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
{
			values[i] = ( (ComputedColumnHandle) columnList.get( i ) ).getName( );
		}
		return values;
	}
	public void setReportElement( ReportElementHandle reportItem )
	{
		currentItem = reportItem;
	}
	protected SelectionListener expSelListener = new SelectionAdapter( ) {
		public void widgetSelected( SelectionEvent e )
		{
			if ( expression.getText( ).equals( VALUE_OF_THIS_DATA_ITEM )
					&& designHandle instanceof DataItemHandle )
			{
				expression.setText( DEUtil.getColumnExpression( ( (DataItemHandle) designHandle ).getResultSetColumn( ) ) );
			}
			else
			{
				String newValue = expression.getText( );
				String value = DEUtil.getExpression( getResultSetColumn( newValue ) );
				if ( value != null )
					newValue = value;
				expression.setText( newValue );
			}
			updateButtons( );
		}
	};
	/*
	 * (non-Javadoc)