mcs/class/referencesource/System.Data/System/Data/Odbc/OdbcConnectionOpen.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="OdbcConnectionOpen.cs" company="Microsoft">
   3 //      Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">[....]</owner>
   6 // <owner current="true" primary="false">[....]</owner>
   7 //------------------------------------------------------------------------------
   8
   9 using System;
  10 using System.Data;
  11 using System.Data.Common;
  12 using System.Data.ProviderBase;
  13 using System.Threading;
  14 using SysTx = System.Transactions;
  15
  16 namespace System.Data.Odbc {
  17     sealed internal class OdbcConnectionOpen : DbConnectionInternal {
  18
  19         // Construct from a compiled connection string
  20         internal OdbcConnectionOpen(OdbcConnection outerConnection, OdbcConnectionString connectionOptions) {
  21 #if DEBUG
  22             try { // use this to help validate this object is only created after the following permission has been previously demanded in the current codepath
  23                 if (null != outerConnection) {
  24                     outerConnection.UserConnectionOptions.DemandPermission();
  25                 }
  26                 else {
  27                     connectionOptions.DemandPermission();
  28                 }
  29             }
  30             catch(System.Security.SecurityException) {
  31                 System.Diagnostics.Debug.Assert(false, "unexpected SecurityException for current codepath");
  32                 throw;
  33             }
  34 #endif
  35             OdbcEnvironmentHandle environmentHandle = OdbcEnvironment.GetGlobalEnvironmentHandle();
  36             outerConnection.ConnectionHandle = new OdbcConnectionHandle(outerConnection, connectionOptions, environmentHandle);
  37         }
  38
  39         internal OdbcConnection OuterConnection {
  40             get {
  41                 OdbcConnection outerConnection = (OdbcConnection)Owner;
  42
  43                 if (null == outerConnection)
  44                     throw ODBC.OpenConnectionNoOwner();
  45
  46                 return outerConnection;
  47             }
  48         }
  49
  50         override public string ServerVersion {
  51             get {
  52                 return OuterConnection.Open_GetServerVersion();
  53             }
  54         }
  55
  56         override protected void Activate(SysTx.Transaction transaction) {
  57             OdbcConnection.ExecutePermission.Demand();
  58         }
  59
  60         override public DbTransaction BeginTransaction(IsolationLevel isolevel) {
  61             return BeginOdbcTransaction(isolevel);
  62         }
  63
  64         internal OdbcTransaction BeginOdbcTransaction(IsolationLevel isolevel) {
  65             return OuterConnection.Open_BeginTransaction(isolevel);
  66         }
  67
  68         override public void ChangeDatabase(string value) {
  69             OuterConnection.Open_ChangeDatabase(value);
  70         }
  71
  72         override protected DbReferenceCollection CreateReferenceCollection() {
  73             return new OdbcReferenceCollection();
  74         }
  75
  76         override protected void Deactivate() {
  77             NotifyWeakReference(OdbcReferenceCollection.Closing);
  78         }
  79
  80         override public void EnlistTransaction(SysTx.Transaction transaction) {
  81             OuterConnection.Open_EnlistTransaction(transaction);
  82         }
  83     }
  84 }