Bug 213663 [2.2.2][2.3.0]Exception occurs when preview a datetime type data with highlight rule
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/api/DataAdapterUtil.java
try
			{
				if ( this.currentIterator == null )
					return null;
				if ( "__rownum".equalsIgnoreCase( arg0 ) ||
						"0".equalsIgnoreCase( arg0 ) )
				{
					return new Integer( this.currentIterator.getRowIndex( ) );
				}
				if ( "_outer".equalsIgnoreCase( arg0 ) )
				{
					return new JSResultIteratorObject( it.getParent( ) );
				}
				return this.currentIterator.getValue( arg0 );
			}
			catch ( BirtException e )
			{
				return null;
			}
		}
		/*
		 * @see org.mozilla.javascript.Scriptable#get(int, org.mozilla.javascript.Scriptable)
		 */
		public Object get( int index, Scriptable start )
		{
			return this.get( String.valueOf( index ), start );
		}
	}
}