public virtual Net.Vpc.Upa.Persistence.ResultMetaData CreateResultMetaData(Net.Vpc.Upa.Expressions.Expression baseExpression, Net.Vpc.Upa.Filters.FieldFilter fieldFilter, System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryStatement> context)
 {
     baseExpression = Net.Vpc.Upa.Impl.Uql.Util.UQLUtils.ParseUserExpressions(baseExpression, pu);
     Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData m = new Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData();
     if (baseExpression is Net.Vpc.Upa.Expressions.NonQueryStatement)
     {
         m.SetStatement((Net.Vpc.Upa.Expressions.EntityStatement)baseExpression);
         m.AddField(new Net.Vpc.Upa.Impl.Persistence.DefaultResultField(null, "result", Net.Vpc.Upa.Types.TypesFactory.INT, null, null));
         return(m);
     }
     else
     {
         Net.Vpc.Upa.Expressions.QueryStatement q = (Net.Vpc.Upa.Expressions.QueryStatement)baseExpression;
         if (q is Net.Vpc.Upa.Expressions.Select)
         {
             Net.Vpc.Upa.Expressions.Select qs = (Net.Vpc.Upa.Expressions.Select)q;
             if ((qs.GetFields()).Count == 0)
             {
                 if (!Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(qs.GetEntityAlias()))
                 {
                     qs.Field(new Net.Vpc.Upa.Expressions.Var(qs.GetEntityAlias()));
                 }
                 else if (qs.GetEntityName() != null)
                 {
                     qs.Field(new Net.Vpc.Upa.Expressions.Var(qs.GetEntityName()));
                 }
                 else
                 {
                     throw new Net.Vpc.Upa.Exceptions.UPAException("MissingAlias");
                 }
                 foreach (Net.Vpc.Upa.Expressions.JoinCriteria joinCriteria in qs.GetJoins())
                 {
                     if (!Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(joinCriteria.GetEntityAlias()))
                     {
                         qs.Field(new Net.Vpc.Upa.Expressions.Var(joinCriteria.GetEntityAlias()));
                     }
                     else if (joinCriteria.GetEntityName() != null)
                     {
                         qs.Field(new Net.Vpc.Upa.Expressions.Var(joinCriteria.GetEntityName()));
                     }
                     else
                     {
                         throw new Net.Vpc.Upa.Exceptions.UPAException("MissingAlias");
                     }
                 }
             }
             System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryField>     oldFields  = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryField>(q.GetFields());
             System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryField>     newFields  = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryField>();
             System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField>    newResults = new System.Collections.Generic.List <Net.Vpc.Upa.Persistence.ResultField>();
             System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryStatement> context2   = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryStatement>();
             Net.Vpc.Upa.Impl.FwkConvertUtils.ListAddRange(context2, context);
             context2.Add(q);
             foreach (Net.Vpc.Upa.Expressions.QueryField f in oldFields)
             {
                 Net.Vpc.Upa.Expressions.Expression expression = f.GetExpression();
                 string oldAlias = f.GetAlias();
                 System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> newVal = CreateResultFields(expression, oldAlias, fieldFilter, context2);
                 Net.Vpc.Upa.Impl.FwkConvertUtils.ListAddRange(newResults, newVal);
                 if ((newVal).Count == 0)
                 {
                 }
                 else if ((newVal).Count == 1)
                 {
                     f.SetExpression(newVal[0].GetExpression());
                     f.SetAlias(Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(oldAlias) ? oldAlias : newVal[0].GetAlias());
                     newFields.Add(f);
                 }
                 else
                 {
                     foreach (Net.Vpc.Upa.Persistence.ResultField nf in newVal)
                     {
                         Net.Vpc.Upa.Expressions.QueryField f2 = new Net.Vpc.Upa.Expressions.QueryField(Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(oldAlias) ? oldAlias : nf.GetAlias(), nf.GetExpression());
                         newFields.Add(f2);
                     }
                 }
             }
             qs.ClearFields();
             foreach (Net.Vpc.Upa.Expressions.QueryField newField in newFields)
             {
                 qs.Field(newField);
             }
             m.SetStatement(qs);
             foreach (Net.Vpc.Upa.Persistence.ResultField newResult in newResults)
             {
                 m.AddField(newResult);
             }
         }
         else if (q is Net.Vpc.Upa.Expressions.Union)
         {
             System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryStatement> context2 = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryStatement>();
             Net.Vpc.Upa.Impl.FwkConvertUtils.ListAddRange(context2, context);
             context2.Add(q);
             Net.Vpc.Upa.Expressions.Union         u0     = (Net.Vpc.Upa.Expressions.Union)q;
             Net.Vpc.Upa.Expressions.Union         u      = new Net.Vpc.Upa.Expressions.Union();
             Net.Vpc.Upa.Persistence.ResultField[] fields = null;
             foreach (Net.Vpc.Upa.Expressions.QueryStatement qs in u0.GetQueryStatements())
             {
                 Net.Vpc.Upa.Persistence.ResultMetaData resultMetaData = CreateResultMetaData(qs, fieldFilter, context2);
                 u.Add((Net.Vpc.Upa.Expressions.QueryStatement)resultMetaData.GetStatement());
                 System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> f = resultMetaData.GetFields();
                 if (fields == null)
                 {
                     fields = f.ToArray();
                 }
                 else
                 {
                     if (fields.Length != (f).Count)
                     {
                         throw new Net.Vpc.Upa.Exceptions.UPAException("InvalidUnion");
                     }
                     for (int i = 0; i < fields.Length; i++)
                     {
                         fields[i] = Merge(fields[i], f[i]);
                     }
                 }
             }
             m.SetStatement(u);
             if (fields != null)
             {
                 foreach (Net.Vpc.Upa.Persistence.ResultField field in fields)
                 {
                     m.AddField(field);
                 }
             }
         }
         else
         {
             throw new System.Exception();
         }
     }
     return(m);
 }
Exemple #2
0
 public virtual object CreateResult(Net.Vpc.Upa.Impl.Persistence.Result.ResultColumn[] row, Net.Vpc.Upa.Persistence.ResultMetaData metadata)
 {
     System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> fields = metadata.GetFields();
     Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData d = (Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData)metadata;
     string[] bindings = (string[])Net.Vpc.Upa.Impl.FwkConvertUtils.GetMapValue <string, object>(d.GetProperties(), CACHE_KEY);
     if (bindings == null)
     {
         bindings = new string[(fields).Count];
         for (int i = 0; i < (fields).Count; i++)
         {
             Net.Vpc.Upa.Persistence.ResultField field = fields[i];
             Net.Vpc.Upa.Expressions.Expression  ss    = field.GetExpression();
             string binding = ss == null ? "null" : ss.ToString();
             bindings[i] = binding;
         }
         d.GetProperties()[CACHE_KEY] = bindings;
     }
     object[] allRet = new object[(fields).Count];
     for (int i = 0; i < allRet.Length; i++)
     {
         allRet[i] = row[i].GetValue();
     }
     return(allRet);
 }
 public override T Parse(Net.Vpc.Upa.Persistence.QueryResult result) /* throws Net.Vpc.Upa.Exceptions.UPAException */
 {
     System.Collections.Generic.IDictionary <string, object> groupValues = new System.Collections.Generic.Dictionary <string, object>();
     Net.Vpc.Upa.Impl.Persistence.Result.ResultColumn[]      values      = new Net.Vpc.Upa.Impl.Persistence.Result.ResultColumn[(metaData.GetFields()).Count];
     for (int i = 0; i < values.Length; i++)
     {
         values[i] = new Net.Vpc.Upa.Impl.Persistence.Result.ResultColumn();
     }
     foreach (Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo typeInfo in typeInfos)
     {
         typeInfo.entityObject = null;
         typeInfo.entityRecord = null;
         typeInfo.entityResult = null;
     }
     foreach (Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo typeInfo in typeInfos)
     {
         if (typeInfo.entity == null)
         {
             foreach (Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo f in typeInfo.allFields)
             {
                 object fieldValue = result.Read <T>(f.dbIndex);
                 groupValues[f.nativeField.GetFullBinding()] = fieldValue;
                 groupValues[f.nativeField.GetExprString()]  = fieldValue;
                 UpdateRow(values, f, f.nativeField.GetExprString(), fieldValue);
             }
         }
         else if (typeInfo.leadPrimaryField == null)
         {
             if (typeInfo.record)
             {
                 object             entityObject = null;
                 Net.Vpc.Upa.Record entityRecord = typeInfo.entityFactory == null ? ((Net.Vpc.Upa.Record)(ofactory.CreateObject <Net.Vpc.Upa.Record>(typeof(Net.Vpc.Upa.Record)))) : typeInfo.entityFactory.CreateRecord();
                 typeInfo.entityObject = entityObject;
                 typeInfo.entityRecord = entityRecord;
                 typeInfo.entityResult = entityRecord;
             }
             else
             {
                 object             entityObject = typeInfo.entityFactory.CreateObject <R>();
                 Net.Vpc.Upa.Record entityRecord = typeInfo.entityConverter.ObjectToRecord(entityObject, true);
                 typeInfo.entityObject = entityObject;
                 typeInfo.entityRecord = entityRecord;
                 typeInfo.entityResult = entityObject;
             }
             groupValues[typeInfo.binding] = typeInfo.entityResult;
             UpdateRow(values, typeInfo, typeInfo.binding, typeInfo.entityResult);
             foreach (Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo f in typeInfo.allFields)
             {
                 object fieldValue = result.Read <T>(f.dbIndex);
                 groupValues[f.nativeField.GetFullBinding()] = fieldValue;
                 typeInfo.entityRecord.SetObject(f.name, fieldValue);
                 UpdateRow(values, f, f.nativeField.GetExprString(), fieldValue);
             }
         }
         else
         {
             object leadPK = result.Read <T>(typeInfo.leadPrimaryField.dbIndex);
             if (leadPK != null)
             {
                 //create new instances
                 if (typeInfo.record)
                 {
                     typeInfo.entityRecord = typeInfo.entityFactory == null ? ((Net.Vpc.Upa.Record)(ofactory.CreateObject <Net.Vpc.Upa.Record>(typeof(Net.Vpc.Upa.Record)))) : typeInfo.entityFactory.CreateRecord();
                     typeInfo.entityResult = typeInfo.entityRecord;
                 }
                 else
                 {
                     object             entityObject = typeInfo.entityFactory.CreateObject <R>();
                     Net.Vpc.Upa.Record entityRecord = typeInfo.entityConverter.ObjectToRecord(entityObject, true);
                     typeInfo.entityObject = entityObject;
                     typeInfo.entityRecord = entityRecord;
                     typeInfo.entityResult = entityObject;
                 }
                 groupValues[typeInfo.binding] = typeInfo.entityResult;
                 UpdateRow(values, typeInfo, typeInfo.binding, typeInfo.entityResult);
                 foreach (Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo f in typeInfo.allFields)
                 {
                     object fieldValue = result.Read <T>(f.dbIndex);
                     groupValues[f.nativeField.GetFullBinding()] = fieldValue;
                     UpdateRow(values, f, f.nativeField.GetExprString(), fieldValue);
                     typeInfo.entityRecord.SetObject(f.name, fieldValue);
                 }
                 if (loadManyToOneRelations)
                 {
                     foreach (Net.Vpc.Upa.Relationship relationship in typeInfo.manyToOneRelations)
                     {
                         object extractedId = relationship.ExtractIdByForeignFields(typeInfo.entityRecord);
                         if (extractedId != null)
                         {
                             object @value = loader.LoadObject(relationship.GetTargetEntity(), extractedId, relationAsRecord, loaderContext);
                             typeInfo.entityRecord.SetObject(relationship.GetSourceRole().GetEntityField().GetName(), @value);
                             groupValues[typeInfo.binding + "." + relationship.GetSourceRole().GetEntityField().GetName()] = @value;
                         }
                     }
                 }
             }
             else
             {
                 typeInfo.entityObject = null;
                 typeInfo.entityRecord = null;
             }
         }
     }
     foreach (Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo typeInfo in typeInfos)
     {
         if (typeInfo.parentBinding != null)
         {
             Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo pp = Net.Vpc.Upa.Impl.FwkConvertUtils.GetMapValue <string, Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo>(bindingToTypeInfos, typeInfo.parentBinding);
             if (pp == null)
             {
             }
             else if (pp.entityRecord != null)
             {
                 pp.entityRecord.SetObject(typeInfo.bindingName, typeInfo.entityResult);
             }
         }
     }
     if (updatable)
     {
         foreach (Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo typeInfo in typeInfos)
         {
             if (typeInfo.record)
             {
                 Net.Vpc.Upa.Impl.Persistence.Result.QueryResultUpdaterPropertyChangeListener li = new Net.Vpc.Upa.Impl.Persistence.Result.QueryResultUpdaterPropertyChangeListener(typeInfo, result);
                 typeInfo.entityRecord.AddPropertyChangeListener(li);
             }
             else
             {
                 typeInfo.entityUpdatable      = Net.Vpc.Upa.Impl.Util.PlatformUtils.CreateObjectInterceptor <object>(typeInfo.entityType, new Net.Vpc.Upa.Impl.Persistence.Result.UpdatableObjectInterceptor(typeInfo, typeInfo.entityObject, result));
                 groupValues[typeInfo.binding] = typeInfo.entityUpdatable;
                 int index = typeInfo.allFields[0].nativeField.GetIndex();
                 if (values[index].GetValue() == typeInfo.entityType)
                 {
                     values[index].SetValue(typeInfo.entityUpdatable);
                 }
             }
         }
     }
     return((T)this.resultBuilder.CreateResult(values, metaData));
 }
 public DefaultObjectQueryResultLazyList(Net.Vpc.Upa.Impl.Persistence.QueryExecutor queryExecutor, bool loadManyToOneRelations, bool defaultsToRecord, bool relationAsRecord, bool supportCache, bool updatable, Net.Vpc.Upa.Impl.Persistence.Result.QueryResultRelationLoader loader, Net.Vpc.Upa.Impl.Persistence.Result.QueryResultItemBuilder resultBuilder)  : base(queryExecutor)
 {
     this.resultBuilder          = resultBuilder;
     this.loader                 = loader;
     this.defaultsToRecord       = defaultsToRecord;
     this.relationAsRecord       = relationAsRecord;
     this.loadManyToOneRelations = loadManyToOneRelations;
     metaData = queryExecutor.GetMetaData();
     hints    = queryExecutor.GetHints();
     if (hints == null)
     {
         hints = new System.Collections.Generic.Dictionary <string, object>();
     }
     else
     {
         hints = new System.Collections.Generic.Dictionary <string, object>(hints);
     }
     if (supportCache)
     {
         Net.Vpc.Upa.Impl.Util.CacheMap <Net.Vpc.Upa.NamedId, object> sharedCache = (Net.Vpc.Upa.Impl.Util.CacheMap <Net.Vpc.Upa.NamedId, object>)Net.Vpc.Upa.Impl.FwkConvertUtils.GetMapValue <string, object>(hints, "queryCache");
         if (sharedCache == null)
         {
             sharedCache         = new Net.Vpc.Upa.Impl.Util.CacheMap <Net.Vpc.Upa.NamedId, object>(1000);
             hints["queryCache"] = sharedCache;
         }
         referencesCache = sharedCache;
     }
     loaderContext = new Net.Vpc.Upa.Impl.Persistence.Result.LoaderContext(referencesCache, hints);
     System.Collections.Generic.Dictionary <string, Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo> bindingToTypeInfos0 = new System.Collections.Generic.Dictionary <string, Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo>();
     ofactory = Net.Vpc.Upa.UPA.GetPersistenceUnit().GetFactory();
     Net.Vpc.Upa.Impl.Persistence.NativeField[] fields = queryExecutor.GetFields();
     for (int i = 0; i < fields.Length; i++)
     {
         Net.Vpc.Upa.Impl.Persistence.NativeField      nativeField = fields[i];
         Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo f           = new Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo();
         f.dbIndex     = i;
         f.nativeField = nativeField;
         f.name        = nativeField.GetName();
         string gn = nativeField.GetGroupName();
         if (gn == null)
         {
             gn = nativeField.GetExprString();
         }
         Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo t = Net.Vpc.Upa.Impl.FwkConvertUtils.GetMapValue <string, Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo>(bindingToTypeInfos0, gn);
         if (t == null)
         {
             if (nativeField.GetField() != null)
             {
                 t        = new Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo(gn, nativeField.GetField().GetEntity());
                 t.record = gn.Contains(".") ? relationAsRecord : defaultsToRecord;
                 bindingToTypeInfos0[gn] = t;
             }
             else
             {
                 t        = new Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo(gn, null);
                 t.record = false;
                 //n.contains(".") ? relationAsRecord : defaultsToRecord;
                 bindingToTypeInfos0[gn] = t;
             }
         }
         //                if(!bindingToTypeInfos0.containsKey(nativeField.getExprString())) {
         //                    bindingToTypeInfos0.put(nativeField.getExprString(), t);
         //                }else{
         //                    System.out.println("why");
         //                }
         f.field = nativeField.GetField();
         if (loadManyToOneRelations)
         {
             if (f.field != null)
             {
                 if (f.field.GetDataType() is Net.Vpc.Upa.Types.ManyToOneType)
                 {
                     Net.Vpc.Upa.Entity r = ((Net.Vpc.Upa.Types.ManyToOneType)f.field.GetDataType()).GetTargetEntity();
                     f.referencedEntity = r;
                 }
                 foreach (Net.Vpc.Upa.Relationship relationship in f.field.GetManyToOneRelationships())
                 {
                     if (relationship.GetSourceRole().GetEntityField() != null)
                     {
                         t.manyToOneRelations.Add(relationship);
                     }
                 }
             }
         }
         f.typeInfo = t;
         t.allFields.Add(f);
         if (t.leadPrimaryField == null && f.nativeField.GetField() != null && f.nativeField.GetField().IsId())
         {
             t.leadPrimaryField = f;
         }
         if (t.leadField == null)
         {
             t.leadField = f;
         }
         f.setterMethodName           = Net.Vpc.Upa.Impl.Util.PlatformUtils.SetterName(nativeField.GetName());
         t.fields[f.setterMethodName] = f;
     }
     bindingToTypeInfos = bindingToTypeInfos0;
     typeInfos          = (bindingToTypeInfos0).Values.ToArray();
     // all indexes to fill with values from the query
     System.Collections.Generic.ISet <int?> allIndexes = new System.Collections.Generic.HashSet <int?>();
     for (int i = 0; i < (metaData.GetFields()).Count; i++)
     {
         allIndexes.Add(i);
     }
     // map expression to relative TypeInfo/FieldInfo
     System.Collections.Generic.IDictionary <string, object> visitedIndexes = new System.Collections.Generic.Dictionary <string, object>();
     for (int i = 0; i < typeInfos.Length; i++)
     {
         Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo typeInfo = typeInfos[i];
         //            if (aliasName.equals(typeInfo.binding)) {
         //                entityIndex = i;
         //            }
         typeInfo.infosArray = typeInfo.allFields.ToArray();
         typeInfo.update     = false;
         foreach (Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo field in typeInfo.infosArray)
         {
             if (!field.nativeField.IsExpanded() && field.nativeField.GetIndex() >= 0)
             {
                 field.update = true;
                 field.indexesToUpdate.Add(field.nativeField.GetIndex());
                 allIndexes.Remove(field.nativeField.GetIndex());
                 visitedIndexes[field.nativeField.GetExprString()] = field;
             }
         }
         if (typeInfo.entity == null)
         {
             typeInfo.update = true;
         }
         else
         {
             System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> fields1 = metaData.GetFields();
             for (int i1 = 0; i1 < (fields1).Count; i1++)
             {
                 Net.Vpc.Upa.Persistence.ResultField resultField = fields1[i1];
                 if (resultField.GetExpression().ToString().Equals(typeInfo.binding))
                 {
                     typeInfo.update = true;
                     typeInfo.indexesToUpdate.Add(i1);
                     allIndexes.Remove(i1);
                     visitedIndexes[typeInfo.binding] = typeInfo;
                     break;
                 }
             }
         }
     }
     //when an expression is to be expanded twice, implementation ignores second expansion
     // so we must find the equivalent expression index to handle
     foreach (int?remaining in allIndexes)
     {
         string k = metaData.GetFields()[(remaining).Value].GetExpression().ToString();
         object o = Net.Vpc.Upa.Impl.FwkConvertUtils.GetMapValue <string, object>(visitedIndexes, k);
         if (o is Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo)
         {
             ((Net.Vpc.Upa.Impl.Persistence.Result.TypeInfo)o).indexesToUpdate.Add(remaining);
         }
         else if (o is Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo)
         {
             ((Net.Vpc.Upa.Impl.Persistence.Result.FieldInfo)o).indexesToUpdate.Add(remaining);
         }
         else
         {
             throw new Net.Vpc.Upa.Exceptions.UPAException("Unsupported");
         }
     }
     this.updatable = updatable;
 }
 public virtual object CreateResult(Net.Vpc.Upa.Impl.Persistence.Result.ResultColumn[] row, Net.Vpc.Upa.Persistence.ResultMetaData metadata)
 {
     System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> fields = metadata.GetFields();
     Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData d = (Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData)metadata;
     string[][] preferredNameAndBinding = (string[][])Net.Vpc.Upa.Impl.FwkConvertUtils.GetMapValue <string, object>(d.GetProperties(), CACHE_KEY);
     if (preferredNameAndBinding == null)
     {
         preferredNameAndBinding = (string[][])Net.Vpc.Upa.Impl.FwkConvertUtils.CreateMultiArray(typeof(string), (fields).Count, 2);
         for (int i = 0; i < (fields).Count; i++)
         {
             Net.Vpc.Upa.Persistence.ResultField field = fields[i];
             Net.Vpc.Upa.Expressions.Expression  ss    = field.GetExpression();
             string binding       = ss == null ? "null" : ss.ToString();
             string preferredName = binding;
             if (preferredName.IndexOf('.') >= 0)
             {
                 preferredName = preferredName.Substring(preferredName.LastIndexOf('.') + 1);
             }
             string alias = field.GetAlias();
             if (!Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(alias))
             {
                 preferredName = alias;
             }
             preferredNameAndBinding[i][0] = preferredName;
             preferredNameAndBinding[i][1] = binding;
         }
         d.GetProperties()[CACHE_KEY] = preferredNameAndBinding;
     }
     if ((fields).Count == 1 && row[0].GetValue() is Net.Vpc.Upa.Record)
     {
         return(row[0].GetValue());
     }
     Net.Vpc.Upa.Record r = new Net.Vpc.Upa.Impl.DefaultRecord();
     for (int i = 0; i < (fields).Count; i++)
     {
         string preferredName = preferredNameAndBinding[i][0];
         r.SetObject(preferredName, row[i].GetValue());
     }
     return(r);
 }