public static final String WINFO_WSP_STATE_ID = "state.winfo.waterlevel";
+
+    public static final String I18N_STATIC_KEY = "wsp.selected.string";
+
+
+    @Override
+    protected String getUIProvider() {
+        return "wsp_datacage_panel";
+    }
+
+
+    /**
+     * @param flys ignored
+     * @param cc   ignrored
+     */
+    @Override
+    public StateData transform(
+        FLYSArtifact flys,
+        CallContext  cc,
+        StateData    stateData,
+        String       name,
+        String       val
+    ) {
+        if (!isValueValid(val)) {
+            logger.error("The given input string is not valid: '" + val + "'");
+            return null;
+        }
+
+        return new DefaultStateData(name, null, null, StringUtil.unbracket(val));
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData data = flys.getData("wsp");
+
+        if (data == null) {
+            throw new IllegalArgumentException("WSP is empty");
+        }
+
+        return true;
+    }
+
+
+    @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);
+
+        String[] labels = getLabels(cc, value);
+        Object[] obj    = new Object[] { labels[0] };
+
+        String attrValue = Resources.getMsg(
+            cc.getMeta(), I18N_STATIC_KEY, I18N_STATIC_KEY, obj);
+
+        creator.addAttr(itemElement, "label", attrValue, true);
+        dataElement.appendChild(itemElement);
+
+        return dataElement;
+    }
+
+
+    /**
+     * Get name to display for selected watelerlevel (for example "Q=123")
+     * from the CalculationResult.
+     */
+    public static String[] getLabels(CallContext cc, String value) {
+        String[] parts = value.split(SPLIT_CHAR);
+
+        FLYSArtifact artifact = FLYSUtils.getArtifact(parts[0], cc);
+
+        CalculationResult rawData = (CalculationResult) artifact.compute(
+            cc,
+            null,
+            WINFO_WSP_STATE_ID,
+            ComputeType.ADVANCE,
+            false);
+
+        WQKms[] wqkms;
+
+        if (rawData.getData() instanceof ExtremeResult) {
+            wqkms = ((ExtremeResult) rawData.getData()).getWQKms();
+        }
+        else {
+            wqkms = (WQKms[]) rawData.getData();
+        }
+
+        int idx = -1;
+        try {
+            idx = Integer.parseInt(parts[2]);
+        }
+        catch (NumberFormatException nfe) { /* do nothing */ }
+
+        String name = wqkms[idx].getName();
+
+        return new String[] { StringUtil.wWrap(name) };
+    }
+
+
+    /**
+     * Validates the given String. A valid string for this state requires the
+     * format: "UUID;FACETNAME;FACETINDEX".
+     *
+     * @param value The string value requires validation.
+     *
+     * @return true, if the string applies the specified format, otherwise
+     * false.
+     */
+    public static boolean isValueValid(String value) {
+        logger.debug("Validate string: '" + value + "'");
+
+        value = StringUtil.unbracket(value);
+
+        logger.debug("Validate substring: '" + value + "'");
+
+        if (value == null || value.length() == 0) {
+            return false;
+        }
+
+        String[] parts = value.split(SPLIT_CHAR);
+
+        if (parts == null || parts.length < 3) {
+            return false;
+        }
+
+        if (parts[0] == null || parts[0].length() == 0) {
+            return false;
+        }
+
+        if (parts[1] == null || parts[1].length() == 0) {
+            return false;
+        }
+
+        try {
+            Integer.parseInt(parts[2]);
+        }
+        catch (NumberFormatException nfe) {
+            logger.error("Index is not a valid integer!", nfe);
+        }
+
+        return true;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :