By Johannes Sametinger
ISBN-10: 3642082998
ISBN-13: 9783642082993
ISBN-10: 3662033453
ISBN-13: 9783662033456
Software is never equipped thoroughly from scratch. To an exceptional quantity, current software program files (source code, layout records, etc.) are copied and tailored to slot new specifications. but we're faraway from the aim of constructing reuse the normal method of software program improvement. software program reuse is the method of making software program structures from current software program instead of construction them from scratch. software program reuse remains to be an rising self-discipline. it sounds as if in lots of diversified varieties from ad-hoc reuse to systematic reuse, and from white-box reuse to black-box reuse. many various items for reuse diversity from rules and algorithms to any records which are created in the course of the software program lifestyles cycle. resource code is most ordinarily reused; hence many folks misconceive software program reuse because the reuse of resource code on my own. lately resource code and layout reuse became well-liked by (object-oriented) category libraries, software frameworks, and layout styles. software program elements supply a car for deliberate and systematic reuse. The software program group doesn't but agree on what a software program part is precisely. these days, the time period part is used as a synonym for item as a rule, however it additionally stands for module or functionality. lately the time period component-based or component-oriented software program improvement has be come well known. during this context elements are outlined as gadgets plus a few factor. What whatever is precisely, or should be for potent software program strengthen ment, is still but to be obvious. even though, platforms and versions are rising to aid that notion.
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Extra info for Software Engineering with Reusable Components
Sample text
Source code, documentation, designs, specifications, objects, text and architectures. Source code is the most common reuse product. However, higher increases in productivity will result from reusing higher levels of abstraction. This can mean that source code is generated automatically from higher levels of abstractions. The abstraction level of the source code also plays a major role in the benefit of the reuse process. For example, object-oriented programming techniques allow the construction of application frameworks that facilitate not only source code reuse but also design reuse.
52 Many nontechnical aspects have to be considered in order to improve systematic software reuse and to make it the normal way of software creation. Technical aspects are important prerequisites for successful reuse. However, they do not suffice to make software reuse happen. Systematic reuse requires long-term, top-down management support because [FI94]: - years of investment may be required before it pays off, - legal issues may have to be considered, and - changes in organizational funding and management structures may be necessary.
They can help both in improving the development process and in recapturing design decisions behind the structure of certain parts in a system. We see design patterns as a means of transferring design knowledge. Thus design patterns provide an efficient means of studying and later reusing the designs of experienced software engineers. Patterns can help to improve productivity by shortening the learning curve for novice and intermediate programmers and by yielding simpler, more resilient systems [DS94].
Software Engineering with Reusable Components by Johannes Sametinger
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