internal static CriteriaNode CreateCriteriaNode <T>(params Expression <Func <T, bool> >[] expressions) where T : new() { if (expressions.Length == 0) { return(new CriteriaNode(null)); } var nodes = new List <CriteriaNode>(); foreach (var exp in expressions) { var node = new CriteriaNode(null); VisitExpression <T>(exp, node); nodes.Add(node); } if (nodes.Count == 1) { return(nodes[0]); } var firstNode = nodes[0]; nodes.RemoveAt(0); return(MergeCriteriaNodes(firstNode, nodes)); }
private DataTable RetrieveTable(string commandText, CriteriaNode criteriaNode) { try { Command.Start(); commandText = CreateSqlTextByCriteriaNode(commandText, criteriaNode); Command.CommandText = EnclosePropertyInQuotation(commandText); using (var reader = Command.ExecuteReader()) { var table = new DataTable(); table.Load(reader); return(table); } } catch (Exception ex) { throw CreateEasylinkException(Command.CommandText, ex); } }
private void DeleteAll <T>(CriteriaNode criteriaNode) where T : new() { var deleteSql = ClassConfigContainer.FindDeleteSql(typeof(T)); try { Command.Start(); var criterias = criteriaNode.SearchAll(); if (criterias.Count > 0) { UpdateCriteria <T>(criterias); } if (Shared.IsAuditable <T>()) { var originalObjects = RetrieveAll <T>(criteriaNode); var dict = new Dictionary <T, string>(); foreach (var original in originalObjects) { string updateSql = ClassConfigContainer.FindUpdateSql1(typeof(T)); var propertyParameters = ParametersCreator.CreatePropertyParameters(ParameterPrefix, original, ref updateSql); string auditText = Auditor.AuditDelete(original, propertyParameters); dict[original] = auditText; } ExecuteNonQuery(deleteSql, criteriaNode); foreach (var original in originalObjects) { InsertAuditRecord(original, DbOperation.Delete, dict[original]); } } else { ExecuteNonQuery(deleteSql, criteriaNode); } } catch (Exception ex) { throw CreateEasylinkException(deleteSql, ex); } }
private void ExecuteNonQuery(string commandText, CriteriaNode criteriaNode) { try { Command.Start(); Command.CommandText = CreateSqlTextByCriteriaNode(commandText, criteriaNode); Command.ExecuteNonQuery(); } catch (Exception ex) { throw CreateEasylinkException(Command.CommandText, ex); } }
private List <T> RetrieveAll <T>(CriteriaNode criteriaNode) where T : new() { var selectSql = ClassConfigContainer.FindSelectSql <T>(); var criterias = criteriaNode.SearchAll(); if (criterias.Count > 0) { UpdateCriteria <T>(criterias); } var table = RetrieveTable(selectSql, criteriaNode); return(ObjectMapper.MapTableToList <T>(table)); }
private string CreateSqlTextByCriteriaNode(string sql, CriteriaNode criteriaNode) { var sb = new StringBuilder(); sb.AppendLine(sql); var whereClause = CreateWhereClause(criteriaNode); if (!String.IsNullOrEmpty(whereClause)) { sb.AppendLine(" WHERE " + whereClause); } return(sb.ToString()); }
private T RetrieveObject <T>(CriteriaNode criteriaNode) where T : new() { var list = RetrieveAll <T>(criteriaNode); if (list.Count == 0) { return(default(T)); } if (list.Count > 1) { throw new ServerException("More than one objects matched with criteria are retrieved."); } return(list[0]); }
private static CriteriaNode MergeCriteriaNodes(CriteriaNode criteriaNode, IList <CriteriaNode> nodes) { if (nodes.Count == 0) { return(criteriaNode); } var mergedNode = new CriteriaNode(); mergedNode.LeftChild = criteriaNode; mergedNode.RightChild = nodes[0]; mergedNode.NodeType = CriteriaNodeType.AND; nodes.RemoveAt(0); return(MergeCriteriaNodes(mergedNode, nodes)); }
private string CreateWhereClause(CriteriaNode criteriaNode) { var criterias = criteriaNode.SearchAll(); if (criterias.Count == 0) { return(string.Empty); } if (criteriaNode.Criteria != null) { return(CreateCondition(criteriaNode.Criteria)); } return(string.Format("({0} {1} {2})", CreateWhereClause(criteriaNode.LeftChild), criteriaNode.NodeType, CreateWhereClause(criteriaNode.RightChild))); }
private static void VisitExpression <T>(Expression expression, CriteriaNode criteriaNode) { if (expression is Expression <Func <T, bool> > ) { var temp = expression as Expression <Func <T, bool> >; VisitExpression <T>(temp.Body, criteriaNode); return; } if (expression is BinaryExpression) { var binaryExpresion = expression as BinaryExpression; if (binaryExpresion.NodeType == ExpressionType.AndAlso || binaryExpresion.NodeType == ExpressionType.OrElse) { criteriaNode.LeftExpression = binaryExpresion.Left; criteriaNode.RightExpression = binaryExpresion.Right; if (binaryExpresion.NodeType == ExpressionType.AndAlso) { criteriaNode.NodeType = CriteriaNodeType.AND; } else { criteriaNode.NodeType = CriteriaNodeType.OR; } criteriaNode.LeftChild = new CriteriaNode(criteriaNode); criteriaNode.RightChild = new CriteriaNode(criteriaNode); VisitExpression <T>(criteriaNode.LeftExpression, criteriaNode.LeftChild); VisitExpression <T>(criteriaNode.RightExpression, criteriaNode.RightChild); return; } } criteriaNode.Criteria = CreateCriteria <T>(expression); }
internal CriteriaNode(CriteriaNode parent) { Parent = parent; }
internal CriteriaNode(CriteriaNode parent) { Parent = parent; }