Bug 141227 Prompt text on cascading parameter group can't be preview
Details: Prompt text on cascading parameter group can't be preview Description: In RC2, the prompt text on cascading parameter was planned to finished. But now it has not been used. Will it be delay to RC3?
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/presentation/aggregation/parameter/ParameterGroupFragment.java
* Get report parameters from engine.
	 * 
	 * @param request
	 *            incoming http request
	 * @param response
	 *            http response
	 * @return target jsp pages
	 * @exception ServletException
	 * @exception IOException
	 */
	protected void doService( HttpServletRequest request,
			HttpServletResponse response ) throws ServletException, IOException
	{
		ViewerAttributeBean attrBean = (ViewerAttributeBean) request
				.getAttribute( IBirtConstants.ATTRIBUTE_BEAN );
		assert attrBean != null;
		assert parameterGroup != null;
		ParameterGroupBean parameterGroupBean = new ParameterGroupBean(
				parameterGroup );
		attrBean.setParameterBean( parameterGroupBean );
		
		String displayName = parameterGroup.getPromptText( );
		displayName = ( displayName == null || displayName.length( ) <= 0 )
				? parameterGroup.getDisplayName( )
				: displayName;
		displayName = ( displayName == null || displayName.length( ) <= 0 )
				? parameterGroup.getName( )
				: displayName;
		displayName = ParameterAccessor.htmlEncode( displayName );
		parameterGroupBean.setDisplayName( displayName );