Bug 136820 viewer supports render report in pdf format
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
throws ReportServiceException
	{
		try
		{
			IGetParameterDefinitionTask task = getParameterDefinitionTask( design );
			return task.getDefaultValue( parameterName );
		}
		catch ( EngineException e )
		{
			throw new ReportServiceException( e.getLocalizedMessage( ) );
		}
	}
	public Collection getParameterHandles( IViewerReportDesignHandle design,
			InputOptions options ) throws ReportServiceException
	{
		try
		{
			IGetParameterDefinitionTask parameterTask = getParameterDefinitionTask( design );
			if ( parameterTask == null )
				throw new ReportServiceException( "Can not get parameter task." ); 
			return parameterTask.getParameters( ).getContents( );
		}
		catch ( EngineException e )
		{
			throw new ReportServiceException( e.getLocalizedMessage( ) );
		}
	}
	public void setContext( Object context, InputOptions options )
	{
		HttpServletRequest request = (HttpServletRequest) options