package MooseX::AttributeHelpers::MethodProvider::ImmutableHash;
use Moose::Role;
our $VERSION = '0.24';
sub exists : method {
my ($attr, $reader, $writer) = @_;
return sub { CORE::exists $reader->($_[0])->{$_[1]} ? 1 : 0 };
}
sub defined : method {
my ($attr, $reader, $writer) = @_;
return sub { CORE::defined $reader->($_[0])->{$_[1]} ? 1 : 0 };
}
sub get : method {
my ($attr, $reader, $writer) = @_;
return sub {
if ( @_ == 2 ) {
$reader->($_[0])->{$_[1]}
} else {
my ( $self, @keys ) = @_;
@{ $reader->($self) }{@keys}
}
};
}
sub keys : method {
my ($attr, $reader, $writer) = @_;
return sub { CORE::keys %{$reader->($_[0])} };
}
sub values : method {
my ($attr, $reader, $writer) = @_;
return sub { CORE::values %{$reader->($_[0])} };
}
sub kv : method {
my ($attr, $reader, $writer) = @_;
return sub {
my $h = $reader->($_[0]);
map {
[ $_, $h->{$_} ]
} CORE::keys %{$h}
};
}
sub elements : method {
my ($attr, $reader, $writer) = @_;
return sub {
my $h = $reader->($_[0]);
map {
$_, $h->{$_}
} CORE::keys %{$h}
};
}
sub count : method {
my ($attr, $reader, $writer) = @_;
return sub { scalar CORE::keys %{$reader->($_[0])} };
}
sub empty : method {
my ($attr, $reader, $writer) = @_;
return sub { scalar CORE::keys %{$reader->($_[0])} ? 1 : 0 };
}
1;
__END__
=pod
=head1 NAME
MooseX::AttributeHelpers::MethodProvider::ImmutableHash
=head1 DESCRIPTION
This is a role which provides the method generators for
L<MooseX::AttributeHelpers::Collection::ImmutableHash>.
=head1 METHODS
=over 4
=item B<meta>
=back
=head1 PROVIDED METHODS
=over 4
=item B<count>
Returns the number of elements in the list.
=item B<empty>
If the list is populated, returns true. Otherwise, returns false.
=item B<exists>
Returns true if the given key is present in the hash
=item B<defined>
Returns true if the value of a given key is defined
=item B<get>
Returns an element of the hash by its key.
=item B<keys>
Returns the list of keys in the hash.
=item B<values>
Returns the list of values in the hash.
=item B<kv>
Returns the key, value pairs in the hash as array references
=item B<elements>
Returns the key, value pairs in the hash as a flattened list
=back
=head1 BUGS
All complex software has bugs lurking in it, and this module is no
exception. If you find a bug please either email me, or add the bug
to cpan-RT.
=head1 AUTHOR
Stevan Little E<lt>stevan@iinteractive.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2007-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut