h:selectBooleanCheckbox

Question

Hello,
I have a field in the db - Use for Forecast. This field is of char(1) datatype. Ie it returns a 'Y' or an 'N'.
This field in the UI is represented as a checkbox.
When this field returns 'Y', in the UI , i want the corresponding checkbox to be checked. How do I render this? Any ideas? I am using the DAO pattern along with JSF for the front end with WSAD 5.1.2 as IDE and websphere 5.1 as app server.

Answer 1

hey,
your solution did work. But I have a problem.
As suggested, I have a set and get method in the bean for conversion from string to boolean and vice versa. However, when i say
<h:panelGroup rendered="#{parmHandler.renderParm.useForForecastRendered}">          <h:selectBooleanCheckbox styleClass="selectManyCheckbox" id="useForForecast"
     value="#{parmHandler.model.useForForecastBoolean}">          </h:selectBooleanCheckbox>               
</h:panelGroup>
it gets rendered properly when i load the form with data retrieved from db. If I render the same page for creating a new record, it gives me the foll exception as follows:
Caused by: javax.faces.el.EvaluationException: Error getting property 'useForForecastBoolean' from bean of type com.nwa.dymond.parm.holidayFcst.HolidayFcstParmModel: java.lang.NullPointerException
at com.sun.faces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java(Compiled Code))
at com.ibm.faces.databind.SelectItemsPropResolver.getValue(SelectItemsPropResolver.java(Compiled Code))
at com.ibm.faces.sdo.SdoPropertyResolver.getValue(SdoPropertyResolver.java(Compiled Code))
at com.ibm.faces.application.SuperPropertyResolver.getValue(SuperPropertyResolver.java(Compiled Code))
at com.sun.faces.el.impl.ArraySuffix.evaluate(ArraySuffix.java(Compiled Code))
at com.sun.faces.el.impl.ComplexValue.evaluate(ComplexValue.java(Compiled Code))
at com.sun.faces.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:238)
at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:155)
... 58 more
Caused by: java.lang.NullPointerException
     at com.nwa.dymond.parm.holidayFcst.HolidayFcstParmModel.getUseForForecastBoolean(HolidayFcstParmModel.java:166)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
     at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
     ... 66 more
My bean definitions are as follows:
private String useForForecast;
private boolean useForForecastBoolean = true;
public void setUseForForecast(String newUseForForecast) {
          useForForecast = newUseForForecast ;
     public String getUseForForecast() {
          return useForForecast ;
     public boolean getUseForForecastBoolean() {          
          if(!useForForecast.equalsIgnoreCase(null) && useForForecast.equalsIgnoreCase("Y")) {
               useForForecastBoolean = true;
          else if(!useForForecast.equalsIgnoreCase(null) && useForForecast.equalsIgnoreCase("N")) {
               useForForecastBoolean = false;
          else if(useForForecast.equalsIgnoreCase(null)) {
               useForForecastBoolean = true;          
          return useForForecastBoolean;
     public void setUseForForecastBoolean(boolean parmUseForForecast) {
          useForForecastBoolean = parmUseForForecast;
          if(useForForecastBoolean){
               setUseForForecast("Y");
          else {
               setUseForForecast("N");
Could it be bcos i am using a boolean instead of wrapper 'Boolean'.