Bug 212478 Exception occurs when preview the table including a Autotext
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
if ( highlights != null )
			{
				for ( int i = 0; i < highlights.getRuleCount( ); i++ )
				{
					RuleDesign rule = highlights.getRule( i );
					if ( rule != null )
					{
						if ( rule.ifValueIsList( ) )
						{
							expressions.add( expressionUtil
									.createConditionExpression( rule
											.getTestExpression( ), rule
											.getOperator( ), rule
											.getValue1List( ) ) );
						}
						else
						{
							expressions.add( expressionUtil
									.createConditionalExpression( rule
											.getTestExpression( ), rule
											.getOperator( ), rule.getValue1( ),
											rule.getValue2( ) ) );
						}
					}
				}
			}
			MapDesign maps = item.getMap( );
			if ( maps != null )
			{
				for ( int i = 0; i < maps.getRuleCount( ); i++ )