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Test-Harness-3.19
River stage five • 212 direct dependents • 23305 total dependents
/ TAP::Parser::ResultFactory

NAME

TAP::Parser::ResultFactory - Factory for creating TAP::Parser output objects

SYNOPSIS

use TAP::Parser::ResultFactory;
my $token   = {...};
my $factory = TAP::Parser::ResultFactory->new;
my $result  = $factory->make_result( $token );

VERSION

Version 3.19

DESCRIPTION

This is a simple factory class which returns a TAP::Parser::Result subclass representing the current bit of test data from TAP (usually a single line). It is used primarily by TAP::Parser::Grammar. Unless you're subclassing, you probably won't need to use this module directly.

METHODS

Class Methods

new

Creates a new factory class. Note: You currently don't need to instantiate a factory in order to use it.

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.

class_for

Takes one argument: $type. Returns the class for this $type, or croaks with an error.

register_type

Takes two arguments: $type, $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 vars qw(@ISA);
@ISA = '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 TAP::Parser.

SUBCLASSING

Please see "SUBCLASSING" in TAP::Parser for a subclassing overview.

There are a few things to bear in mind when creating your own ResultFactory:

  1. The factory itself is never instantiated (this may change in the future). This means that _initialize is never called.

  2. TAP::Parser::Result->new is never called, $tokens are reblessed. This will change in a future version!

  3. TAP::Parser::Result subclasses will register themselves with 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.

Example

package MyResultFactory;

use strict;
use vars '@ISA';

use MyResult;
use TAP::Parser::ResultFactory;

@ISA = qw( TAP::Parser::ResultFactory );

# force all results to be 'MyResult'
sub class_for {
  return 'MyResult';
}

1;

SEE ALSO

TAP::Parser, TAP::Parser::Result, TAP::Parser::Grammar