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TAP::Parser::ResultFactory

Perl 5 version 18.2 documentation
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TAP::Parser::ResultFactory

NAME

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

SYNOPSIS

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

VERSION

Version 3.26

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.

  1. 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:

  1. # create a custom result type:
  2. package MyResult;
  3. use strict;
  4. use vars qw(@ISA);
  5. @ISA = 'TAP::Parser::Result';
  6. # register with the factory:
  7. TAP::Parser::ResultFactory->register_type( 'my_type' => __PACKAGE__ );
  8. # use it:
  9. 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:

  1. package MyFooResult;
  2. TAP::Parser::ResultFactory->register_type( foo => __PACKAGE__ );

Of course, it's up to you to decide whether or not to ignore them.

Example

  1. package MyResultFactory;
  2. use strict;
  3. use vars '@ISA';
  4. use MyResult;
  5. use TAP::Parser::ResultFactory;
  6. @ISA = qw( TAP::Parser::ResultFactory );
  7. # force all results to be 'MyResult'
  8. sub class_for {
  9. return 'MyResult';
  10. }
  11. 1;

SEE ALSO

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