internal void Update(string uid, string propertyName, string value)
{
if (!_elementLookupTable.ContainsKey(uid))
{
// Add new element
Element element = new Element();
element.UId = uid;
Property property = new Property();
property.Name = propertyName;
property.Value = value;
element.Properties.Add(property);
// Update the state
_state.Elements.Add(element);
// Update the lookup table
_elementLookupTable.Add(element.UId, element);
return;
}
Element foundElement = _elementLookupTable[uid];
if (!Contains(foundElement, propertyName))
{
// Add new property
Property property = new Property();
property.Name = propertyName;
property.Value = value;
foundElement.Properties.Add(property);
return;
}
// Update or remove existing property.
Property foundProperty = GetProperty(foundElement, propertyName);
if (value == null)
foundElement.Properties.Remove(foundProperty);
else
foundProperty.Value = value;
}
private string GetValue(Element element, string propertyName)
{
foreach (Property property in element.Properties)
{
if (property.Name == propertyName)
{
return property.Value;
}
}
return string.Empty;
}
private Property GetProperty(Element element, string propertyName)
{
foreach (Property property in element.Properties)
{
if (property.Name == propertyName)
{
return property;
}
}
return null;
}
private bool Contains(Element element, string propertyName)
{
foreach (Property property in element.Properties)
{
if (property.Name == propertyName)
{
return true;
}
}
return false;
}