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| Content Provider | ACM Digital Library |
|---|---|
| Author | Black, Andrew P. Ducasse, Stéphane Schärli, Nathanael |
| Abstract | Encapsulation in object-oriented languages has traditionally been based on static type systems. As a consequence, dynamically-typed languages have only limited support for encapsulation. This is surprising, considering that encapsulation is one of the most fundamental and important concepts behind object-oriented programming and that it is essential for writing programs that are maintainable and reliable, and that remain robust as they evolve. In this paper we describe the problems that are caused by insufficient encapsulation mechanisms and then present object-oriented encapsulation, a simple and uniform approach that solves these problems by bringing state of the art encapsulation features to dynamically typed languages. We provide a detailed discussion of our design rationales and compare them and their consequences to the encapsulation approaches used for statically typed languages. We also describe an implementation of object-oriented encapsulation in Smalltalk. Benchmarks of this implementation show that extensive use of object-oriented encapsulation results in a slowdown of less than 15 percent. |
| Starting Page | 130 |
| Ending Page | 149 |
| Page Count | 20 |
| File Format | |
| ISSN | 03621340 15581160 |
| DOI | 10.1145/1035292.1028988 |
| Journal | ACM SIGPLAN Notices (SIGP) |
| Volume Number | 39 |
| Issue Number | 10 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1983-05-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Encapsulation Smalltalk Encapsulation policies Information hiding Dynamic typing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Graphics and Computer-Aided Design Software |
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