public ReflectionTableColumn(IDatabaseDialect dialect, PropertyInfo prop, Type declaredColumnType, bool isNullable)
{
Property = prop ?? throw new ArgumentNullException(nameof(prop));
Dialect = dialect ?? throw new ArgumentNullException(nameof(dialect));
if (declaredColumnType == null)
{
throw new ArgumentNullException(nameof(declaredColumnType));
}
Name = dialect.GetAliasOrDefault(prop);
var clrType = GetClrType(declaredColumnType);
if (clrType == null)
{
throw new ArgumentNullException($"The declared column type does not implement IDbType<T>. Check { prop.ReflectedType.FullName }.{ prop.Name } and ensure that the column type { declaredColumnType.FullName } implements this interface.", nameof(declaredColumnType));
}
var columnType = new ReflectionColumnDataType(dialect, declaredColumnType, clrType);
var autoIncrAttr = dialect.GetDialectAttribute <AutoIncrementAttribute>(declaredColumnType)
?? dialect.GetDialectAttribute <AutoIncrementAttribute>(prop);
if (autoIncrAttr != null)
{
if (!ValidAutoIncrementTypes.Contains(columnType.DataType))
{
throw new ArgumentNullException($"The column { prop.ReflectedType.FullName }.{ prop.Name } is declared as being auto incrementing, which is not supported on a '{ columnType.DataType }' data type.", nameof(declaredColumnType));
}
AutoIncrement = new AutoIncrement(autoIncrAttr.InitialValue, autoIncrAttr.Increment);
}
Type = columnType;
IsNullable = isNullable;
}
public ReflectionColumnDataType(IDatabaseDialect dialect, Type columnType, Type clrType)
{
if (dialect == null)
{
throw new ArgumentNullException(nameof(dialect));
}
if (columnType == null)
{
throw new ArgumentNullException(nameof(columnType));
}
if (clrType == null)
{
throw new ArgumentNullException(nameof(clrType));
}
var attr = dialect.GetDialectAttribute <DeclaredTypeAttribute>(columnType);
if (attr == null)
{
throw new ArgumentException($"The column type { columnType.FullName } does not contain a definition for the dialect { dialect.GetType().FullName }");
}
var typeProvider = dialect.TypeProvider;
if (typeProvider == null)
{
throw new ArgumentException("The given dialect does not contain a valid type provider.", nameof(dialect));
}
var collationAttr = dialect.GetDialectAttribute <CollationAttribute>(columnType);
var typeMetadata = new ColumnTypeMetadata
{
ClrType = clrType,
Collation = collationAttr?.CollationName != null
? Option <Identifier> .Some(collationAttr.CollationName)
: Option <Identifier> .None,
DataType = attr.DataType,
IsFixedLength = attr.IsFixedLength,
MaxLength = attr.Length,
NumericPrecision = attr.Precision > 0 && attr.Scale > 0
? Option <INumericPrecision> .Some(new NumericPrecision(attr.Precision, attr.Scale))
: Option <INumericPrecision> .None,
};
var dbType = typeProvider.CreateColumnType(typeMetadata);
// map dbType to properties, avoids keeping a reference
TypeName = dbType.TypeName;
DataType = dbType.DataType;
Definition = dbType.Definition;
IsFixedLength = dbType.IsFixedLength;
MaxLength = dbType.MaxLength;
ClrType = dbType.ClrType;
NumericPrecision = dbType.NumericPrecision;
Collation = dbType.Collation;
}
/// <summary>
/// Provides schema override for a type.
/// </summary>
/// <param name="dialect">A dialect that the schema override applies to.</param>
/// <param name="type">The type of object that a schema override attribute may be applied to.</param>
/// <returns>A schema override for a type if available, otherwise <c>null</c>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="dialect"/> or <paramref name="type"/> is <c>null</c></exception>
public static string?GetSchemaOverride(this IDatabaseDialect dialect, Type type)
{
if (dialect == null)
{
throw new ArgumentNullException(nameof(dialect));
}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
var nameAttr = dialect.GetDialectAttribute <SchemaAttribute>(type);
return(nameAttr?.Schema);
}
/// <summary>
/// Provides an alias for a type, or the type name.
/// </summary>
/// <param name="dialect">A dialect that the alias applies to.</param>
/// <param name="type">The type of object that the attribute is applied to.</param>
/// <returns>An alias for a type if available, the type's name otherwise.</returns>
/// <exception cref="ArgumentNullException"><paramref name="dialect"/> or <paramref name="type"/> is <c>null</c>.</exception>
public static string GetAliasOrDefault(this IDatabaseDialect dialect, Type type)
{
if (dialect == null)
{
throw new ArgumentNullException(nameof(dialect));
}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
var aliasAttr = dialect.GetDialectAttribute <AliasAttribute>(type);
return(aliasAttr?.Alias ?? type.Name);
}
/// <summary>
/// Provides an alias for a property, or the property name.
/// </summary>
/// <param name="dialect">A dialect that the alias applies to.</param>
/// <param name="property">A property that may contain an alias attribute.</param>
/// <returns>A name that should be used for the property, which is an alias if one is available, or the property name otherwise.</returns>
/// <exception cref="ArgumentNullException"><paramref name="dialect"/> or <paramref name="property"/> is <c>null</c>.</exception>
public static string GetAliasOrDefault(this IDatabaseDialect dialect, PropertyInfo property)
{
if (dialect == null)
{
throw new ArgumentNullException(nameof(dialect));
}
if (property == null)
{
throw new ArgumentNullException(nameof(property));
}
var aliasAttr = dialect.GetDialectAttribute <AliasAttribute>(property);
return(aliasAttr?.Alias ?? property.Name);
}