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/api/impl/RenderTask.java
pageNumber ) );
		}
		if ( renderOptions == null )
		{
			throw new EngineException(
					"Render options have to be specified to render a report." );
		}
		doRender( pageNumber );
	}
	/**
	 * @param pageNumber
	 *            the page to be rendered
	 * @throws EngineException
	 *             throws exception if there is a rendering error
	 */
	protected void doRender( long pageNumber ) throws EngineException
	{
		
		EngineEmitterServices services = new EngineEmitterServices( this );
		services.setRenderOption( renderOptions );
		EngineConfig config = engine.getConfig( );
		if ( config != null )
			services
					.setEmitterConfig( engine.getConfig( ).getEmitterConfigs( ) );
		services.setRenderContext( context );
		services.setReportRunnable( runnable );
		
		usingParameterValues( );