7,482 papers · page 292 of 375
The Relational Model first came into vogue in the early 1980's. It was based on the simplifying idea that all data could be modeled as mathematical relations (tables in "normal form"). Permissible operations on this table data structure were specified by the relation algebra and …
In an object-oriented programming language, method selection is (usually) done at run-time using the class of the receiver. Some object-oriented languages (such as CLOS) have multi-methods which comprise several methods selected on the basis of the runtime classes of all the para…
The Unified Method was launched by Grady Booch and Jim Rumbaugh at an OOPSLA'95 Conference Fringe meeting organised by Rational Software Corporation. In 1996 Unified Method was re-scoped to a notation, and renamed Unified Modeling Language (UML).Earlier this year, UML was submitt…
Most software development projects don't practice what is usually considered "proper" software engineering practices: well-documented, traceable requirements do not exist, formal inspections are non-existent, analysis and design inodels are incomplete or not even done at all, and…
The dramatic improvements in global interconnectivity due to intranets, extranets, and the Internet has led to an explosion in the number and variety of new data-intensive applications. Along with the proliferation of these new applications have come increased problems of scale. …
Patterns and frameworks are two approaches to the development of both new and evolving software systems. An implicit hypothesis is that are reduced by leveraging knowledge previously collected, analyzed, organized, and packaged. Discovery (or getting started costs) include both t…
Interprocedural analyses enable optimizing compilers to more precisely model the effects of non-inlined procedure calls, potentially resulting in substantial increases in application performance. Applying interprocedural analysis to programs written in object-oriented or function…
Open Implementation Analysis and Design (OIA/D) has been introduced as a design methodology for object-oriented software systems, and in particular for substrate software. In this paper we detail our experiences with using OIA/D to design and implement a common substrate componen…
The CORBA Event Service provides a flexible model for asynchronous communication among objects. However, the standard CORBA Event Service specification lacks important features required by real-time applications. For instance, operational flight programs for fighter aircraft have…
Finalization occurs when a garbage collector informs an application that an object is "almost collectable." It is used to help an application maintain its invariants. To make finalization more useful, this paper defines "almost collectable" in terms of a new class of objects, cal…
Over the past years, the Object Technology community has seen the birth of a number of new technology ideas that have changed the way we do computing. These ideas have affected compiler design, analysis approaches, project management techniques, user interface design, deployment …
A new garbage collection algorithm for distributed object systems, called DMOS (Distributed. Mature Object Space), is presented. It is derived from two previous algorithms, MOS (Mature Object Space), sometimes called the train algorithm, and PMOS (Persistent Mature Object Space).…
Squeak is an open, highly-portable Smalltalk implementation whose virtual machine is written entirely in Smalltalk, making it easy to. debug, analyze, and change. To achieve practical performance, a translator produces an equivalent C program whose performance is comparable to co…
A new visual notation is proposed for precisely expressing constraints on object-oriented models, as an alternative to mathematical logic notation used in methods such as Syntropy and Catalysis. The notation is potentially intuitive, expressive, integrates well with existing visu…
Object relationships in modem software systems are becoming increasingly numerous and complex. Programmers who try to find violations of such relationships need new tools that allow them to explore objects in a large system more efficiently. Many existing debuggers present only a…
Standard object-oriented languages do not provide language support for modeling changing collections of interdependent objects. We propose that R++, an integration of the rule and objectoriented paradigms, provides a mechanism for easily implementing such models. R++ extends C++ …
This paper explains how patterns can be used to describe the implementation of other patterns. It is demonstrated how certain design patterns can describe their own design. This is a fundamental reflexive relationship in pattern relationships. The process of assembling patterns b…
Two important problems of object-oriented reuse are the propagation of design and implementation specifics of the base software to the inheritors, and the protection of the inheritors against changes in the base software. In this paper, we argue that the simple inheritance rules …
The growing maturity of ODBMS technology is causing many enterprises to consider migrating relational databases to ODBIMS's. While data remapping is relatively straight-forward in most cases, greater challenges lie in economically and non-invasively adapting legacy application so…
In this paper, we present a technique to analyze and measure the reusability of object-oriented (OO) designs. The metrics can be incorporated into a design/development environment, so that reusability measurements, analysis, and improvements can be part of "business as usual" for…