Daily Archives: July 21, 2010

Ways to set the Query Mode programatically

1 Reply

The following snippet will be helpful in setting up the mode of the query criteria in programmatic way.

public Boolean setAdvancedMode(){
              QueryDescriptor descriptor =
                      (QueryDescriptor)evaluateEL
                  ("#{bindings.SearchCriteriaQuery.queryDescriptor}");
              descriptor.changeMode(QueryDescriptor.QueryMode.ADVANCED);
             return true;
}

public Object evaluateEL(String el) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ELContext elContext = facesContext.getELContext();
        ExpressionFactory expressionFactory =
            facesContext.getApplication().getExpressionFactory();
        ValueExpression exp =
            expressionFactory.createValueExpression(elContext, el,
                                                    Object.class);
       return exp.getValue(elContext);
    }

Easiest way to get the current binding from the bean

6 Replies

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");