Bug 209126 DataException throws out when set highlight condition in sub-report[0302]
Description: Set highlight condition in sub-report, when "select value..." in the highlight dialog, DataException throws out. Build version:2.3.0.v20071108-0800 Steps to reproduce: 1.Get the attached report design file, which contains a sub-report. 2.Select the inner table, and then go to "highlight" tab in the property editor view to set a highlight rule. When click "select value...", DataException throws out. Error: The expression's value can not be retrieved. An error happened in data type conversion. Can not convert the value of org.eclipse.birt.data.engine.script.DataExceptionMocker@79c17b to Integer type.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/HighlightRuleBuilder.java
if ( handle != null && handle.getStyle( ) != null )
		{
			stylesChooser.setText( handle.getStyle( ).getName( ) );
		}
		else
		{
			stylesChooser.setText( NONE_DISPLAY_TEXT );
		}
	}
	private void fillExpression( Combo control )
	{
		String te = "";
		if ( handle != null )
		{
			te = handle.getTestExpression( );
		}
		if ( designHandle instanceof DataItemHandle
				&& ( (DataItemHandle) designHandle ).getResultSetColumn( ) != null )
		{
			control.add( VALUE_OF_THIS_DATA_ITEM );
		}
		if ( control.getItemCount( ) == 0 )
		{
			control.add( DEUtil.resolveNull( null ) );
			control.select( control.getItemCount( ) - 1 );
		}
	}
	/**
	 * Refreshes the OK button state.
	 *