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
dteOpr, operand1List ) );
			}
			String operand1 = handle.getValue1( );
			String operand2 = handle.getValue2( );
			return new FilterDefinition( new ConditionalExpression( column,
					dteOpr, operand1, operand2 ) );
		}
		/**
		 * create a filter array given a filter condition handle iterator
		 * 
		 * @param iter
		 *            the iterator
		 * @return filter array
		 */
		private ArrayList createFilters( Iterator iter )
		{
			ArrayList filters = new ArrayList( );
			if ( iter != null )
			{
				while ( iter.hasNext( ) )
				{
					FilterConditionHandle filterHandle = (FilterConditionHandle) iter
							.next( );
					IFilterDefinition filter = createFilter( filterHandle );
					filters.add( filter );
				}
			}
			return filters;
		}
		/**