Convenience "Builder" for creating complex FileFilter conditions
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                 Key: IO-119
                 URL: https://issues.apache.org/jira/browse/IO-119
             Project: Commons IO
          Issue Type: Improvement
          Components: Filters
    Affects Versions: 1.3.1
            Reporter: Niall Pemberton
         Assigned To: Niall Pemberton
            Priority: Minor
             Fix For: 1.4


I'd like to add a new convenience "builder" class (FileFilterBuilder) to make 
it easier to create complex FileFilter using Commons IO's IOFileFilter 
implementations.

Heres an example of how it can be used to create a IOFileFilter for the 
following conditions:

 - Either, directories which are not hidden and not named ".svn"
 - or, files which have a suffix of ".java"

    IOFileFilter filter = FileFilterBuilder.orBuilder()
        .and().isDirectory().isHidden(false).not().name(".svn").end()
        .and().isFile().suffix(".java").end()
        .getFileFilter();


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