[Org-jutil-devel] FileSet works

[Marko v. D. <Mar...@cs...>]

After throwing over the design a few times, I got a pretty nice implementation 
of FileSet. I changed Predicate into an interface while doing so, I needed 
multiple interface inheritance since it was impractical for LocalDisk and 
PatternPredicate to have a common superclass. I still needs to add some docs 
and specs though.

The principle is as follows. 

a) you make a FileSet object
b) you add FileSetPredicates to it using include() and exclude()
A FileSetPredicate is a special predicate needed to make the process 
efficient. They can contain any ordinary predicate (they are predicate 
themselves), for example to check whether a file contains some word,....
c) you invoke getFiles() to get all the files in the FileSet

It is now in package org.jutil.java.io, but it has to move to 
org.jutil.io.fileset. Moving it to org.jutil.io will most likely turn io into 
the same mess that collections had become, and I want to avoid that.


Marko No. 5
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