Bug 207897 [Automation][Regression]A DataException is thrown out when preview reportdesign
Description: A DataException is thrown out when preview reportdesign Test Date: 20071030 Test Build: BIRT2.2.2 v20071029 Step to reproduce: 1. Use the reportdesign attached 2. Preview it Expect result: Report can be previewed without any exception. Actual result: A DataException is thrown out.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
{
		return design;
	}
	
	public void setItemDesign(ReportItemDesign design)
	{
		this.design = design;
	}
	/**
	 * @param obj
	 */
	public void pushHandle( DesignElementHandle obj )
	{
		reportHandles.push( obj );
	}
	/**
	 * @return
	 */
	public DesignElementHandle popHandle( )
	{
		return (DesignElementHandle) reportHandles.pop( );
	}
	/**
	 * @return
	 */
	public DesignElementHandle getHandle( )
	{
		if ( reportHandles.empty( ) )
		{
			return null;