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"Use_SQLiteConvert_DefaultTypeName", null);
if (value == null)
return FallbackDefaultTypeName;
return value;
}
#if !NET_COMPACT_20 && TRACE_WARNING
/// <summary>
/// If applicable, issues a trace log message warning about falling back to
/// the default database type name.
/// </summary>
/// <param name="dbType">
/// Determines the type name for the given database value type.
/// The database value type.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
/// <param name="typeName">
/// The textual name of the database type.
/// </param>
private static void DefaultTypeNameWarning(
DbType dbType,
SQLiteConnectionFlags flags,
string typeName
)
{
if ((flags & SQLiteConnectionFlags.TraceWarning) == SQLiteConnectionFlags.TraceWarning)
{
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"WARNING: Type mapping failed, returning default name \"{0}\" for type {1}.",
typeName, dbType));
}
}
/// <summary>
/// If applicable, issues a trace log message warning about falling back to
/// the default database value type.
/// </summary>
/// <param name="typeName">
/// The textual name of the database type.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
/// <param name="dbType">
/// The database value type.
/// </param>
private static void DefaultDbTypeWarning(
string typeName,
SQLiteConnectionFlags flags,
DbType? dbType
)
{
if (!String.IsNullOrEmpty(typeName) &&
((flags & SQLiteConnectionFlags.TraceWarning) == SQLiteConnectionFlags.TraceWarning))
{
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"WARNING: Type mapping failed, returning default type {0} for name \"{1}\".",
dbType, typeName));
}
}
#endif
/// <summary>
/// For a given database value type, return the "closest-match" textual database type name.
/// </summary>
/// <param name="connection">The connection context for custom type mappings, if any.</param>
/// <param name="dbType">The database value type.</param>
/// <param name="flags">The flags associated with the parent connection object.</param>
/// <returns>The type name or an empty string if it cannot be determined.</returns>
internal static string DbTypeToTypeName(
SQLiteConnection connection,
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//
// NOTE: Use the default database type name for the connection.
//
defaultTypeName = connection.DefaultTypeName;
}
if ((flags & SQLiteConnectionFlags.NoGlobalTypes) == SQLiteConnectionFlags.NoGlobalTypes)
{
return (defaultTypeName != null) ? defaultTypeName : GetDefaultTypeName();
if (defaultTypeName != null)
return defaultTypeName;
defaultTypeName = GetDefaultTypeName();
#if !NET_COMPACT_20 && TRACE_WARNING
DefaultTypeNameWarning(dbType, flags, defaultTypeName);
#endif
return defaultTypeName;
}
lock (_syncRoot)
{
if (_typeNames == null)
_typeNames = GetSQLiteDbTypeMap();
SQLiteDbTypeMapping value;
if (_typeNames.TryGetValue(dbType, out value))
return value.typeName;
}
#if !NET_COMPACT_20 && TRACE_WARNING
if ((flags & SQLiteConnectionFlags.TraceWarning) == SQLiteConnectionFlags.TraceWarning)
{
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"WARNING: Type mapping failed, returning default name \"{0}\" for type {1}.",
defaultTypeName, dbType));
}
return (defaultTypeName != null) ? defaultTypeName : GetDefaultTypeName();
return defaultTypeName;
}
/// <summary>
/// Convert a DbType to a Type
/// </summary>
/// <param name="typ">The DbType to convert from</param>
/// <returns>The closest-match .NET type</returns>
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// do nothing.
}
return false;
}
/// <summary>
/// For a given type name, return a closest-match .NET type
/// For a given textual database type name, return the "closest-match" database type.
/// This method is called during query result processing; therefore, its performance
/// is critical.
/// </summary>
/// <param name="connection">The connection context for custom type mappings, if any.</param>
/// <param name="name">The name of the type to match</param>
/// <param name="typeName">The textual name of the database type to match.</param>
/// <param name="flags">The flags associated with the parent connection object.</param>
/// <returns>The .NET DBType the text evaluates to.</returns>
internal static DbType TypeNameToDbType(
SQLiteConnection connection,
string name,
string typeName,
SQLiteConnectionFlags flags
)
{
DbType? defaultDbType = null;
if (connection != null)
{
flags |= connection.Flags;
if ((flags & SQLiteConnectionFlags.UseConnectionTypes) == SQLiteConnectionFlags.UseConnectionTypes)
{
SQLiteDbTypeMap connectionTypeNames = connection._typeNames;
if (connectionTypeNames != null)
{
if (name != null)
if (typeName != null)
{
SQLiteDbTypeMapping value;
if (connectionTypeNames.TryGetValue(name, out value))
if (connectionTypeNames.TryGetValue(typeName, out value))
{
return value.dataType;
}
else
{
int index = name.IndexOf('(');
int index = typeName.IndexOf('(');
if ((index > 0) &&
connectionTypeNames.TryGetValue(name.Substring(0, index).TrimEnd(), out value))
connectionTypeNames.TryGetValue(typeName.Substring(0, index).TrimEnd(), out value))
{
return value.dataType;
}
}
}
}
}
//
// NOTE: Use the default database type for the connection.
//
defaultDbType = connection.DefaultDbType;
}
if ((flags & SQLiteConnectionFlags.NoGlobalTypes) == SQLiteConnectionFlags.NoGlobalTypes)
{
return (defaultDbType != null) ? (DbType)defaultDbType : GetDefaultDbType();
if (defaultDbType != null)
return (DbType)defaultDbType;
defaultDbType = GetDefaultDbType();
#if !NET_COMPACT_20 && TRACE_WARNING
DefaultDbTypeWarning(typeName, flags, defaultDbType);
#endif
return (DbType)defaultDbType;
}
lock (_syncRoot)
{
if (_typeNames == null)
_typeNames = GetSQLiteDbTypeMap();
if (name != null)
if (typeName != null)
{
SQLiteDbTypeMapping value;
if (_typeNames.TryGetValue(name, out value))
if (_typeNames.TryGetValue(typeName, out value))
{
return value.dataType;
}
else
{
int index = name.IndexOf('(');
int index = typeName.IndexOf('(');
if ((index > 0) &&
_typeNames.TryGetValue(name.Substring(0, index).TrimEnd(), out value))
_typeNames.TryGetValue(typeName.Substring(0, index).TrimEnd(), out value))
{
return value.dataType;
}
}
}
}
#if !NET_COMPACT_20 && TRACE_WARNING
if (!String.IsNullOrEmpty(name) &&
((flags & SQLiteConnectionFlags.TraceWarning) == SQLiteConnectionFlags.TraceWarning))
{
Trace.WriteLine(String.Format(
CultureInfo.CurrentCulture,
"WARNING: Type mapping failed, returning default type {0} for name \"{1}\".",
defaultDbType, name));
}
return (defaultDbType != null) ? (DbType)defaultDbType : GetDefaultDbType();
return (DbType)defaultDbType;
}
#endregion
private static object _syncRoot = new object();
private static SQLiteDbTypeMap _typeNames = null;
}
|