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54 lines
2.1 KiB
54 lines
2.1 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace FLocal.Core.DB {
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public interface IDBConnection : IDisposable {
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List<Dictionary<string, string>> LoadByIds(ITableSpec table, List<string> ids);
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List<string> LoadIdsByConditions(ITableSpec table, conditions.AbstractCondition conditions, Diapasone diapasone, JoinSpec[] joins, SortSpec[] sorts);
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long GetCountByConditions(ITableSpec table, conditions.AbstractCondition conditions, JoinSpec[] joins);
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Transaction beginTransaction(System.Data.IsolationLevel iso);
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void lockTable(Transaction transaction, ITableSpec table);
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void lockRow(Transaction transaction, ITableSpec table, string id);
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List<Dictionary<string, string>> LoadByIds(Transaction transaction, ITableSpec table, List<string> ids);
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void update(Transaction transaction, ITableSpec table, string id, Dictionary<string, string> data);
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string insert(Transaction transaction, ITableSpec table, Dictionary<string, string> data);
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void delete(Transaction transaction, ITableSpec table, string id); //do we really need this?
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}
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public static class IDBConnectionExtensions {
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public static List<string> LoadIdsByConditions(this IDBConnection connection, ITableSpec table, conditions.AbstractCondition conditions, Diapasone diapasone, params JoinSpec[] joins) {
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return connection.LoadIdsByConditions(table, conditions, diapasone, joins, new SortSpec[] { new SortSpec(table.getIdSpec(), true) });
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}
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public static Transaction beginTransaction(this IDBConnection connection) {
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return connection.beginTransaction(System.Data.IsolationLevel.Snapshot);
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}
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public static Dictionary<string, string> LoadById(this IDBConnection connection, ITableSpec table, string id) {
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List<Dictionary<string, string>> rows = connection.LoadByIds(table, new List<string> { id });
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if(rows.Count < 1) {
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throw new NotFoundInDBException();
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}
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if(rows.Count > 1) {
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throw new CriticalException(rows.Count + " objects with specified id");
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}
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return rows[0];
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}
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}
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}
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