This paper describes the design and implementation of a query engine that provides extended SQL-based access to the data managed by an object-oriented database system. This query engine allows extended SQL queries to be embedded in C++ programs or ...

Data files for scientific and engineering codes typically consist of a series of raw data values whose description is buried in the programs that interact with these files. In this situation, making even minor changes in the file structure or sharing ...

The pragmatic aspects of deploying large scale Object Oriented (OO) applications are examined. The focus is on identifying some of the main obstacles that arise in typical large scale OO projects, and offering hints about effective solutions. This The ...

SOM (IBM's System Object Model) removes a major impediment to reuse in Object-Oriented Programming by facilitating the programming of release-to-release binary compatible class libraries. This is accomplished by supporting a large number of ...

"Double, double toil and trouble, fire burn and cauldron bubble" … chant the witches of Macbeth. Take a corporation with a rich, decades-old history of providing on-line services on MVS mainframes, coupled with a vision of the future including OO ...

This paper presents the notion of problem-oriented object memory, and its realization in a distributed object-based programming system, Penumbra. This system allows location transparent object invocation, object migration and caching. Its distinguishing ...

The class and interaction structure of object-oriented designs may become fairly complex, and consequently difficult to develop and understand. Design patterns allow to govern this complexity. This paper presents the design process of a domain-specific ...

Framework programming is regarded as one the main advantages of object-oriented software engineering, and is expected to increase software reuse. In exploiting frameworks, however, programmers often face difficulties caused by the complexity of the ...

Object-oriented systems often exhibit idiomatic and recurring structures of objects and classes that solve particular design problems and make systems more flexible, elegant, and ultimately reusable. Design patterns have been proposed as one way to ...

Reflective programming languages are those where users' programs are allowed to customize in an organized way the behavior of the language to their own needs. For ten years now, most of the work on reflection revolved around the definition and the ...

This paper presents a metaobject protocol (MOP) for C++. This MOP was designed to bring the power of meta-programming to C++ programmers. It avoids penalties on runtime performance by adopting a new meta-architecture in which the metaobjects control the ...

A good reusable framework, pattern or module interface usually is represented by abstract classes. They form an abstract design and leave the implementation to concrete subclasses. The abstract design is instantiated by naming these subclasses. ...

Subject-oriented programming supports composition of object-oriented programs or program fragments called subjects. This paper presents an approach to the composition rules used to specify composition details. Rules can be generic, allowing different ...

The prototype-based programming model has always been difficult to characterize precisely. Its basic principle advocates concrete objects as the only mean to model concepts, yet current languages promote methodologies reintroducing abstract ...

Considerable progress has been made in understanding how to use subtyping in a way that facilitates modular reasoning. However, using subclassing in a way that facilitates modular reasoning is not well understood. Often methods must be overriden as a ...

Existing formalisms of inheritance are not sufficient to model the complexities of the kind of multiple inheritance exemplified in C++. Any satisfactory formalism must model the complicating effects of virtual and non-virtual base classes as well as ...