public static bool GetAttribute(MapNode node, out MapNode.Attribute attribute)
{
MapTree.AttributeSpec aspec = GetAttributeSpec(node.Tree);
if (aspec != null)
{
if (node.GetAttribute(aspec, out attribute))
{
return true;
}
}
attribute = MapNode.Attribute.Empty;
return false;
}
internal IChange CreateChange(MapNode node, AttributeChangeEventArgs e)
{
switch(e.ChangeType)
{
case AttributeChange.Added:
MapNode.Attribute att;
node.GetAttribute(e.AttributeSpec, out att);
return new AttributeAdd(node, att);
case AttributeChange.Removed:
return new AttributeDelete(node, new MapNode.Attribute(e.AttributeSpec, e.oldValue));
case AttributeChange.ValueUpdated:
return new AttributeUpdate(node, new MapNode.Attribute(e.AttributeSpec, e.oldValue));
default:
return null;
}
}
