CSC/ECE 517 Fall 2009/wiki3 5 SD: Difference between revisions
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= <center>'''Dependency inversion principle''' </center> = | = <center>'''Dependency inversion principle''' </center> = | ||
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== Introduction == | == Introduction == | ||
In conventional application architecture, lower-level components are designed to be consumed by higher-level components which enable increasingly complex systems to be built. In this composition, higher-level components depend directly upon lower-level components to achieve some task. This dependency upon lower-level components makes applications rigid, fragile and immobile. | In conventional application architecture, lower-level components are designed to be consumed by higher-level components which enable increasingly complex systems to be built. In this composition, higher-level components depend directly upon lower-level components to achieve some task. This dependency upon lower-level components makes applications rigid, fragile and immobile. | ||
Revision as of 04:08, 12 November 2009
Dependency inversion principle
Introduction
In conventional application architecture, lower-level components are designed to be consumed by higher-level components which enable increasingly complex systems to be built. In this composition, higher-level components depend directly upon lower-level components to achieve some task. This dependency upon lower-level components makes applications rigid, fragile and immobile.