Development system with methods for runtime binding of user-defi

Details Development system with methods for runtime binding of user-defi Development system with methods for runtime binding of user-defi

1996-11-22

1999-09-14

Hafiz, Tariq R.

G06F 9445

Patent

active

059535245

ABSTRACT:
A multimedia application development system including an authoring environment and a runtime module for executing applications developed in the authoring environment is described. The system allows creation of customized objects (e.g., custom controls), by creating a user-defined class or "UDC." Typically, a UDC is created from one or more existing classes, inheriting, at least in part, behavior and functionality of those existing classes. The system provides methods where actual binding of properties and methods to an object instance of a class is deferred until runtime. With specific regard to UDC-created objects, the behaviors of parent classes are not bound to object instances at compile time. Instead, these behaviors are "late bound" by fetching them from the parent classes at runtime, on an "as needed" basis. Further, "which" particular parent classes are actually employed for this purpose at runtime can be altered, thereby providing further flexibility to the system. Since the UDC is bound only at runtime, the specific UDC actually employed can be changed up to the point of actual execution. As a result, the behavior for the object at runtime can be changed dramatically by simply re-directing the object to a different UDC (which may be one of many compatible UDCs). In this manner, the actual "context" of execution of an application at runtime depends on the particular context in which the application finds itself.

REFERENCES:
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patent: 5768588 (1998-06-01), Endicott et al.
patent: 5774725 (1998-06-01), Yadav et al.

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