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TAP::Parser::IteratorFUserrContributed Perl DocTAP::Parser::IteratorFactory(3)

NAME
       TAP::Parser::IteratorFactory - Figures out which SourceHandler objects
       to use for a given Source
VERSION
       Version 3.28
SYNOPSIS
         use TAP::Parser::IteratorFactory;
         my $factory = TAP::Parser::IteratorFactory->new({ %config });
         my $iterator  = $factory->make_iterator( $filename );
DESCRIPTION
       This is a factory class that takes a TAP::Parser::Source and runs it
       through all the registered TAP::Parser::SourceHandlers to see which one
       should handle the source.
       If you're a plugin author, you'll be interested in how to
       "register_handler"s, how "detect_source" works.
METHODS
   Class Methods
       "new"
       Creates a new factory class:
         my $sf = TAP::Parser::IteratorFactory->new( $config );
       $config is optional.  If given, sets "config" and calls
       "load_handlers".
       "register_handler"
       Registers a new TAP::Parser::SourceHandler with this factory.
         __PACKAGE__->register_handler( $handler_class );
       "handlers"
       List of handlers that have been registered.
   Instance Methods
       "config"
        my $cfg = $sf->config;
        $sf->config({ Perl => { %config } });
       Chaining getter/setter for the configuration of the available source
       handlers.  This is a hashref keyed on handler class whose values
       contain config to be passed onto the handlers during detection &
       creation.  Class names may be fully qualified or abbreviated, eg:
         # these are equivalent
         $sf->config({ 'TAP::Parser::SourceHandler::Perl' => { %config } });
         $sf->config({ 'Perl' => { %config } });
       "load_handlers"
        $sf->load_handlers;
       Loads the handler classes defined in "config".  For example, given a
       config:
         $sf->config({
           MySourceHandler => { some => 'config' },
         });
       "load_handlers" will attempt to load the "MySourceHandler" class by
       looking in @INC for it in this order:
         TAP::Parser::SourceHandler::MySourceHandler
         MySourceHandler
       "croak"s on error.
       "make_iterator"
         my $iterator = $src_factory->make_iterator( $source );
       Given a TAP::Parser::Source, finds the most suitable
       TAP::Parser::SourceHandler to use to create a TAP::Parser::Iterator
       (see "detect_source").  Dies on error.
       "detect_source"
       Given a TAP::Parser::Source, detects what kind of source it is and
       returns one TAP::Parser::SourceHandler (the most confident one).  Dies
       on error.
       The detection algorithm works something like this:
         for (@registered_handlers) {
           # ask them how confident they are about handling this source
           $confidence{$handler} = $handler->can_handle( $source )
         }
         # choose the most confident handler
       Ties are handled by choosing the first handler.
SUBCLASSING
       Please see "SUBCLASSING" in TAP::Parser for a subclassing overview.
   Example
       If we've done things right, you'll probably want to write a new source,
       rather than sub-classing this (see TAP::Parser::SourceHandler for
       that).
       But in case you find the need to...
         package MyIteratorFactory;
         use strict;
         use vars '@ISA';
         use TAP::Parser::IteratorFactory;
         @ISA = qw( TAP::Parser::IteratorFactory );
         # override source detection algorithm
         sub detect_source {
           my ($self, $raw_source_ref, $meta) = @_;
           # do detective work, using $meta and whatever else...
         }
         1;
AUTHORS
       Steve Purkis
ATTRIBUTION
       Originally ripped off from Test::Harness.
       Moved out of TAP::Parser & converted to a factory class to support
       extensible TAP source detective work by Steve Purkis.
SEE ALSO
       TAP::Object, TAP::Parser, TAP::Parser::SourceHandler,
       TAP::Parser::SourceHandler::File, TAP::Parser::SourceHandler::Perl,
       TAP::Parser::SourceHandler::RawTAP, TAP::Parser::SourceHandler::Handle,
       TAP::Parser::SourceHandler::Executable

perl v5.16.3                      2013-05-02   TAP::Parser::IteratorFactory(3)