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Figure 9.4. Architecture for legacy application reengineering and reuse from Java.

In order to try out the code in this section and complete the exercise that

accompanies it, a COBOL compiler and runtime environment are needed. The COBOL

programs in this section, and in the solution to the exercise which accompanies it, were

written, compiled, and run using a student version of Micro Focus Net Express [37]. At

the time of this writing, no reasonably functional open source COBOL compiler was

available that could compile, link, and run even the most simple COBOL program given

in this section; this may have to do with the fact that COBOL remains a very lucrative

enterprise for many businesses, so there is little interest in giving away implementations

to the open source community. For example, the COBOL for GCC project has not made

significant progress yet on the code generation part of the compiler [36]. When and if an

open source COBOL compiler gets off the ground, it will be interesting to see what

features of the commercial COBOL compilers are implemented.

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