/// <summary>
/// Gets the attribute that has a given special role in the dataset.
/// </summary>
/// <param name="role">The attribute role. A non-standard role is expected.</param>
/// <returns>
/// Attribute instance, or null if no attribute in the dataset
/// has the specified role.
/// </returns>
/// <exception cref="ArgumentException">Invalid role specified.</exception>
public ObjectAttribute GetAttribute(AttributeRole role)
{
Assert.ArgumentNotNull(role, nameof(role));
ObjectAttribute attribute;
return(AttributesByRole.TryGetValue(role, out attribute)
? attribute
: null);
}
public static string GetName([NotNull] AttributeRole role)
{
string name;
if (!_roleNames.TryGetValue(role.Id, out name))
{
// get all public static fields
FieldInfo[] fieldInfos =
role.GetType().GetFields(BindingFlags.Public |
BindingFlags.Static);
// make sure all roles of the passed type are in the list
foreach (FieldInfo fieldInfo in fieldInfos)
{
var attributeRole = fieldInfo.GetValue(role) as AttributeRole;
if (attributeRole == null)
{
continue;
}
// the field is an AttributeRole, make sure it is in the dictionary
string existingName;
if (!_roleNames.TryGetValue(attributeRole.Id, out existingName))
{
// don't use add to avoid threading issues
_roleNames[attributeRole.Id] = string.Format(
"{0}.{1}",
attributeRole.GetType().Name,
fieldInfo.Name);
}
}
// try again after adding all
_roleNames.TryGetValue(role.Id, out name);
}
return(string.IsNullOrEmpty(name)
? string.Format("{0} id={1}", role.GetType().Name, role.Id)
: name);
}
private static void Add([NotNull] AttributeRole role)
{
_roles.Add(role.Id, role);
}
private static string GetDefaultTypeName([NotNull] AttributeRole role)
{
Assert.ArgumentNotNull(role, nameof(role));
return(AttributeRole.GetName(role));
}
public ObjectAttributeType([NotNull] string name, AttributeRole role)
: base(name)
{
_attributeRole = role;
}
public ObjectAttributeType(AttributeRole role)
: base(GetDefaultTypeName(role))
{
_attributeRole = role;
}