#include <TypeInfo.h>
Public Member Functions | |
bool | isA (TypeInfoPtr ti) |
Test whether this type inherits (directly or indirectly) from the specific class. | |
bool | safeIsA (TypeInfoPtr ti) |
This version of isA will not throw, but may return false-negatives if this type is unbound. | |
bool | isBound () |
Check the bound flag for this node; if false then recursivley check parents until an authorative is found. | |
bool | operator== (const TypeInfo &x) const |
efficent comparisom of types (uses type ids if possible) | |
bool | operator< (const TypeInfo &x) const |
efficent ordering of type (uses type ids if possible) | |
const std::string & | getName () const |
the unique type name (matches the Atlas type) | |
const TypeInfoSet & | getChildren () const |
int | getTypeId () const |
the integer type ID (may not be valid, but will be starting with Atlas 0.5x) | |
SigC::Signal0< void > & | getBoundSignal () |
obtain a reference to a signal that will be emitted when the type is bound. | |
StringSet | getParentsAsSet () |
Return the names of each direct parent class, as a set. | |
Protected Member Functions | |
TypeInfo (const std::string &id, TypeService *) | |
forward constructor, when data is not available | |
TypeInfo (const Atlas::Objects::Root &atype, TypeService *) | |
full constructor, if an INFO has been received | |
void | addParent (TypeInfoPtr tp) |
void | addChild (TypeInfoPtr tp) |
void | addAncestor (TypeInfoPtr tp) |
Recursive add to this node and every descendant the specified ancestor. | |
void | processTypeData (const Atlas::Objects::Root &atype) |
process the INFO data | |
void | validateBind () |
void | setupDepends () |
Compute the dependancies of this type. | |
Protected Attributes | |
TypeInfoSet | _parents |
The TypeInfo nodes for types we inherit from directly. | |
TypeInfoSet | _children |
TypeInfo nodes that inherit from us directly. | |
TypeInfoSet | _ancestors |
Every TypeInfo node we inherit from at all (must contain the root node, obviously). | |
bool | _bound |
cache the 'bound-ness' of the node, see the isBound() implementation | |
const std::string | _name |
the Atlas unique typename | |
int | _typeid |
Atlas 0.5.x type ID (or -1). | |
SigC::Signal0< void > | Bound |
Emitted when the type is bound, i.e there is an unbroken graph of TypeInfo instances through every ancestor to the root object. | |
TypeService * | _engine |
This class supports efficent inheritance queries, and traversal of the type hierarchy. Atlas types have a unique ID, and types can be retrieved using this value. Where an Atlas::Objects instance, or an Atlas::Message::Element representing an Atlas object is being examine, it is much more efficent to use the 'getSafe' methods rather than extracting PARENTS[0] and calling findSafe. This is because the getSafe methods may take advantage of integer type codes stored in the object, which avoids a map lookup to locate the type.
Note that the core Atlas::Objects heirarchy (as defined in the protocols/atlas/spec section of CVS) is loaded from the 'atlas.xml' file at startup, and that other types are queried from the server. In general, Eris will automatically delay processing operations and entities until the necessary type data has become available, without intervention by the client. However, certain routines may throw the 'OperationBlocked' exception, which must be forward to the Connection instance for handling.
|
obtain a reference to a signal that will be emitted when the type is bound. If the type is already bound, InvalidOperation will be thrown |
|
Test whether this type inherits (directly or indirectly) from the specific class. If this type is not bound, this will throw OperationBlocked with an appropriate wait. |
|
Compute the dependancies of this type. Basically we add ourselves to the dependant set of every currenly unbound parent. We will have validateBind() called that many times, and on the final call (whichever parent is bound last), we ouirselves will become bound. |