NAME

File::Find::Object::Rule::Extending - the mini-guide to extending File::Find::Object::Rule

VERSION

version 0.0313

SYNOPSIS

    package File::Find::Object::Rule::Random;

    use strict;
    use warnings;

    # take useful things from File::Find::Object::Rule
    use base 'File::Find::Object::Rule';

    # and force our crack into the main namespace
    sub File::Find::Object::Rule::random () {
        my $self = shift()->_force_object;
        $self->exec( sub { rand > 0.5 } );
    }

    1;

DESCRIPTION

File::Find::Object::Rule inherits File::Find::Rule's extensibility. It is now possible to extend it, using the following conventions.

Declare your package

    package File::Find::Object::Rule::Random;

    use strict;
    use warnings;

Inherit methods from File::Find::Object::Rule

    # take useful things from File::Find::Object::Rule
    use base 'File::Find::Object::Rule';

Force your madness into the main package

    # and force our crack into the main namespace
    sub File::Find::Object::Rule::random () {
        my $self = shift()->_force_object;
        $self->exec( sub { rand > 0.5 } );
    }

Yes, we're being very cavalier here and defining things into the main File::Find::Object::Rule namespace. This is due to lack of imaginiation on my part - I simply can't find a way for the functional and oo interface to work without doing this or some kind of inheritance, and inheritance stops you using two File::Find::Object::Rule::Foo modules together.

For this reason try and pick distinct names for your extensions. If this becomes a problem then I may institute a semi-official registry of taken names.

Taking no arguments.

Note the null prototype on random. This is a cheat for the procedural interface to know that your sub takes no arguments, and so allows this to happen:

 find( random => in => '.' );

If you hadn't declared "random" with a null prototype it would have consumed "in" as a parameter to it, then got all confused as it doesn't know about a '.' rule.

NOTES ABOUT THE CALLBACK

The callback can access the File::Find::Object::Result using "$self->finder->item_obj()".

AUTHOR

Richard Clamp <richardc@unixbeard.net>

COPYRIGHT

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SUPPORT

Websites

The following websites have more information about this module, and may be of help to you. As always, in addition to those websites please use your favorite search engine to discover more resources.

MetaCPAN
A modern, open-source CPAN search engine, useful to view POD in HTML format.

<https://metacpan.org/release/File-Find-Object-Rule>
RT: CPAN's Bug Tracker
The RT ( Request Tracker ) website is the default bug/issue tracking system for CPAN.

<https://rt.cpan.org/Public/Dist/Display.html?Name=File-Find-Object-Rule>
CPANTS
The CPANTS is a website that analyzes the Kwalitee ( code metrics ) of a distribution.

<http://cpants.cpanauthors.org/dist/File-Find-Object-Rule>
CPAN Testers
The CPAN Testers is a network of smoke testers who run automated tests on uploaded CPAN distributions.

<http://www.cpantesters.org/distro/F/File-Find-Object-Rule>
CPAN Testers Matrix
The CPAN Testers Matrix is a website that provides a visual overview of the test results for a distribution on various Perls/platforms.

<http://matrix.cpantesters.org/?dist=File-Find-Object-Rule>
CPAN Testers Dependencies
The CPAN Testers Dependencies is a website that shows a chart of the test results of all dependencies for a distribution.

<http://deps.cpantesters.org/?module=File::Find::Object::Rule>

Bugs / Feature Requests

Please report any bugs or feature requests by email to "bug-file-find-object-rule at rt.cpan.org", or through the web interface at <https://rt.cpan.org/Public/Bug/Report.html?Queue=File-Find-Object-Rule>. You will be automatically notified of any progress on the request by the system.

Source Code

The code is open to the world, and available for you to hack on. Please feel free to browse it and play with it, or whatever. If you want to contribute patches, please send me a diff or prod me to pull from your repository :)

<https://github.com/shlomif/http://bitbucket.org/shlomif/perl-file-find-object-rule>

  git clone git://github.com/shlomif/http://bitbucket.org/shlomif/perl-file-find-object-rule.git

AUTHORS

Richard Clamp <richardc@unixbeard.net>
Andy Lester andy@petdance.com.

BUGS

Please report any bugs or feature requests on the bugtracker website <https://github.com/shlomif/http://bitbucket.org/shlomif/perl-file-find-object-rule/issues>

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

COPYRIGHT AND LICENSE

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.