public Set<String> getFieldNames() throws IndexException
   {
      final Set<String> fildsSet = new HashSet<String>();
      if (handler instanceof SearchIndex)
      {
         IndexReader reader = null;
         try
         {
            reader = ((SearchIndex)handler).getIndexReader();
            FieldInfos infos = ReaderUtil.getMergedFieldInfos(reader);
            for (FieldInfo info : infos)
            {
               fildsSet.add(info.name);
            }
         }
         catch (IOException e)
         {
            throw new IndexException(e.getLocalizedMessage(), e);
         }
         finally
         {
            try
            {
               if (reader != null)
               {
                  Util.closeOrRelease(reader);
               }
            }
            catch (IOException e)
            {
               throw new IndexException(e.getLocalizedMessage(), e);
            }
         }

      }
      return fildsSet;
   }
public Set < String > getFieldNames ( ) throws IndexException { final Set < String > fildsSet = new HashSet < String > ( ) ; if ( handler instanceof SearchIndex ) { IndexReader reader = null ; try { reader = ( ( SearchIndex ) handler ) . getIndexReader ( ) ; FieldInfos infos = ReaderUtil . getMergedFieldInfos ( reader ) ; for ( FieldInfo info : infos ) { fildsSet . add ( info . name ) ; } } catch ( IOException e ) { throw new IndexException ( e . getLocalizedMessage ( ) , e ) ; } finally { try { if ( reader != null ) { Util . closeOrRelease ( reader ) ; } } catch ( IOException e ) { throw new IndexException ( e . getLocalizedMessage ( ) , e ) ; } } } return fildsSet ; }
{@inheritDoc}