Bug 133780 Execution sequence of valueExpr(DataItem) and onCreate() is not correct.
In the attached design. There is a DataItem in the table footer that I used to do a sum of the "Amount" column. In the test, I write the onCreate() method as: params["amount"]=Total.sum(row["AMOUNT"]); It passes the aggregation value to a parameter. In the "valueExpr" I write as: "AMOUNT:" + params["amount"] The expression is expected to export the sum. Actual output is: AMOUNT:null Followings are the definitions from Rom Text Spec & Rom Scripting Spec, valueExpr usually should be evalated after the onCreate() method. DataItem.valueExpr: The expression is usually evaluated when the report is rendered, not in the Factory, though it may be evaluated in the Factory also. onCreate: Executed when the element is created in the Factory. Called after the item is created, but before the item is saved to the report document file.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ImageItemExecutor.java
public void execute( ReportItemDesign item, IContentEmitter emitter )
	{
		assert item instanceof ImageItemDesign;
		ImageItemDesign imageItem = (ImageItemDesign) item;
		IImageContent imageContent = report.createImageContent( );
		IContent parent = context.getContent( );
		context.pushContent( imageContent );
		openResultSet( item );
		accessQuery( item, emitter );
		initializeContent( parent, item, imageContent );
		
		processAction( item, imageContent );
		processBookmark( item, imageContent );
		processStyle( item, imageContent );
		processVisibility( item, imageContent );
		handleImage( imageItem, imageContent );
		
		if ( context.isInFactory( ) )
		{
			ImageScriptExecutor.handleOnCreate( (ImageContent) imageContent,
					context );
		}
		startTOCEntry( imageContent );
		
		if ( emitter != null )
		{
			emitter.startImage( imageContent );
		}
		finishTOCEntry( );
		closeResultSet( );