Release 10.1A: OpenEdge Getting Started:
Object-oriented Programming

Using Progress.Lang.Class data members and methods

Progress.Lang.Class is a built-in Progress class that provides a common set of data members and methods that return type information about a class or interface. Progress.Lang.Class is FINAL and therefore it can not be inherited. Each Progress session contains a single Progress.Lang.Class instance for each type of class-based object instantited in the session. The lifetime of these objects is controlled by the Progress session; therefore, you cannot delete them. Table 4–1 describes the common data members and methods on Progress.Lang.Class.

Table 4–1: Progress.Lang.Class public data members and methods 

Data member or method	Description
PUBLIC TypeName AS CHARACTER	A read-only data member that contains the fully qualified class or interface type name. For example, "acme.myObjs.CustObj" (the sample class defined in the "Sample classes" section).
PUBLIC Package AS CHARACTER	A read-only data member that contains the package (relative directory) of the class or interface type name. For example, "acme.myObjs" (the sample package used in the "Sample classes" section).
PUBLIC SuperClass AS CLASS Progress.Lang.Class	A read-only data member that contains an object reference. This object reference represents the type of the super class if the current class type represents a subclass.
METHOD PUBLIC LOGICAL IsInterface ( )	Returns TRUE if the type is a definition for an interface, and FALSE if it is for a class.
METHOD PUBLIC LOGICAL IsFinal ( )	Returns TRUE if the type is defined as FINAL, and FALSE if it is not FINAL.