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OdbcConnectionHelper.cs
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OdbcConnectionHelper.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Data.Common;
using System.Data.ProviderBase;
using System.Diagnostics;
using System.Threading;
namespace System.Data.Odbc
{
public sealed partial class OdbcConnection : DbConnection
{
private static readonly DbConnectionFactory s_connectionFactory = OdbcConnectionFactory.SingletonInstance;
private DbConnectionOptions? _userConnectionOptions;
private DbConnectionPoolGroup? _poolGroup;
private DbConnectionInternal _innerConnection;
private int _closeCount;
public OdbcConnection() : base()
{
GC.SuppressFinalize(this);
_innerConnection = DbConnectionClosedNeverOpened.SingletonInstance;
}
// Copy Constructor
private void CopyFrom(OdbcConnection connection)
{ // V1.2.3300
ADP.CheckArgumentNull(connection, nameof(connection));
_userConnectionOptions = connection.UserConnectionOptions;
_poolGroup = connection.PoolGroup;
// SQLBU 432115
// Match the original connection's behavior for whether the connection was never opened,
// but ensure Clone is in the closed state.
if (DbConnectionClosedNeverOpened.SingletonInstance == connection._innerConnection)
{
_innerConnection = DbConnectionClosedNeverOpened.SingletonInstance;
}
else
{
_innerConnection = DbConnectionClosedPreviouslyOpened.SingletonInstance;
}
}
internal int CloseCount
{
get
{
return _closeCount;
}
}
internal static DbConnectionFactory ConnectionFactory
{
get
{
return s_connectionFactory;
}
}
internal DbConnectionOptions? ConnectionOptions
{
get
{
System.Data.ProviderBase.DbConnectionPoolGroup? poolGroup = PoolGroup;
return poolGroup?.ConnectionOptions;
}
}
private string ConnectionString_Get()
{
bool hidePassword = InnerConnection.ShouldHidePassword;
DbConnectionOptions? connectionOptions = UserConnectionOptions;
return ((null != connectionOptions) ? connectionOptions.UsersConnectionString(hidePassword) : "");
}
private void ConnectionString_Set(string? value)
{
DbConnectionPoolKey key = new DbConnectionPoolKey(value);
ConnectionString_Set(key);
}
private void ConnectionString_Set(DbConnectionPoolKey key)
{
DbConnectionOptions? connectionOptions = null;
System.Data.ProviderBase.DbConnectionPoolGroup? poolGroup = ConnectionFactory.GetConnectionPoolGroup(key, null, ref connectionOptions);
DbConnectionInternal connectionInternal = InnerConnection;
bool flag = connectionInternal.AllowSetConnectionString;
if (flag)
{
flag = SetInnerConnectionFrom(DbConnectionClosedBusy.SingletonInstance, connectionInternal);
if (flag)
{
_userConnectionOptions = connectionOptions;
_poolGroup = poolGroup;
_innerConnection = DbConnectionClosedNeverOpened.SingletonInstance;
}
}
if (!flag)
{
throw ADP.OpenConnectionPropertySet(nameof(ConnectionString), connectionInternal.State);
}
}
internal DbConnectionInternal InnerConnection
{
get
{
return _innerConnection;
}
}
internal System.Data.ProviderBase.DbConnectionPoolGroup? PoolGroup
{
get
{
return _poolGroup;
}
set
{
Debug.Assert(null != value, "null poolGroup");
_poolGroup = value;
}
}
internal DbConnectionOptions? UserConnectionOptions
{
get
{
return _userConnectionOptions;
}
}
internal void Abort(Exception e)
{
DbConnectionInternal innerConnection = _innerConnection;
if (ConnectionState.Open == innerConnection.State)
{
Interlocked.CompareExchange(ref _innerConnection, DbConnectionClosedPreviouslyOpened.SingletonInstance, innerConnection);
innerConnection.DoomThisConnection();
}
}
internal void AddWeakReference(object value, int tag)
{
InnerConnection.AddWeakReference(value, tag);
}
protected override DbCommand CreateDbCommand()
{
DbProviderFactory providerFactory = ConnectionFactory.ProviderFactory;
DbCommand command = providerFactory.CreateCommand()!;
command.Connection = this;
return command;
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
_userConnectionOptions = null;
_poolGroup = null;
Close();
}
base.Dispose(disposing);
}
partial void RepairInnerConnection();
public override DataTable GetSchema()
{
return this.GetSchema(DbMetaDataCollectionNames.MetaDataCollections, null);
}
public override DataTable GetSchema(string collectionName)
{
return this.GetSchema(collectionName, null);
}
public override DataTable GetSchema(string collectionName, string?[]? restrictionValues)
{
// NOTE: This is virtual because not all providers may choose to support
// returning schema data
return InnerConnection.GetSchema(ConnectionFactory, PoolGroup!, this, collectionName, restrictionValues);
}
internal void NotifyWeakReference(int message)
{
InnerConnection.NotifyWeakReference(message);
}
internal void PermissionDemand()
{
Debug.Assert(DbConnectionClosedConnecting.SingletonInstance == _innerConnection, "not connecting");
System.Data.ProviderBase.DbConnectionPoolGroup? poolGroup = PoolGroup;
DbConnectionOptions? connectionOptions = poolGroup?.ConnectionOptions;
if ((null == connectionOptions) || connectionOptions.IsEmpty)
{
throw ADP.NoConnectionString();
}
DbConnectionOptions? userConnectionOptions = UserConnectionOptions;
Debug.Assert(null != userConnectionOptions, "null UserConnectionOptions");
}
internal void RemoveWeakReference(object value)
{
InnerConnection.RemoveWeakReference(value);
}
internal void SetInnerConnectionEvent(DbConnectionInternal to)
{
Debug.Assert(null != _innerConnection, "null InnerConnection");
Debug.Assert(null != to, "to null InnerConnection");
ConnectionState originalState = _innerConnection.State & ConnectionState.Open;
ConnectionState currentState = to.State & ConnectionState.Open;
if ((originalState != currentState) && (ConnectionState.Closed == currentState))
{
unchecked { _closeCount++; }
}
_innerConnection = to;
if (ConnectionState.Closed == originalState && ConnectionState.Open == currentState)
{
OnStateChange(DbConnectionInternal.StateChangeOpen);
}
else if (ConnectionState.Open == originalState && ConnectionState.Closed == currentState)
{
OnStateChange(DbConnectionInternal.StateChangeClosed);
}
else
{
Debug.Fail("unexpected state switch");
if (originalState != currentState)
{
OnStateChange(new StateChangeEventArgs(originalState, currentState));
}
}
}
internal bool SetInnerConnectionFrom(DbConnectionInternal to, DbConnectionInternal from)
{
Debug.Assert(null != _innerConnection, "null InnerConnection");
Debug.Assert(null != from, "from null InnerConnection");
Debug.Assert(null != to, "to null InnerConnection");
bool result = (from == Interlocked.CompareExchange<DbConnectionInternal>(ref _innerConnection, to, from));
return result;
}
internal void SetInnerConnectionTo(DbConnectionInternal to)
{
Debug.Assert(null != _innerConnection, "null InnerConnection");
Debug.Assert(null != to, "to null InnerConnection");
_innerConnection = to;
}
}
}