public CustomAttributeField(KeyTypeAttribute KeyType)
{
this.KeyType = KeyType;
}
/// <summary>
/// Loads the property map.
/// </summary>
/// <param name="propertyInfo">The proerty info.</param>
/// <returns>The property map for this property.</returns>
/// <exception cref="ArgumentException">Readonly and Editable attributes specified with opposing values.</exception>
public static PropertyMap LoadPropertyMap(PropertyInfo propertyInfo)
{
// if the property info is null or not mapped attribute present
// then return null
if (propertyInfo == null || propertyInfo.GetCustomAttribute <NotMappedAttribute>() != null)
{
return(null);
}
PropertyMap pm = new PropertyMap()
{
PropertyInfo = propertyInfo
};
// read custom attributes from property info
KeyAttribute key = propertyInfo.GetCustomAttribute(typeof(KeyAttribute)) as KeyAttribute;
KeyTypeAttribute keyType = propertyInfo.GetCustomAttribute(typeof(KeyTypeAttribute)) as KeyTypeAttribute;
ColumnAttribute column = propertyInfo.GetCustomAttribute(typeof(ColumnAttribute)) as ColumnAttribute;
ReadOnlyAttribute readOnly = propertyInfo.GetCustomAttribute(typeof(ReadOnlyAttribute)) as ReadOnlyAttribute;
EditableAttribute editable = propertyInfo.GetCustomAttribute(typeof(EditableAttribute)) as EditableAttribute;
RequiredAttribute required = propertyInfo.GetCustomAttribute(typeof(RequiredAttribute)) as RequiredAttribute;
DateStampAttribute dateStamp = propertyInfo.GetCustomAttribute(typeof(DateStampAttribute)) as DateStampAttribute;
SoftDeleteAttribute softDeleteAttribute = propertyInfo.GetCustomAttribute(typeof(SoftDeleteAttribute)) as SoftDeleteAttribute;
// check whether this property is an implied key
bool impliedKey = propertyInfo.Name == "Id" || $"{propertyInfo.DeclaringType.Name}Id" == propertyInfo.Name;
bool isKey = impliedKey || key != null || keyType != null;
// is this an implied or explicit key then set the key type
if (isKey)
{
// if key type not provided then imply key type
if (keyType == null)
{
if (propertyInfo.PropertyType == typeof(int))
{
// if integer then treat as identity by default
pm.KeyType = KeyType.Identity;
}
else if (propertyInfo.PropertyType == typeof(Guid))
{
// if guid then treat as guid
pm.KeyType = KeyType.Guid;
}
else
{
// otherwise treat as assigned
pm.KeyType = KeyType.Assigned;
}
}
else
{
pm.KeyType = keyType.KeyType;
}
}
// set remaining properties
pm.Column = column != null ? column.Name : propertyInfo.Name;
pm.IsRequired = required != null ? true : false;
pm.IsDateStamp = dateStamp != null ? true : false;
pm.InsertedValue = softDeleteAttribute?.ValueOnInsert;
pm.DeleteValue = softDeleteAttribute?.ValueOnDelete;
pm.IsSoftDelete = softDeleteAttribute != null;
// set read-only / editable
// if property is identity, guid or sequential key then cannot be
// editable and must be read-only
if (pm.KeyType == KeyType.Identity || pm.KeyType == KeyType.Guid || pm.KeyType == KeyType.Sequential)
{
pm.IsReadOnly = true;
pm.IsEditable = false;
}
else
{
// otherwise obey the attributes
pm.IsReadOnly = readOnly != null ? readOnly.IsReadOnly : false;
if (pm.IsReadOnly && editable == null)
{
pm.IsEditable = false;
}
else
{
pm.IsEditable = editable != null ? editable.AllowEdit : true;
}
}
// if editable and readonly conflict throw an error
if (pm.IsEditable && pm.IsReadOnly)
{
throw new ArgumentException("Readonly and Editable attributes specified with opposing values");
}
return(pm);
}