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package TAP::Parser::ResultFactory; use strict; use warnings; use TAP::Parser::Result::Bailout (); use TAP::Parser::Result::Comment (); use TAP::Parser::Result::Plan (); use TAP::Parser::Result::Pragma (); use TAP::Parser::Result::Test (); use TAP::Parser::Result::Unknown (); use TAP::Parser::Result::Version (); use TAP::Parser::Result::YAML (); use base 'TAP::Object'; ############################################################################## =head1 NAME TAP::Parser::ResultFactory - Factory for creating TAP::Parser output objects =head1 SYNOPSIS use TAP::Parser::ResultFactory; my $token = {...}; my $factory = TAP::Parser::ResultFactory->new; my $result = $factory->make_result( $token ); =head1 VERSION Version 3.44 =cut our $VERSION = '3.44'; =head2 DESCRIPTION This is a simple factory class which returns a L<TAP::Parser::Result> subclass representing the current bit of test data from TAP (usually a single line). It is used primarily by L<TAP::Parser::Grammar>. Unless you're subclassing, you probably won't need to use this module directly. =head2 METHODS =head2 Class Methods =head3 C<new> Creates a new factory class. I<Note:> You currently don't need to instantiate a factory in order to use it. =head3 C<make_result> Returns an instance the appropriate class for the test token passed in. my $result = TAP::Parser::ResultFactory->make_result($token); Can also be called as an instance method. =cut sub make_result { my ( $proto, $token ) = @_; my $type = $token->{type}; return $proto->class_for($type)->new($token); } =head3 C<class_for> Takes one argument: C<$type>. Returns the class for this $type, or C<croak>s with an error. =head3 C<register_type> Takes two arguments: C<$type>, C<$class> This lets you override an existing type with your own custom type, or register a completely new type, eg: # create a custom result type: package MyResult; use strict; use base 'TAP::Parser::Result'; # register with the factory: TAP::Parser::ResultFactory->register_type( 'my_type' => __PACKAGE__ ); # use it: my $r = TAP::Parser::ResultFactory->( { type => 'my_type' } ); Your custom type should then be picked up automatically by the L<TAP::Parser>. =cut our %CLASS_FOR = ( plan => 'TAP::Parser::Result::Plan', pragma => 'TAP::Parser::Result::Pragma', test => 'TAP::Parser::Result::Test', comment => 'TAP::Parser::Result::Comment', bailout => 'TAP::Parser::Result::Bailout', version => 'TAP::Parser::Result::Version', unknown => 'TAP::Parser::Result::Unknown', yaml => 'TAP::Parser::Result::YAML', ); sub class_for { my ( $class, $type ) = @_; # return target class: return $CLASS_FOR{$type} if exists $CLASS_FOR{$type}; # or complain: require Carp; Carp::croak("Could not determine class for result type '$type'"); } sub register_type { my ( $class, $type, $rclass ) = @_; # register it blindly, assume they know what they're doing $CLASS_FOR{$type} = $rclass; return $class; } 1; =head1 SUBCLASSING Please see L<TAP::Parser/SUBCLASSING> for a subclassing overview. There are a few things to bear in mind when creating your own C<ResultFactory>: =over 4 =item 1 The factory itself is never instantiated (this I<may> change in the future). This means that C<_initialize> is never called. =item 2 C<TAP::Parser::Result-E<gt>new> is never called, $tokens are reblessed. This I<will> change in a future version! =item 3 L<TAP::Parser::Result> subclasses will register themselves with L<TAP::Parser::ResultFactory> directly: package MyFooResult; TAP::Parser::ResultFactory->register_type( foo => __PACKAGE__ ); Of course, it's up to you to decide whether or not to ignore them. =back =head2 Example package MyResultFactory; use strict; use MyResult; use base 'TAP::Parser::ResultFactory'; # force all results to be 'MyResult' sub class_for { return 'MyResult'; } 1; =head1 SEE ALSO L<TAP::Parser>, L<TAP::Parser::Result>, L<TAP::Parser::Grammar> =cut