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Determining which minimum banks are required for a function

How do you determine which banks are needed for such and such a function of the structure? For example, which banks are needed from all available for Spring to support only dependency injection?

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There are tools that create minimal JARs, calculating which classes are actually used in the application, statically analyzing the code, and then creating a new JAR containing only those classes. (I use Zelix Classmaster for this, but there are many alternatives.)

The problem with using these tools for a DI infrastructure like Spring includes:

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I once used some ftp help materials for a kind of "utility". It depended on some apache ftp jar. If you have never used ftp functions in a library, you will not need ftp jar, but static code analysis may say that you need it. This is what you need.

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