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NpgsqlConnectionStringBuilder.cs
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1199 lines (1080 loc) · 43.6 KB
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// created on 29/11/2007
// Npgsql.NpgsqlConnectionStringBuilder.cs
//
// Author:
// Glen Parker (glenebob@gmail.com)
// Ben Sagal (bensagal@gmail.com)
// Tao Wang (dancefire@gmail.com)
//
// Copyright (C) 2007 The Npgsql Development Team
// npgsql-general@gborg.postgresql.org
// http://gborg.postgresql.org/project/npgsql/projdisplay.php
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Diagnostics;
using System.DirectoryServices;
using System.Reflection;
using System.Resources;
using System.Runtime.Versioning;
using System.Security.Principal;
using System.Text;
// Keep the xml comment warning quiet for this file.
#pragma warning disable 1591
namespace Npgsql
{
public sealed class NpgsqlConnectionStringBuilder : DbConnectionStringBuilder
{
private delegate string ValueNativeToString(object value);
private class ValueDescription
{
internal readonly IComparable ImplicitDefault;
internal readonly IComparable ExplicitDefault;
internal readonly bool DefaultsDiffer;
internal readonly bool StoreInBase;
private readonly ValueNativeToString NativeToString;
/// <summary>
/// Set both ImplicitDefault and ExplicitDefault to the <paramref name="t"/>'s default value.
/// </summary>
/// <param name="t"></param>
/// <param name="storeInBase"></param>
/// <param name="nativeToString"></param>
internal ValueDescription(Type t, bool storeInBase = true, ValueNativeToString nativeToString = null)
{
ImplicitDefault = GetImplicitDefault(t);
ExplicitDefault = ImplicitDefault;
DefaultsDiffer = false;
StoreInBase = storeInBase;
NativeToString = nativeToString;
}
/// <summary>
/// Set ImplicitDefault to the default value of <paramref name="explicitDefault"/>'s type,
/// and ExplicitDefault to <paramref name="explicitDefault"/>.
/// </summary>
/// <param name="explicitDefault"></param>
/// <param name="storeInBase"></param>
/// <param name="nativeToString"></param>
internal ValueDescription(IComparable explicitDefault, bool storeInBase = true, ValueNativeToString nativeToString = null)
{
ImplicitDefault = GetImplicitDefault(explicitDefault.GetType());
ExplicitDefault = explicitDefault;
DefaultsDiffer = (ImplicitDefault.CompareTo(ExplicitDefault) != 0);
StoreInBase = storeInBase;
NativeToString = nativeToString;
}
private static IComparable GetImplicitDefault(Type t)
{
if (t == typeof(string))
{
return string.Empty;
}
else
{
return (IComparable)Activator.CreateInstance(t);
}
}
internal string ConvertNativeToString(object value)
{
string asString = value as string;
if (asString != null)
{
return asString.Trim();
}
else if (NativeToString != null)
{
return NativeToString(value);
}
else
{
return value.ToString();
}
}
}
private static readonly ResourceManager resman = new ResourceManager(MethodBase.GetCurrentMethod().DeclaringType);
private static readonly Dictionary<Keywords, ValueDescription> valueDescriptions = new Dictionary<Keywords, ValueDescription>();
private string originalConnectionString;
private const int POOL_SIZE_LIMIT = 1024;
private const int TIMEOUT_LIMIT = 1024;
#region Constructors
static NpgsqlConnectionStringBuilder()
{
// Set up value descriptions.
// All connection string values have an implicit default (its type's default value),
// and an explicit default which can be different from its
// implicit default.
valueDescriptions.Add(Keywords.Host, new ValueDescription(typeof(string)));
valueDescriptions.Add(Keywords.Port, new ValueDescription((Int32)5432));
#pragma warning disable 618
valueDescriptions.Add(Keywords.Protocol, new ValueDescription(ProtocolVersion.Version3, false));
#pragma warning restore 618
valueDescriptions.Add(Keywords.Database, new ValueDescription(typeof(string)));
valueDescriptions.Add(Keywords.UserName, new ValueDescription(typeof(string)));
valueDescriptions.Add(Keywords.Password, new ValueDescription(typeof(string)));
valueDescriptions.Add(Keywords.SSL, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.SslMode, new ValueDescription(typeof(SslMode)));
#pragma warning disable 618
valueDescriptions.Add(Keywords.Encoding, new ValueDescription("UTF8", false));
#pragma warning restore 618
valueDescriptions.Add(Keywords.Timeout, new ValueDescription((Int32)15));
valueDescriptions.Add(Keywords.SearchPath, new ValueDescription(typeof(string)));
valueDescriptions.Add(Keywords.Pooling, new ValueDescription(true));
valueDescriptions.Add(Keywords.ConnectionLifeTime, new ValueDescription(typeof(Int32)));
valueDescriptions.Add(Keywords.MinPoolSize, new ValueDescription((Int32)1));
valueDescriptions.Add(Keywords.MaxPoolSize, new ValueDescription((Int32)20));
valueDescriptions.Add(Keywords.SyncNotification, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.CommandTimeout, new ValueDescription((Int32)20));
valueDescriptions.Add(Keywords.Enlist, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.PreloadReader, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.UseExtendedTypes, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.IntegratedSecurity, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.IncludeRealm, new ValueDescription(typeof(bool)));
valueDescriptions.Add(Keywords.Compatible, new ValueDescription(THIS_VERSION));
valueDescriptions.Add(Keywords.ApplicationName, new ValueDescription(typeof(string)));
valueDescriptions.Add(Keywords.AlwaysPrepare, new ValueDescription(typeof(bool)));
}
public NpgsqlConnectionStringBuilder()
{
_password = new PasswordBytes();
this.Clear();
}
public NpgsqlConnectionStringBuilder(string connectionString)
{
_password = new PasswordBytes();
this.originalConnectionString = connectionString;
base.ConnectionString = connectionString;
CheckValues();
}
#endregion
/// <summary>
/// Return an exact copy of this NpgsqlConnectionString.
/// </summary>
public NpgsqlConnectionStringBuilder Clone()
{
NpgsqlConnectionStringBuilder builder = new NpgsqlConnectionStringBuilder();
foreach (string key in this.Keys)
{
builder[key] = this[key];
}
return builder;
}
private void CheckValues()
{
if ((MaxPoolSize > 0) && (MinPoolSize > MaxPoolSize))
{
string key = GetKeyName(Keywords.MinPoolSize);
throw new ArgumentOutOfRangeException(
key, String.Format(resman.GetString("Exception_IntegerKeyValMax"), key, MaxPoolSize));
}
}
#region Parsing Functions
private static SslMode ToSslMode(object value)
{
if (value is SslMode)
{
return (SslMode) value;
}
else
{
return (SslMode) Enum.Parse(typeof (SslMode), value.ToString(), true);
}
}
private static int ToInt32(object value, int min, int max, Keywords keyword)
{
int v = Convert.ToInt32(value);
if (v < min)
{
string key = GetKeyName(keyword);
throw new ArgumentOutOfRangeException(
key, String.Format(resman.GetString("Exception_IntegerKeyValMin"), key, min));
}
else if (v > max)
{
string key = GetKeyName(keyword);
throw new ArgumentOutOfRangeException(
key, String.Format(resman.GetString("Exception_IntegerKeyValMax"), key, max));
}
return v;
}
private static Boolean ToBoolean(object value)
{
string text = value as string;
if (text != null)
{
switch (text.ToLowerInvariant())
{
case "t":
case "true":
case "y":
case "yes":
return true;
case "f":
case "false":
case "n":
case "no":
return false;
default:
throw new InvalidCastException(value.ToString());
}
}
else
{
return Convert.ToBoolean(value);
}
}
private Boolean ToIntegratedSecurity(object value)
{
string text = value as string;
if (text != null)
{
switch (text.ToLowerInvariant())
{
case "t":
case "true":
case "y":
case "yes":
case "sspi":
return true;
case "f":
case "false":
case "n":
case "no":
return false;
default:
throw new InvalidCastException(value.ToString());
}
}
else
{
return Convert.ToBoolean(value);
}
}
#endregion
#region Properties
private string _host;
/// <summary>
/// Gets or sets the backend server host name.
/// </summary>
public string Host
{
get { return _host; }
set { SetValue(GetKeyName(Keywords.Host), Keywords.Host, value); }
}
private int _port;
/// <summary>
/// Gets or sets the backend server port.
/// </summary>
public int Port
{
get { return _port; }
set { SetValue(GetKeyName(Keywords.Port), Keywords.Port, value); }
}
private string _database;
///<summary>
/// Gets or sets the name of the database to be used after a connection is opened.
/// </summary>
/// <value>The name of the database to be
/// used after a connection is opened.</value>
public string Database
{
get { return _database; }
set { SetValue(GetKeyName(Keywords.Database), Keywords.Database, value); }
}
#region Integrated security
class CachedUpn {
public string Upn;
public DateTime ExpiryTimeUtc;
}
static Dictionary<SecurityIdentifier, CachedUpn> cachedUpns = new Dictionary<SecurityIdentifier,CachedUpn>();
private string GetIntegratedUserName()
{
// Side note: This maintains the hack fix mentioned before for https://github.com/npgsql/Npgsql/issues/133.
// In a nutshell, starting with .NET 4.5 WindowsIdentity inherits from ClaimsIdentity
// which doesn't exist in mono, and calling a WindowsIdentity method bombs.
// The workaround is that this function that actually deals with WindowsIdentity never
// gets called on mono, so never gets JITted and the problem goes away.
// Gets the current user's username for integrated security purposes
WindowsIdentity identity = WindowsIdentity.GetCurrent();
CachedUpn cachedUpn = null;
string upn = null;
// Check to see if we already have this UPN cached
lock (cachedUpns)
{
if (cachedUpns.TryGetValue(identity.User, out cachedUpn))
{
if (cachedUpn.ExpiryTimeUtc > DateTime.UtcNow)
upn = cachedUpn.Upn;
else
cachedUpns.Remove(identity.User);
}
}
try
{
if (upn == null) {
// Try to get the user's UPN in its correct case; this is what the
// server will need to verify against a Kerberos/SSPI ticket
// First, find a domain server we can talk to
string domainHostName;
using (DirectoryEntry rootDse = new DirectoryEntry("LDAP://rootDSE") { AuthenticationType = AuthenticationTypes.Secure })
{
domainHostName = (string) rootDse.Properties["dnsHostName"].Value;
}
// Query the domain server by the current user's SID
using (DirectoryEntry entry = new DirectoryEntry("LDAP://" + domainHostName) { AuthenticationType = AuthenticationTypes.Secure })
{
DirectorySearcher search = new DirectorySearcher(entry,
"(objectSid=" + identity.User.Value + ")", new string[] { "userPrincipalName" });
SearchResult result = search.FindOne();
upn = (string) result.Properties["userPrincipalName"][0];
}
}
if (cachedUpn == null)
{
// Save this value
cachedUpn = new CachedUpn() { Upn = upn, ExpiryTimeUtc = DateTime.UtcNow.AddHours( 3.0 ) };
lock (cachedUpns)
{
cachedUpns[identity.User] = cachedUpn;
}
}
string[] upnParts = upn.Split('@');
if(_includeRealm)
{
// Make it Kerberos-y by uppercasing the realm part
return upnParts[0] + "@" + upnParts[1].ToUpperInvariant();
}
else
{
return upnParts[0];
}
}
catch
{
// Querying the directory failed, so return the SAM name
// (which probably won't work, but it's better than nothing)
return identity.Name.Split('\\')[1];
}
}
#endregion
private string _username;
/// <summary>
/// Gets or sets the login user name.
/// </summary>
public string UserName
{
get
{
if ((_integrated_security) && (String.IsNullOrEmpty(_username)))
{
_username = GetIntegratedUserName();
}
return _username;
}
set { SetValue(GetKeyName(Keywords.UserName), Keywords.UserName, value); }
}
private PasswordBytes _password;
/// <summary>
/// Gets or sets the login password as a UTF8 encoded byte array.
/// </summary>
public byte[] PasswordAsByteArray
{
get { return _password.PasswordAsByteArray; }
set
{
if (value == null)
{
throw new ArgumentNullException("PasswordAsByteArray");
}
_password.PasswordAsByteArray = value;
}
}
/// <summary>
/// Sets the login password as a string.
/// </summary>
public string Password
{
set { SetValue(GetKeyName(Keywords.Password), Keywords.Password, value); }
}
private bool _ssl;
/// <summary>
/// Gets or sets a value indicating whether to attempt to use SSL.
/// </summary>
public bool SSL
{
get { return _ssl; }
set { SetValue(GetKeyName(Keywords.SSL), Keywords.SSL, value); }
}
private SslMode _sslmode;
/// <summary>
/// Gets or sets a value indicating whether to attempt to use SSL.
/// </summary>
public SslMode SslMode
{
get { return _sslmode; }
set { SetValue(GetKeyName(Keywords.SslMode), Keywords.SslMode, value); }
}
private int _timeout;
/// <summary>
/// Gets or sets the time to wait while trying to establish a connection
/// before terminating the attempt and generating an error.
/// </summary>
/// <value>The time (in seconds) to wait for a connection to open. The default value is 15 seconds.</value>
public int Timeout
{
get { return _timeout; }
set { SetValue(GetKeyName(Keywords.Timeout), Keywords.Timeout, value); }
}
private string _searchpath;
/// <summary>
/// Gets or sets the schema search path.
/// </summary>
public string SearchPath
{
get { return _searchpath; }
set { SetValue(GetKeyName(Keywords.SearchPath), Keywords.SearchPath, value); }
}
private bool _pooling;
/// <summary>
/// Gets or sets a value indicating whether connection pooling should be used.
/// </summary>
public bool Pooling
{
get { return _pooling; }
set { SetValue(GetKeyName(Keywords.Pooling), Keywords.Pooling, value); }
}
private int _connection_life_time;
/// <summary>
/// Gets or sets the time to wait before closing unused connections in the pool if the count
/// of all connections exeeds MinPoolSize.
/// </summary>
/// <remarks>
/// If connection pool contains unused connections for ConnectionLifeTime seconds,
/// the half of them will be closed. If there will be unused connections in a second
/// later then again the half of them will be closed and so on.
/// This strategy provide smooth change of connection count in the pool.
/// </remarks>
/// <value>The time (in seconds) to wait. The default value is 15 seconds.</value>
public int ConnectionLifeTime
{
get { return _connection_life_time; }
set { SetValue(GetKeyName(Keywords.ConnectionLifeTime), Keywords.ConnectionLifeTime, value); }
}
private int _min_pool_size;
/// <summary>
/// Gets or sets the minimum connection pool size.
/// </summary>
public int MinPoolSize
{
get { return _min_pool_size; }
set { SetValue(GetKeyName(Keywords.MinPoolSize), Keywords.MinPoolSize, value); }
}
private int _max_pool_size;
/// <summary>
/// Gets or sets the maximum connection pool size.
/// </summary>
public int MaxPoolSize
{
get { return _max_pool_size; }
set { SetValue(GetKeyName(Keywords.MaxPoolSize), Keywords.MaxPoolSize, value); }
}
private bool _sync_notification;
/// <summary>
/// Gets or sets a value indicating whether to listen for notifications and report them between command activity.
/// </summary>
public bool SyncNotification
{
get { return _sync_notification; }
set { SetValue(GetKeyName(Keywords.SyncNotification), Keywords.SyncNotification, value); }
}
private int _command_timeout;
/// <summary>
/// Gets the time to wait while trying to execute a command
/// before terminating the attempt and generating an error.
/// </summary>
/// <value>The time (in seconds) to wait for a command to complete. The default value is 20 seconds.</value>
public int CommandTimeout
{
get { return _command_timeout; }
set { SetValue(GetKeyName(Keywords.CommandTimeout), Keywords.CommandTimeout, value); }
}
private bool _enlist;
public bool Enlist
{
get { return _enlist; }
set { SetValue(GetKeyName(Keywords.Enlist), Keywords.Enlist, value); }
}
private bool _preloadReader;
/// <summary>
/// Gets or sets a value indicating whether datareaders are loaded in their entirety (for compatibility with earlier code).
/// </summary>
public bool PreloadReader
{
get { return _preloadReader; }
set { SetValue(GetKeyName(Keywords.PreloadReader), Keywords.PreloadReader, value); }
}
private bool _useExtendedTypes;
public bool UseExtendedTypes
{
get { return _useExtendedTypes; }
set { SetValue(GetKeyName(Keywords.UseExtendedTypes), Keywords.UseExtendedTypes, value); }
}
private bool _integrated_security;
public bool IntegratedSecurity
{
get { return _integrated_security; }
set
{
if (value == true)
CheckIntegratedSecuritySupport();
SetValue(GetKeyName(Keywords.IntegratedSecurity), Keywords.IntegratedSecurity, value);
}
}
/// <summary>
/// No integrated security if we're on mono and .NET 4.5 because of ClaimsIdentity,
/// see https://github.com/npgsql/Npgsql/issues/133
/// </summary>
[Conditional("NET45")]
private static void CheckIntegratedSecuritySupport()
{
if (Type.GetType("Mono.Runtime") != null)
throw new NotSupportedException("IntegratedSecurity is currently unsupported on mono and .NET 4.5 (see https://github.com/npgsql/Npgsql/issues/133)");
}
private bool _includeRealm;
public bool IncludeRealm
{
get { return _includeRealm; }
set { SetValue(GetKeyName(Keywords.IncludeRealm), Keywords.IncludeRealm, value); }
}
private Version _compatible;
private static readonly Version THIS_VERSION =
MethodBase.GetCurrentMethod().DeclaringType.Assembly.GetName().Version;
/// <summary>
/// Compatibilty version. When possible, behaviour caused by breaking changes will be preserved
/// if this version is less than that where the breaking change was introduced.
/// </summary>
public Version Compatible
{
get { return _compatible; }
set { SetValue(GetKeyName(Keywords.Compatible), Keywords.Compatible, value); }
}
private string _application_name;
/// <summary>
/// Gets or sets the ootional application name parameter to be sent to the backend during connection initiation.
/// </summary>
public string ApplicationName
{
get { return _application_name; }
set { SetValue(GetKeyName(Keywords.ApplicationName), Keywords.ApplicationName, value); }
}
private bool _always_prepare;
/// <summary>
/// Gets or sets a value indicating whether to silently Prepare() all commands before execution.
/// </summary>
public bool AlwaysPrepare
{
get { return _always_prepare; }
set { SetValue(GetKeyName(Keywords.AlwaysPrepare), Keywords.AlwaysPrepare, value); }
}
#endregion
#region DeprecatedProperties
/// <summary>
/// Gets or sets the specified backend communication protocol version.
/// </summary>
[Obsolete("Protocol versio 3 is always used regardless of this setting.")]
public ProtocolVersion Protocol
{
#pragma warning disable 618
get { return (ProtocolVersion)valueDescriptions[Keywords.Protocol].ExplicitDefault; }
#pragma warning restore 618
}
/// <summary>
/// Gets the backend encoding. Always returns "UTF8".
/// </summary>
[Obsolete("UTF8 is always used regardless of this setting.")]
public string Encoding
{
#pragma warning disable 618
get { return (string)valueDescriptions[Keywords.Encoding].ExplicitDefault; }
#pragma warning restore 618
}
#endregion
private static Keywords GetKey(string key)
{
switch (key.ToUpperInvariant())
{
case "HOST":
case "SERVER":
return Keywords.Host;
case "PORT":
return Keywords.Port;
case "PROTOCOL":
#pragma warning disable 618
return Keywords.Protocol;
#pragma warning restore 618
case "DATABASE":
case "DB":
return Keywords.Database;
case "USERNAME":
case "USER NAME":
case "USER":
case "USERID":
case "USER ID":
case "UID":
return Keywords.UserName;
case "PASSWORD":
case "PSW":
case "PWD":
return Keywords.Password;
case "SSL":
return Keywords.SSL;
case "SSLMODE":
return Keywords.SslMode;
case "ENCODING":
#pragma warning disable 618
return Keywords.Encoding;
#pragma warning restore 618
case "TIMEOUT":
return Keywords.Timeout;
case "SEARCHPATH":
return Keywords.SearchPath;
case "POOLING":
return Keywords.Pooling;
case "CONNECTIONLIFETIME":
return Keywords.ConnectionLifeTime;
case "MINPOOLSIZE":
return Keywords.MinPoolSize;
case "MAXPOOLSIZE":
return Keywords.MaxPoolSize;
case "SYNCNOTIFICATION":
return Keywords.SyncNotification;
case "COMMANDTIMEOUT":
return Keywords.CommandTimeout;
case "ENLIST":
return Keywords.Enlist;
case "PRELOADREADER":
case "PRELOAD READER":
return Keywords.PreloadReader;
case "USEEXTENDEDTYPES":
case "USE EXTENDED TYPES":
return Keywords.UseExtendedTypes;
case "INTEGRATED SECURITY":
return Keywords.IntegratedSecurity;
case "INCLUDEREALM":
return Keywords.IncludeRealm;
case "COMPATIBLE":
return Keywords.Compatible;
case "APPLICATIONNAME":
return Keywords.ApplicationName;
case "ALWAYSPREPARE":
return Keywords.AlwaysPrepare;
default:
throw new ArgumentException(resman.GetString("Exception_WrongKeyVal"), key);
}
}
internal static string GetKeyName(Keywords keyword)
{
switch (keyword)
{
case Keywords.Host:
return "HOST";
case Keywords.Port:
return "PORT";
#pragma warning disable 618
case Keywords.Protocol:
#pragma warning restore 618
return "PROTOCOL";
case Keywords.Database:
return "DATABASE";
case Keywords.UserName:
return "USER ID";
case Keywords.Password:
return "PASSWORD";
case Keywords.SSL:
return "SSL";
case Keywords.SslMode:
return "SSLMODE";
#pragma warning disable 618
case Keywords.Encoding:
#pragma warning restore 618
return "ENCODING";
case Keywords.Timeout:
return "TIMEOUT";
case Keywords.SearchPath:
return "SEARCHPATH";
case Keywords.Pooling:
return "POOLING";
case Keywords.ConnectionLifeTime:
return "CONNECTIONLIFETIME";
case Keywords.MinPoolSize:
return "MINPOOLSIZE";
case Keywords.MaxPoolSize:
return "MAXPOOLSIZE";
case Keywords.SyncNotification:
return "SYNCNOTIFICATION";
case Keywords.CommandTimeout:
return "COMMANDTIMEOUT";
case Keywords.Enlist:
return "ENLIST";
case Keywords.PreloadReader:
return "PRELOADREADER";
case Keywords.UseExtendedTypes:
return "USEEXTENDEDTYPES";
case Keywords.IntegratedSecurity:
return "INTEGRATED SECURITY";
case Keywords.IncludeRealm:
return "INCLUDEREALM";
case Keywords.Compatible:
return "COMPATIBLE";
case Keywords.ApplicationName:
return "APPLICATIONNAME";
case Keywords.AlwaysPrepare:
return "ALWAYSPREPARE";
default:
return keyword.ToString().ToUpperInvariant();
}
}
internal static object GetDefaultValue(Keywords keyword)
{
return valueDescriptions[keyword].ExplicitDefault;
}
/// <summary>
/// Case insensative accessor for indivual connection string values.
/// </summary>
public override object this[string keyword]
{
get { return GetValue(GetKey(keyword)); }
set { this[GetKey(keyword)] = value; }
}
public object this[Keywords keyword]
{
get { return GetValue(keyword); }
set { SetValue(GetKeyName(keyword), keyword, value); }
}
public override bool Remove(string keyword)
{
Keywords key = GetKey(keyword);
SetValue(key, GetDefaultValue(key));
return base.Remove(keyword);
}
public bool ContainsKey(Keywords keyword)
{
return base.ContainsKey(GetKeyName(keyword));
}
/// <summary>
/// This function will set value for known key, both private member and base[key].
/// </summary>
/// <param name="keyword"></param>
/// <param name="key"></param>
/// <param name="value"></param>
/// <returns>value, coerced as needed to the stored type.</returns>
private object SetValue(string keyword, Keywords key, object value)
{
ValueDescription description;
description = valueDescriptions[key];
if (! description.StoreInBase)
{
return value;
}
if (value == null)
{
Remove(keyword);
return value;
}
value = SetValue(key, value);
// If the value matches both the parameter's default and the type's default, remove it from base,
// otherwise convert to string and set the base value.
if (
description.DefaultsDiffer ||
(description.ExplicitDefault.CompareTo((IComparable)value) != 0)
)
{
base[keyword] = description.ConvertNativeToString(value);
}
else
{
base.Remove(keyword);
}
return value;
}
/// <summary>
/// The function will modify private member only, not base[key].
/// </summary>
/// <param name="keyword"></param>
/// <param name="value"></param>
/// <returns>value, coerced as needed to the stored type.</returns>
private object SetValue(Keywords keyword, object value)
{
try
{
switch (keyword)
{
case Keywords.Host:
return this._host = Convert.ToString(value);
case Keywords.Port:
return this._port = Convert.ToInt32(value);
#pragma warning disable 618
case Keywords.Protocol:
return Protocol;
#pragma warning restore 618
case Keywords.Database:
return this._database = Convert.ToString(value);
case Keywords.UserName:
return this._username = Convert.ToString(value);
case Keywords.Password:
this._password.Password = value as string;
return value as string;
case Keywords.SSL:
return this._ssl = ToBoolean(value);
case Keywords.SslMode:
return this._sslmode = ToSslMode(value);
#pragma warning disable 618
case Keywords.Encoding:
return Encoding;
#pragma warning restore 618
case Keywords.Timeout:
return this._timeout = ToInt32(value, 0, TIMEOUT_LIMIT, keyword);
case Keywords.SearchPath:
return this._searchpath = Convert.ToString(value);
case Keywords.Pooling:
return this._pooling = ToBoolean(value);
case Keywords.ConnectionLifeTime:
return this._connection_life_time = Convert.ToInt32(value);
case Keywords.MinPoolSize:
return this._min_pool_size = ToInt32(value, 0, POOL_SIZE_LIMIT, keyword);
case Keywords.MaxPoolSize:
return this._max_pool_size = ToInt32(value, 0, POOL_SIZE_LIMIT, keyword);
case Keywords.SyncNotification:
return this._sync_notification = ToBoolean(value);
case Keywords.CommandTimeout:
return this._command_timeout = Convert.ToInt32(value);
case Keywords.Enlist:
return this._enlist = ToBoolean(value);
case Keywords.PreloadReader:
return this._preloadReader = ToBoolean(value);
case Keywords.UseExtendedTypes:
return this._useExtendedTypes = ToBoolean(value);
case Keywords.IntegratedSecurity:
bool iS = ToIntegratedSecurity(value);
if (iS == true)
{
CheckIntegratedSecuritySupport();
}
return this._integrated_security = ToIntegratedSecurity(iS);
case Keywords.IncludeRealm:
return this._includeRealm = ToBoolean(value);
case Keywords.Compatible:
Version ver = new Version(value.ToString());
if (ver > THIS_VERSION)
throw new ArgumentException("Attempt to set compatibility with version " + value +
" when using version " + THIS_VERSION);
return _compatible = ver;
case Keywords.ApplicationName:
return this._application_name = Convert.ToString(value);
case Keywords.AlwaysPrepare:
return this._always_prepare = Convert.ToBoolean(value);
}
}
catch (InvalidCastException exception)
{
string exception_template = string.Empty;
switch (keyword)
{
case Keywords.Port:
case Keywords.Timeout: