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https://issues.apache.org/jira/browse/IO-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12496391
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Niall Pemberton commented on IO-119:
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Answering in reverse - orBuilder() and andBuilder() are static convenience
methods to create the initial builder.
FileFilterBuilder builder = FileFilterBuilder.orBuilder()
is the same as
FileFilterBuilder builder = new FileFilterBuilder(new OrFileFilter());
The problem is there is also a (non-static) or() method - so I couldn't name
them the same - suggesstions welcome :)
On the end() method - its like adding a closing bracket (where and() or or()
open them) - so if you wanted to do the following condition, using name() as an
example:
(A or (B and C) or (D and (E or F)))
you would do something like the following
FileFilterBuilder builder = FileFilterBuilder.orBuilder()
.name(A)
.and().name(B).name(C).end()
.and().name(D)
.or().name(E).name(F).endAll();
Its counter intuitive since usually the operators link conditions togther -
whereas here they're defined at the start and everything that follows until an
end(), or() or and() is joined with the same operator.
> Convenience "Builder" for creating complex FileFilter conditions
> ----------------------------------------------------------------
>
> 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
>
> Attachments: FileFilterBuilder.java, FileFilterBuilderTestCase.java
>
>
> 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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