/// <summary>
/// Initializes the iterator an returns the first element.
/// </summary>
/// <returns></returns>
public override RASTElement Begin()
{
// Initialize Iterator
PrepareFirst();
// Update item
m_item = m_node.GetChild(m_contextIndex, m_elementIndex);
return(m_item);
}
public override RASTElement Begin(object param = null)
{
int context = 0;
// Initialize context from method parameter
if (param != null)
{
if (param is int)
{
context = (int)param;
}
else if (param is ContextType)
{
context = m_node.MapContextToIndex((ContextType)param);
}
else
{
Console.WriteLine("WARNING!!! Iterator initialization didn't work as expected");
}
}
// Initialize Iterator
PrepareFirst(context);
// Update item
m_item = m_node.GetChild(m_contextIndex, m_elementIndex);
//Event Triggering
if (m_item != null)
{
// Prepare event information
RASTVisitorEventArgs args = new RASTVisitorEventArgs();
// Raise OnContextEnter and OnNodeEnter events
m_Event.OnContextEnter(m_item, args);
m_Event.OnNodeEnter(m_item, args);
}
return(m_item);
}
/// <summary>
/// This method provides configurable initialization of the iterator.
/// The default version works exactly as Begin(). It can be overriden
/// by a subclass if a configurable initialization is necessary
/// </summary>
/// <param name="param">The context either as an integer index or as ContextType parameter </param>
/// <returns>The first element in the context</returns>
public override RASTElement Begin(object param = null)
{
m_elementIndex = 0;
if (param is int)
{
m_contextIndex = (int)param;
}
else if (param is ContextType)
{
m_contextIndex = m_node.MapContextToIndex((ContextType)param);
}
else
{
return(base.Begin(param));
}
// Update item
m_item = m_node.GetChild(m_contextIndex, m_elementIndex);
return(m_item);
}
