Documentation

A notification in Siena is a set of named attributes. Event represents an event notification. Attribute names are standard C++ strings while attribute values are AttributeValues. A name uniquely identifies an attribute in an Event.

An Event is implemented as a map<string, AttributeValue>, therefore All the functions of the standard map template can be used to manipulate an Event. For instance:

    Event e;
    // ...
    // prints out attribute names of e
    //
    for(Event::iterator i = e.begin(); i != e.end(); ++i) cout << (*i).first;
    

Of course, every operation on an Event can take advantage of the access functions and assignment operators of AttributeValue.

    Event e;

    e["stock"] = "XYZ";
    e["price"] = 12.34
    e["quantity"] = 567;

    int q = e["quantity"];
    

The structure of names and types of an Event is completely arbitrary for Siena. In other words, Siena does not require any pre-defined attribute. It is up to applications to agree on sets of names, types, and semantics of attributes.

This class has no child classes.

See Also:

AttributeSet