private static void InternalSetAttribute(this IAttributeItem item, Attribute value)
{
int index;
var att = GetAttribute(item, value.Key, out index);
if (att == null)
{
// Add attribute
if (item.Attributes != null && item.Attributes.Length > 0)
{
var atts = new Attribute[item.Attributes.Length + 1];
Array.Copy(item.Attributes, atts, item.Attributes.Length);
atts[atts.Length - 1] = value;
item.Attributes = atts;
}
else
{
item.Attributes = new[] { value };
}
}
else
{
// Replace attribute
var atts = item.Attributes;
atts[index] = value;
// Hack, damit das Objekt (z.B. SimpleMeasurement) die Änderungen mitbekommt und
// evtl. gecachte Daten wieder wegwirft (z.B. SimpleMeasurement._CachedTime)
item.Attributes = atts;
}
}
/// <summary>
/// Sets the <code>value</code> for the attribute with the key <code>key</code>.
/// </summary>
public static void SetAttribute(this IAttributeItem item, Attribute value)
{
if (value != null)
{
if (string.IsNullOrEmpty(value.Value))
{
RemoveAttribute(item, value.Key);
}
else
{
InternalSetAttribute(item, value);
}
}
}
/// <summary>
/// Removes the attribute with the key <code>key</code>
/// </summary>
public static void RemoveAttribute(this IAttributeItem item, ushort key)
{
int index;
var att = GetAttribute(item, key, out index);
if (att != null)
{
// Remove attribute
var atts = new Attribute[item.Attributes.Length - 1];
Array.Copy(item.Attributes, 0, atts, 0, index);
Array.Copy(item.Attributes, index + 1, atts, index, item.Attributes.Length - index - 1);
item.Attributes = atts;
}
}