public string GetPropertyValue(string propertyName)
{
if (_properties.IsDynamicProperty(propertyName))
{
string currentState = (string)_state[propertyName];
// check for circular references
if (currentState == PropertyDictionary.Visiting)
{
// Currently visiting this node, so have a cycle
throw PropertyDictionary.CreateCircularException(propertyName, _visiting);
}
_visiting.Push(propertyName);
_state[propertyName] = PropertyDictionary.Visiting;
string propertyValue = _properties.Lookup(propertyName);
if (propertyValue == null)
{
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1053"), propertyName));
}
Location propertyLocation = Location.UnknownLocation;
// TODO - get the proper location of the property declaration
propertyValue = _properties.ExpandProperties(propertyValue,
propertyLocation, _state, _visiting);
_visiting.Pop();
_state[propertyName] = PropertyDictionary.Visited;
return(propertyValue);
}
else
{
string propertyValue = _properties.Lookup(propertyName);
if (propertyValue == null)
{
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1053"), propertyName));
}
return(propertyValue);
}
}
