//! Leaves the visited entity
public virtual void Leave()
{
if(m_Target != null && m_Active)
{
m_Target = null;
VisitorManager.Instance().RemoveVisitor(this);
}
}
//! adds a child to the entity
public virtual void AddChild(Entity child)
{
if(child.GetParent() != null)
{
child.GetParent().RemoveChild(child);
}
m_aChildren.Add(child);
child.m_Parent = this;
}
//! recursive read from XML
void ReadEntity(XmlTextReader xmlReader, Entity parent)
{
Entity entity = null;
string entityTypeName = xmlReader.Name;
if (parent != null)
{
// create entity
string assemblyName = Assembly.GetExecutingAssembly().GetName().Name;
string fullTypeName = assemblyName + "." + entityTypeName;
entity = Assembly.GetExecutingAssembly().CreateInstance(fullTypeName) as Entity;
}
else
{
string thisTypeName = GetType().Name;
Debug.Assert(thisTypeName == entityTypeName, "Trying to load an entity of type " + entityTypeName + " into an " + thisTypeName);
entity = this;
}
// read children
while(xmlReader.Read())
{
if(xmlReader.NodeType == XmlNodeType.EndElement)
{
break;
}
else if(xmlReader.NodeType == XmlNodeType.Element)
{
if (xmlReader.Name == "Properties")
{
// read properties
PropertyStream stream = new PropertyStream();
stream.ReadFromXML(xmlReader, null);
entity.Serialize(stream);
}
else
{
ReadEntity(xmlReader, entity);
}
}
} // end while
if(parent != null)
{
// Add entity after it has been serialized to ensure proper event handling inside of AddChild()
parent.AddChild(entity);
}
}
//! removes a child from this entity
public virtual void RemoveChild(Entity child)
{
m_aChildren.Remove(child);
child.m_Parent = null;
}
//! Loads the entity and its hierarchy from an XML
public void LoadFromXML(string strPath, Entity parent)
{
XmlTextReader xmlReader = new XmlTextReader("Content/" + strPath);
while(xmlReader.Read())
{
if (xmlReader.NodeType == XmlNodeType.EndElement)
{
break;
}
else if (xmlReader.NodeType == XmlNodeType.Element)
{
ReadEntity(xmlReader, parent);
}
}
xmlReader.Close();
}
//! inserts a child into a specific index
public virtual void InsertChild(Entity child, int index)
{
if (child.GetParent() != null)
{
child.GetParent().RemoveChild(child);
}
m_aChildren.Insert(index, child);
child.m_Parent = this;
}
//! visits a particular entity
public virtual void Visit(Entity target)
{
Debug.Assert(target != null, "Cannot Visit a NULL entity");
m_Target = target;
VisitorManager.Instance().StartVisitor(this);
}
