mcs/class/System.Data.Linq/src/DbLinq.Firebird/FirebirdVendor.cs

   1 #region MIT license\r
   2 // \r
   3 // MIT license\r
   4 //\r
   5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne\r
   6 // \r
   7 // Permission is hereby granted, free of charge, to any person obtaining a copy\r
   8 // of this software and associated documentation files (the "Software"), to deal\r
   9 // in the Software without restriction, including without limitation the rights\r
  10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\r
  11 // copies of the Software, and to permit persons to whom the Software is\r
  12 // furnished to do so, subject to the following conditions:\r
  13 // \r
  14 // The above copyright notice and this permission notice shall be included in\r
  15 // all copies or substantial portions of the Software.\r
  16 // \r
  17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
  18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
  19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\r
  20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\r
  21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\r
  22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\r
  23 // THE SOFTWARE.\r
  24 // \r
  25 #endregion\r
  26 using System;\r
  27 using System.Data.Common;\r
  28 using System.Linq;\r
  29 using System.Collections.Generic;\r
  30 using System.Text;\r
  31 using System.Data.Linq.Mapping;\r
  32 using System.Reflection;\r
  33 using System.Data;\r
  34 \r
  35 #if MONO_STRICT\r
  36 using System.Data.Linq;\r
  37 #else\r
  38 using DbLinq.Data.Linq;\r
  39 #endif\r
  40 \r
  41 using DbLinq.Data.Linq.SqlClient;\r
  42 using DbLinq.Util;\r
  43 using DbLinq.Vendor;\r
  44 \r
  45 namespace DbLinq.Firebird\r
  46 {\r
  47     [Vendor(typeof(FirebirdProvider))]\r
  48 #if !MONO_STRICT\r
  49     public\r
  50 #endif\r
  51     class FirebirdVendor : Vendor.Implementation.Vendor\r
  52     {\r
  53         public override string VendorName { get { return "FirebirdSql"; } }\r
  54 \r
  55         protected readonly FirebirdSqlProvider sqlProvider = new FirebirdSqlProvider();\r
  56         public override ISqlProvider SqlProvider { get { return sqlProvider; } }\r
  57 \r
  58         /// <summary>\r
  59         /// call mysql stored proc or stored function, \r
  60         /// optionally return DataSet, and collect return params.\r
  61         /// </summary>\r
  62         public override System.Data.Linq.IExecuteResult ExecuteMethodCall(DataContext context, MethodInfo method\r
  63                                                                  , params object[] inputValues)\r
  64         {\r
  65             if (method == null)\r
  66                 throw new ArgumentNullException("L56 Null 'method' parameter");\r
  67 \r
  68             //check to make sure there is exactly one [FunctionEx]? that's below.\r
  69             //FunctionAttribute functionAttrib = GetFunctionAttribute(method);\r
  70             var functionAttrib = context.Mapping.GetFunction(method);\r
  71 \r
  72             ParameterInfo[] paramInfos = method.GetParameters();\r
  73             //int numRequiredParams = paramInfos.Count(p => p.IsIn || p.IsRetval);\r
  74             //if (numRequiredParams != inputValues.Length)\r
  75             //    throw new ArgumentException("L161 Argument count mismatch");\r
  76 \r
  77             string sp_name = functionAttrib.MappedName;\r
  78 \r
  79             // picrap: is there any way to abstract some part of this?\r
  80             using (IDbCommand command = context.Connection.CreateCommand())\r
  81             {\r
  82                 command.CommandText = sp_name;\r
  83                 //FbSqlCommand command = new FbSqlCommand("select * from hello0()");\r
  84                 int currInputIndex = 0;\r
  85 \r
  86                 List<string> paramNames = new List<string>();\r
  87                 for (int i = 0; i < paramInfos.Length; i++)\r
  88                 {\r
  89                     ParameterInfo paramInfo = paramInfos[i];\r
  90 \r
  91                     //TODO: check to make sure there is exactly one [Parameter]?\r
  92                     ParameterAttribute paramAttrib = paramInfo.GetCustomAttributes(false).OfType<ParameterAttribute>().Single();\r
  93 \r
  94                     string paramName = "@" + paramAttrib.Name; //eg. '@param1'\r
  95                     paramNames.Add(paramName);\r
  96 \r
  97                     System.Data.ParameterDirection direction = GetDirection(paramInfo, paramAttrib);\r
  98                     //FbDbType dbType = FbSqlTypeConversions.ParseType(paramAttrib.DbType);\r
  99                     IDbDataParameter cmdParam = command.CreateParameter();\r
 100                     cmdParam.ParameterName = paramName;\r
 101                     //cmdParam.Direction = System.Data.ParameterDirection.Input;\r
 102                     if (direction == System.Data.ParameterDirection.Input || direction == System.Data.ParameterDirection.InputOutput)\r
 103                     {\r
 104                         object inputValue = inputValues[currInputIndex++];\r
 105                         cmdParam.Value = inputValue;\r
 106                     }\r
 107                     else\r
 108                     {\r
 109                         cmdParam.Value = null;\r
 110                     }\r
 111                     cmdParam.Direction = direction;\r
 112                     command.Parameters.Add(cmdParam);\r
 113                 }\r
 114 \r
 115                 if (!functionAttrib.IsComposable) // IsCompsable is false when we have a procedure\r
 116                 {\r
 117                     //procedures: under the hood, this seems to prepend 'CALL '\r
 118                     command.CommandType = System.Data.CommandType.StoredProcedure;\r
 119                 }\r
 120                 else\r
 121                 {\r
 122                     //functions: 'SELECT * FROM myFunction()' or 'SELECT * FROM hello(?s)'\r
 123                     command.CommandText = "SELECT * FROM " + command.CommandText + "("\r
 124                         + string.Join(",", paramNames.ToArray()) + ")";\r
 125                 }\r
 126 \r
 127                 if (method.ReturnType == typeof(DataSet))\r
 128                 {\r
 129                     //unknown shape of resultset:\r
 130                     System.Data.DataSet dataSet = new DataSet();\r
 131                     //IDataAdapter adapter = new FbDataAdapter((FbCommand)command);\r
 132                     IDbDataAdapter adapter = CreateDataAdapter(context);\r
 133                     adapter.SelectCommand = command;\r
 134                     adapter.Fill(dataSet);\r
 135                     List<object> outParamValues = CopyOutParams(paramInfos, command.Parameters);\r
 136                     return new ProcedureResult(dataSet, outParamValues.ToArray());\r
 137                 }\r
 138                 else\r
 139                 {\r
 140                     object obj = command.ExecuteScalar();\r
 141                     List<object> outParamValues = CopyOutParams(paramInfos, command.Parameters);\r
 142                     return new ProcedureResult(obj, outParamValues.ToArray());\r
 143                 }\r
 144             }\r
 145         }\r
 146 \r
 147         static System.Data.ParameterDirection GetDirection(ParameterInfo paramInfo, ParameterAttribute paramAttrib)\r
 148         {\r
 149             //strange hack to determine what's a ref, out parameter:\r
 150             //http://lists.ximian.com/pipermain/mono-list/2003-March/012751.html\r
 151             bool hasAmpersand = paramInfo.ParameterType.FullName.Contains('&');\r
 152             if (paramInfo.IsOut)\r
 153                 return System.Data.ParameterDirection.Output;\r
 154             if (hasAmpersand)\r
 155                 return System.Data.ParameterDirection.InputOutput;\r
 156             return System.Data.ParameterDirection.Input;\r
 157         }\r
 158 \r
 159         /// <summary>\r
 160         /// Collect all Out or InOut param values, casting them to the correct .net type.\r
 161         /// </summary>\r
 162         private List<object> CopyOutParams(ParameterInfo[] paramInfos, IDataParameterCollection paramSet)\r
 163         {\r
 164             List<object> outParamValues = new List<object>();\r
 165             //Type type_t = typeof(T);\r
 166             int i = -1;\r
 167             foreach (IDbDataParameter param in paramSet)\r
 168             {\r
 169                 i++;\r
 170                 if (param.Direction == System.Data.ParameterDirection.Input)\r
 171                 {\r
 172                     outParamValues.Add("unused");\r
 173                     continue;\r
 174                 }\r
 175 \r
 176                 object val = param.Value;\r
 177                 Type desired_type = paramInfos[i].ParameterType;\r
 178 \r
 179                 if (desired_type.Name.EndsWith("&"))\r
 180                 {\r
 181                     //for ref and out parameters, we need to tweak ref types, e.g.\r
 182                     // "System.Int32&, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"\r
 183                     string fullName1 = desired_type.AssemblyQualifiedName;\r
 184                     string fullName2 = fullName1.Replace("&", "");\r
 185                     desired_type = Type.GetType(fullName2);\r
 186                 }\r
 187                 try\r
 188                 {\r
 189                     //fi.SetValue(t, val); //fails with 'System.Decimal cannot be converted to Int32'\r
 190                     //DbLinq.util.FieldUtils.SetObjectIdField(t, fi, val);\r
 191                     //object val2 = FieldUtils.CastValue(val, desired_type);\r
 192                     object val2 = TypeConvert.To(val, desired_type);\r
 193                     outParamValues.Add(val2);\r
 194                 }\r
 195                 catch (Exception)\r
 196                 {\r
 197                     //fails with 'System.Decimal cannot be converted to Int32'\r
 198                     //Logger.Write(Level.Error, "CopyOutParams ERROR L245: failed on CastValue(): " + ex.Message);\r
 199                 }\r
 200             }\r
 201             return outParamValues;\r
 202         }\r
 203     }\r
 204 }\r