Пример #1
0
 public override bool IsEmpty() /* throws Net.Vpc.Upa.Exceptions.UPAException */
 {
     if (!context.GetPersistenceUnit().GetPersistenceGroup().CurrentSessionExists())
     {
         if (sessionAwareInstance == null)
         {
             sessionAwareInstance = context.GetPersistenceUnit().GetPersistenceGroup().GetContext().MakeSessionAware <Net.Vpc.Upa.Impl.Persistence.DefaultQuery>(this);
         }
         return(sessionAwareInstance.IsEmpty());
     }
     try {
         Net.Vpc.Upa.Impl.Persistence.QueryExecutor queryExecutor = ExecuteQuery(Net.Vpc.Upa.Impl.Util.Filters.Fields2.READ);
         Net.Vpc.Upa.Persistence.QueryResult        r             = null;
         try {
             r = queryExecutor.GetQueryResult();
             return(!r.HasNext());
         } finally {
             if (r != null)
             {
                 r.Close();
             }
         }
     } catch (System.Exception e) {
         throw new Net.Vpc.Upa.Exceptions.FindException(e, new Net.Vpc.Upa.Types.I18NString("FindFailed"));
     }
 }
Пример #2
0
 protected internal virtual Net.Vpc.Upa.Impl.Persistence.QueryExecutor ExecuteQuery(Net.Vpc.Upa.Filters.FieldFilter fieldFilter)
 {
     //        if (result != null) {
     //            throw new FindException("QueryAlreadyExecutedException");
     //        }
     Net.Vpc.Upa.Impl.Persistence.QueryExecutor queryExecutor = CreateNativeSQL(fieldFilter);
     //        DefaultResultMetaData m = new DefaultResultMetaData();
     //        for (NativeField x : queryExecutor.getFields()) {
     //            m.addField(x.getName(), x.getTypeTransform(), x.getField());
     //        }
     //        this.metadata = m;
     queryExecutor.Execute();
     result = queryExecutor.GetQueryResult();
     return(queryExecutor);
 }
Пример #3
0
 protected internal override void LoadingFinished()
 {
     queryExecutor.GetQueryResult().Close();
     queryExecutor.GetConnection().RemoveCloseListener(closeListener);
 }
Пример #4
0
 protected internal QueryResultLazyList(Net.Vpc.Upa.Impl.Persistence.QueryExecutor _queryExecutor)  : base(null)
 {
     this.queryExecutor = _queryExecutor;
     this.@base         = new Net.Vpc.Upa.Impl.Persistence.QueryResultReader <R>(queryExecutor.GetQueryResult(), this);
     closeListener      = new Net.Vpc.Upa.Impl.Persistence.CloseListenerImpl <?>(this);
     queryExecutor.GetConnection().AddCloseListener(closeListener);
 }