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TAP::Parser::ResultFactory(3pm) Perl Programmers Reference Guide TAP::Parser::ResultFactory(3pm)

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 3.17

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 "croak"s 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

2009-06-12 perl v5.10.1