The Strike of OO Component Composability Issues in Object-Oriented Programming

Building software from reusable components is considered impor-tant in reducing development costs. Object-oriented languages such as C++, Smalltalk, and Java, however, are not capable of expressing certain aspects of applications in a composable way. Software engi-neers may experience difficulties in composing applications from components, for example if components implement code for multi-ple views, dynamic inheritance, and synchronization [1]. If these as-pects have to be programmed, then object-oriented languages may require a considerable amount of redefinition although this may not be intuitively necessary. To solve the composability problems, lan-guages must be enhanced modularly without losing their basic char-acteristics. In addition, since more than one problem can be experienced for the same object, enhancements must be independent from each other. We have extended the conventional object-oriented model using the concept of composition-filters. Composition-filter