/// <summary>
/// Now walk the previously defined types and check each extends and implements
/// </summary>
public void WalkClassExtendation()
{
CheckerException exc = new CheckerException();
reorderedTypes = new List <TreeNode>(types);
for (int i = 0; i < types.Count; i++)
{
TreeNode n = types[i];
currentType = (UserType)n.Entry.ReflectionObject;
searchPath = (List <string>)((TreeNode)n.Parent.Parent).Entry.ReflectionObject;
searchPath.Add(currentType.Namespace);
Qualifier extends;
List <Qualifier> implements;
if (n.GetChild(2) != null)
{
if (n.GetChild(2).Type == VnvdTreeWalker.EXTENDS)
{
extends = AbstractHelper.GetFullQualifier(n.GetChild(2).GetChild(0));
if (n.GetChild(3) != null && n.GetChild(3).Type == VnvdTreeWalker.IMPLEMENTS)
{
implements = AbstractHelper.GetImplements(n.GetChild(3));
}
else
{
implements = new List <Qualifier>();
}
}
else if (n.GetChild(2).Type == VnvdTreeWalker.IMPLEMENTS)
{
implements = AbstractHelper.GetImplements(n.GetChild(2));
extends = new Qualifier()
{
"System", "Object"
};
}
else
{
extends = new Qualifier()
{
"System", "Object"
};
implements = new List <Qualifier>();
}
}
else
{
extends = new Qualifier()
{
"System", "Object"
};
implements = new List <Qualifier>();
}
try
{
IdEntry ext = this.GetTypeIdEntry(extends.ToString());
Type extType = (Type)ext.ReflectionObject;
if (currentType.IsInterface && ext.ReflectionObject != typeof(object) && !((Type)ext.ReflectionObject).IsInterface)
{
throw new CheckerException(n, "An interface can only extend another interface, not a class: " + ((Type)ext.ReflectionObject).FullName);
}
if (!currentType.IsInterface && !extType.IsClass)
{
throw new CheckerException(n, "Cannot extend interface or value type " + extType.FullName);
}
if (extType.IsSubclassOf(currentType))
{
throw new CheckerException(n, "Circular extendation detected at " + extType.FullName + " and " + currentType.FullName);
}
if (extType.IsSealed)
{
throw new CheckerException(n, "Cannot extend types marked as sealed: " + extType.FullName);
}
if (currentType.IsInterface && ext.ReflectionObject != typeof(object))
{
implements.Add(extends);
}
else if (!currentType.IsInterface && !currentType.IsEnum)
{
currentType.SetBaseType(ext);
}
for (int j = i + 1; j < reorderedTypes.Count; j++)
{
if (reorderedTypes[j].Entry.ReflectionObject == ext.ReflectionObject)
{
TreeNode temp = reorderedTypes[j];
reorderedTypes.Remove(temp);
reorderedTypes.Insert(i, temp);
}
}
}
catch (CheckerException ex)
{
exc.AddError(n, ex.GetLastError().Second);
}
try
{
foreach (var implement in implements)
{
IdEntry imple = this.GetTypeIdEntry(implement.ToString());
Type t = (Type)imple.ReflectionObject;
if (!t.IsInterface)
{
throw new CheckerException(n, "Cannot implement a class or value type " + t.FullName);
}
currentType.AddInterface(imple);
}
}
catch (CheckerException ex)
{
exc.AddError(n, ex.GetLastError().Second);
}
this.searchPath.Remove(currentType.Namespace);
}
if (exc.ErrorCount > 0)
{
throw exc;
}
}