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/TextItemExecutor.java
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.birt.report.engine.content.IContent;
import org.eclipse.birt.report.engine.content.IForeignContent;
import org.eclipse.birt.report.engine.content.ILabelContent;
import org.eclipse.birt.report.engine.content.impl.ForeignContent;
import org.eclipse.birt.report.engine.content.impl.LabelContent;
import org.eclipse.birt.report.engine.emitter.IContentEmitter;
import org.eclipse.birt.report.engine.ir.Expression;
import org.eclipse.birt.report.engine.ir.IReportItemVisitor;
import org.eclipse.birt.report.engine.ir.ReportItemDesign;
import org.eclipse.birt.report.engine.ir.TextItemDesign;
import org.eclipse.birt.report.engine.script.internal.TextItemScriptExecutor;
/**
 * <code>DataItemExecutor</code> is a concrete subclass of
 * <code>StyledItemExecutor</code> that manipulates label/text items.
 * 
 * @version $Revision: 1.28 $ $Date: 2005/12/03 02:01:49 $
 */
public class TextItemExecutor extends QueryItemExecutor
{
	/**
	 * constructor
	 * 
	 * @param context
	 *            the executor context
	 * @param visitor
	 *            the report executor visitor
	 */