NAME

       Metabase::Fact::Hash - fact subtype for simple hashes

VERSION

       version 0.022

SYNOPSIS

         # defining the fact class
         package MyComment;
         use Metabase::Fact::Hash;
         our @ISA = qw/Metabase::Fact::Hash/;

         sub required_keys { qw/poster/ }

         sub optional_keys { qw/comment/ }

         sub content_metadata {
           my $self = shift;
           return {
             poster => [ '//str' => $self->content->{poster} ],
           };
         }

         sub validate_content {
           my $self = shift;
           $self->SUPER::validate_content; # required and optional keys

           # other analysis of values
         }

       ...and then...

         # using the fact class
         my $fact = MyFact->new(
           resource => 'RJBS/Metabase-Fact-0.001.tar.gz',
           content => {
             poster  => 'larry',
             comment => 'Metabase rocks!',
           }
         );

         $client->send_fact($fact);

DESCRIPTION

       Many (if not most) facts to be stored in a Metabase are just hashes of simple data.
       Metabase::Fact::Hash is a subclass of Metabase::Fact with most of the required Fact
       methods already implemented.  If you write your class as a subclass of
       Metabase::Fact::Hash, you can store simple hashes in it.

       You should implement "required_keys" and/or "optional_keys" as shown in the SYNOPSIS.  The
       superclass "valiate_content" will ensure that required keys exist and that only required
       an optional keys exist.  You may wish to subclass "validate_content" to validate the
       specific content of the hash given to the constructor.

       You may wish to implement a "content_metadata" method to generate metadata about the hash
       contents.

ATTRIBUTES

   Arguments provided to new
       resource

       required

       The canonical resource (URI) the Fact relates to.  For CPAN distributions, this would be a
       "cpan:///distfile/" URL.  (See URI::cpan.)

       content

       required

       A reference to the actual information associated with the fact.  The exact form of the
       content is up to each Fact class to determine.

METHODS

       For information on the methods provided by this class, see Metabase::Fact.

BUGS

       Please report any bugs or feature using the CPAN Request Tracker.  Bugs can be submitted
       through the web interface at <http://rt.cpan.org/Dist/Display.html?Queue=Metabase-Fact>

       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.

AUTHORS

       •   David Golden <dagolden@cpan.org>

       •   Ricardo Signes <rjbs@cpan.org>

       •   H.Merijn Brand <hmbrand@cpan.org>

COPYRIGHT AND LICENSE

       This software is Copyright (c) 2013 by David Golden.

       This is free software, licensed under:

         The Apache License, Version 2.0, January 2004