--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/utils/IntegerValidator.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,45 @@
+package org.dive4elements.river.client.client.utils;
+
+import java.util.Map;
+
+import com.google.gwt.core.client.GWT;
+
+import com.smartgwt.client.widgets.form.fields.FormItem;
+
+import org.dive4elements.river.client.client.FLYSConstants;
+
+/**
+ * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
+ */
+public class IntegerValidator implements Validator {
+
+    /** The interface that provides i18n messages. */
+    protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
+
+    /**
+     *
+     */
+    public boolean validate(FormItem item, Map errors) {
+        boolean valid = true;
+
+        String v = item.getValue().toString();
+
+        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;
+    }
+}