use the following snippet to get the current binding

BindingContainer bindings =  BindingContext.getCurrent().getCurrentBindingsEntry();
 AttributeBinding at = (AttributeBinding)bindings.getControlBinding("Period");
 at.getInputValue();

The above mentioned code is useful only in case of retrieving values of any attribute binding in the page definition file. To retrieve specific information use it like

//For search binding use it like
FacesCtrlSearchBinding fc =
(FacesCtrlSearchBinding)bindings.findExecutableBinding("PeriodQuery");
or
FacesCtrlSearchBinding fc =
(FacesCtrlSearchBinding)bindings.get("PeriodQuery");

//For LOV binding use it like
FacesCtrlLOVBinding fc = (FacesCtrlLOVBinding)bindings.get("PeriodLOV");

some of the useful methods that can also be used for retrieving binding is

private BindingContainer getBindings() {
BindingContainer bindings =
(BindingContainer)fc.getApplication().evaluateExpressionGet(fc, "#{bindings}",
 BindingContainer.class);
return (bindings == null) ? null : bindings;
 }

to retrieve the bindings  or executable you use it like

//to retireve the tree/table bindings
FacesCtrlHierBinding fc = (FacesCtrlHierBinding)bindings.get("Period");

//to retireve the tree/table iterator
DCIteratorBinding dc = (DCIteratorBinding)bindings.get("PeriodIterator");