refreshRateModel = new Model<Integer>();

        refreshRateModel.setObject(coreDaoService
                .getWallboardRefreshTimeInSeconds());

        Form<String> viewerAjaxrefreshRateForm = new Form<String>(
                "viewerAjaxrefreshRateForm") {
            @Override
            protected void onSubmit() {
                Integer newRefreshRate = refreshRateModel.getObject();
                coreDaoService
                        .saveWallboardRefreshTimeInSeconds(newRefreshRate);
                info("Stored new refresh rate");

            }
        };

        TextField<Integer> refreshRateTextField = new TextField<Integer>(
                "refreshRate", refreshRateModel);
        RangeValidator<Integer> rangeValidator = new
RangeValidator<Integer>(1,
                1800);
        refreshRateTextField.add(rangeValidator);
        viewerAjaxrefreshRateForm.add(refreshRateTextField);
        add(viewerAjaxrefreshRateForm);

when I enter a value I get this exception:

WicketMessage: Exception 'java.lang.ClassCastException:
java.lang.Integer cannot be cast to java.lang.String' occurred during
validation org.apache.wicket.validation.validator.RangeValidator on
component 5:viewerAjaxrefreshRateForm:refreshRate

 Stacktrace

Root cause:

java.lang.ClassCastException: java.lang.Integer cannot be cast to
java.lang.String
     at java.lang.String.compareTo(String.java:92)
     at 
org.apache.wicket.validation.validator.RangeValidator.validate(RangeValidator.java:76)
     at 
org.apache.wicket.markup.html.form.FormComponent.validateValidators(FormComponent.java:1445)
     at 
org.apache.wicket.markup.html.form.FormComponent.validate(FormComponent.java:1042)
     at org.apache.wicket.markup.html.form.Form$17.validate(Form.java:1833)
     at 
org.apache.wicket.markup.html.form.Form$ValidationVisitor.component(Form.java:164)
     at 
org.apache.wicket.markup.html.form.Form$ValidationVisitor.component(Form.java:148)
     at 
org.apache.wicket.util.visit.Visits.visitPostOrderHelper(Visits.java:278)
     at 
org.apache.wicket.util.visit.Visits.visitPostOrderHelper(Visits.java:267)
     at org.apache.wicket.util.visit.Visits.visitPostOrder(Visits.java:249)
     at 
org.apache.wicket.markup.html.form.FormComponent.visitFormComponentsPostOrder(FormComponent.java:338)
     at 
org.apache.wicket.markup.html.form.Form.visitFormComponentsPostOrder(Form.java:1041)
     at 
org.apache.wicket.markup.html.form.Form.validateComponents(Form.java:1825)
     at org.apache.wicket.markup.html.form.Form.validate(Form.java:1805)
     at org.apache.wicket.markup.html.form.Form.process(Form.java:863)
     at org.apache.wicket.markup.html.form.Form.process(Form.java:821)
     at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:786)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:211)
     at 
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:192)
     at 
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:173)
     at 
org.apache.wicket.request.RequestHandlerStack.executeRequestHandler(RequestHandlerStack.java:84)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:206)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:248)
     at org.apache.wicket.protocol.h

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