--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/utils/Validator.java	Mon Jan 09 09:17:52 2012 +0000
@@ -0,0 +1,109 @@
+package de.intevation.flys.client.client.utils;
+import com.google.gwt.core.client.GWT;
+import com.smartgwt.client.widgets.form.DynamicForm;
+import com.smartgwt.client.widgets.form.fields.FormItem;
+import com.google.gwt.i18n.client.NumberFormat;
+import com.smartgwt.client.widgets.form.fields.events.ChangedHandler;
+import com.smartgwt.client.widgets.form.fields.events.ChangedEvent;
+import java.util.Map;
+import de.intevation.flys.client.client.FLYSConstants;
+
+/**
+ * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
+ *
+ * This validator is used for SmartGWT FormItems.
+ *
+ * To use this validator an attribute named 'internalType' has to be set.
+ * Values for 'internalType':
+ *   'double'
+ *   'integer'
+ */
+public class Validator implements ChangedHandler {
+
+    /** The interface that provides i18n messages. */
+    protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
+
+
+    /**
+     *
+     */
+    public void onChanged(ChangedEvent e) {
+        FormItem item = e.getItem();
+        DynamicForm form = e.getForm();
+        Map errors = form.getErrors();
+        String type = item.getAttribute("internalType");
+
+        if(type.equals("double")) {
+            validateFloat(item, errors);
+            form.setErrors(errors, true);
+        }
+        else if(type.equals("integer")) {
+            validateInteger(item, errors);
+            form.setErrors(errors, true);
+        }
+        else {
+            GWT.log("No Attribute 'internalType' set. Not using any validator.");
+        }
+    }
+
+
+    /**
+     *
+     */
+    protected boolean validateInteger(FormItem item, Map errors) {
+        boolean valid = true;
+
+        String v = (String) item.getValue();
+
+        NumberFormat f = NumberFormat.getDecimalFormat();
+
+        try {
+            if (v == null) {
+                throw new NumberFormatException("empty");
+            }
+
+            int value = Integer.parseInt(v);
+
+            errors.remove(item.getFieldName());
+        }
+        catch (NumberFormatException nfe) {
+            errors.put(item.getFieldName(), MSG.wrongFormat());
+
+            item.focusInItem();
+
+            valid = false;
+        }
+        return valid;
+    }
+
+
+    /**
+     *
+     */
+    protected boolean validateFloat(FormItem item, Map errors) {
+        boolean valid = true;
+
+        String v = (String) item.getValue();
+
+        NumberFormat f = NumberFormat.getDecimalFormat();
+
+        try {
+            if (v == null) {
+                throw new NumberFormatException("empty");
+            }
+
+            double value = f.parse(v);
+
+            errors.remove(item.getFieldName());
+        }
+        catch (NumberFormatException nfe) {
+            errors.put(item.getFieldName(), MSG.wrongFormat());
+
+            item.focusInItem();
+
+            valid = false;
+        }
+        return valid;
+    }
+}
+