Bug 192789 Support to render reportlet using bookmark in frameset servlet.
Description: Support to render reportlet using bookmark in frameset servlet. At present, only run and preview servlet support __isreportlet&__bookmark to generate reportlet.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/AbstractGetPageActionHandler.java
protected long __pageNumber;
	protected long __totalPageNumber;
	protected boolean __isCompleted = true;
	protected boolean __useBookmark = false;
	protected String __bookmark;
	protected boolean __svgFlag;
	protected ByteArrayOutputStream __page = null;
	protected ArrayList __activeIds = null;
	/**
	 * 
	 * @param bean
	 * @return
	 */
	abstract protected String __getReportDocument( );
	/**
	 * 
	 * @param docName
	 * @throws RemoteException
	 */
	abstract protected void __checkDocumentExists( ) throws Exception;
	/**
	 * 
	 * @param context
	 * @param operation
	 * @param response
	 */
	public AbstractGetPageActionHandler( IContext context, Operation operation,
			GetUpdatedObjectsResponse response )
	{
		super( context, operation, response );