New PDF release: Adaptive Object-Oriented Software: The Demeter Method with

By Karl Lieberherr

ISBN-10: 053494602X

ISBN-13: 9780534946029

This groundbreaking booklet offers a whole technique for adaptive programming in any object-oriented language. Lieberherr's approach presents a brand new method of object-oriented software layout that is going past item encapsulation and hard-coded navigation paths to accomplish extra versatile interactions between gadgets. Designers utilizing this adaptive technique paintings at a better, extra schematic point of abstraction to layout software program courses. Graph notation is used to symbolize the category constitution of this system, and a "propagation development" language describes easy methods to distribute significant equipment (including navigation) around the program's constitution. utilizing this technique, software program designers can create courses which are simply converted and adaptable as wishes evolve.

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Extra info for Adaptive Object-Oriented Software: The Demeter Method with Propagation Patterns: The Demeter Method with Propagation Patterns

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INTRODUCTION 4 advantage of object-oriented technology. The advantages of adaptiveness play a stronger role, the larger the class structures and the longer the software will live. Adaptive software has an e cient implementation, incurring no run-time costs over object-oriented software. Compilation of adaptive software into C++ is also fast. Maintainability is a key consideration because most costs associated with software products are incurred after the software has been put to use. Adaptive software improves maintainability because it is written at a higher level of abstraction.

This situation is illustrated in Fig. 5. Infinitely many class structures Adaptive Program satisfies selects denotes selects selects . . . . . . 5: An in nite family of programs denoted by an adaptive program Let us further illustrate the process of writing an adaptive program with an example. We are interested in computing the salaries of the top-level o cers in a conglomerate of companies. Statement of the computeSalary problem. , the o cers that work directly for the head company of the conglomerate and not for any of its subsidiaries.

This leads to programs with high entropy that are polluted by accidental details about the class structure. 4 shows a class structure (the full square) and four behaviors which have been written for various parts of the class structure. 3. ADAPTIVE PROGRAMMING 7 and the fourth behavior (f4) uses the top two thirds. The part of the class structure that is in the center is encoded four times into the methods that implement the four behaviors! Should there be a change to the class structure in the center area, we would have to update the four behaviors!

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Adaptive Object-Oriented Software: The Demeter Method with Propagation Patterns: The Demeter Method with Propagation Patterns by Karl Lieberherr

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