final  void afterRender() 
{
        environment.pop(RadioContainer.class);
}

Pops the RadioContainer off the Environment.

 final ValueEncoder defaultEncoder() 
{
        return defaultProvider.defaultValueEncoder("value", resources);
}

 String defaultLabel() 
{
        return defaultProvider.defaultLabel(resources);
}

 public String getClientId() 
{
        return null;
}

Returns null; the radio group does not render as a tag and so doesn't have an id to share. RadioGroup implements org.apache.tapestry5.Field only so it can interact with the org.apache.tapestry5.ValidationTracker .

 public String getControlName() 
{
        return controlName;
}

 public String getLabel() 
{
        return label;
}

 public boolean isDisabled() 
{
        return disabled;
}

 public boolean isRequired() 
{
        return false;
}

Returns false; RadioGroup does not support declarative validation.

 final  void setupRender() 
{
        ComponentAction< RadioGroup > action = new Setup(formSupport.allocateControlName(clientId));
        formSupport.storeAndExecute(this, action);
        String submittedValue = tracker.getInput(this);
        final String selectedValue = submittedValue != null ? submittedValue : encoder.toClient(value);
        environment.push(RadioContainer.class, new RadioContainer()
        {
            public String getControlName()
            {
                return controlName;
            }
            public boolean isDisabled()
            {
                return disabled;
            }
            @SuppressWarnings("unchecked")
            public String toClient(Object value)
            {
                // TODO: Ensure that value is of the expected type?
                return encoder.toClient(value);
            }
            public boolean isSelected(Object value)
            {
                return TapestryInternalUtils.isEqual(encoder.toClient(value), selectedValue);
            }
        });
        formSupport.store(this, PROCESS_SUBMISSION);
}

Obtains the element name for the group, and stores a RadioContainer into the Environment (so that the Radio components can find it).