Bug 120345 Need a URL generator API from Engine
The Chart Engine needs the ability to generate a viewer URL from an ActionHandle, this can be provided by a Report Engine public API for instance. The URL should usable as is by the viewer without any additional change. The Chart Engine can take care of evaluating the expressions inside the ActionHandle before calling the Report Engine API if necessary.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
*/
	private IDataEngine dataEngine;
	/**
	 * utility used to create the report content
	 */
	private ReportExecutor executor;
	/**
	 * utility used to create the TOC
	 */
	private TOCBuilder tocBuilder;
	
	/**
	 * report runnable used to create the report content
	 */
	private IReportRunnable runnable;
	/**
	 * the report design contained in the report runnable
	 */
	private Report report;
	/**
	 * Global configuration variables
	 */
	private Map configs = new BirtHashMap( );
	/**
	 * Report parameters used to create the report content
	 */
	private Map params = new BirtHashMap( );
	private ReportDocumentWriter docWriter;
	/**
	 * app context