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# |
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# (c) Jan Gehring |
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# |
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# vim: set ts=3 sw=3 tw=0: |
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# vim: set expandtab: |
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=head1 NAME |
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WebService::ProfitBricks::Class - Class helper functions |
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=head1 DESCRIPTION |
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This is a module exporting some helper functions to ease the creation of objects. |
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=head1 SYNOPSIS |
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package My::Pkg; |
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use WebService::ProfitBricks::Class; |
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has_many foo => "My::Foo"; |
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belongs_to file => "My::File"; |
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# the constructor, to extend the provided constructor. |
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sub construct { |
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my ($self, @data) = @_; |
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} |
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=head1 EXPORTED FUNCTIONS |
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=over 4 |
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=cut |
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package WebService::ProfitBricks::Class; |
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use strict; |
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use warnings; |
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use Data::Dumper; |
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require Exporter; |
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use base qw(Exporter); |
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use vars qw(@EXPORT); |
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@EXPORT = qw(new attrs attr does has_many belongs_to serializer pluralize); |
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my %FUNC_MAP; |
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$FUNC_MAP{list} = sub { |
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my ($self, $caller_pkg, $option) = @_; |
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if(! exists $option->{through}) { |
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die("list: you have to define ,,through''."); |
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} |
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map { $_ = $caller_pkg->new(%{ $_ }) } $self->connection->call($option->{through}); |
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}; |
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$FUNC_MAP{find} = sub { |
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my ($self, $caller_pkg, $option, $search) = @_; |
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my $lookup_key = $option->{through}; |
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if(wantarray) { |
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grep { $_->$lookup_key eq $search } $self->list; |
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} |
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else { |
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[ grep { $_->$lookup_key eq $search } $self->list ]->[0]; |
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} |
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}; |
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=item new(%data) |
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A common constructor. It accepts an hash (key, values pairs) and stores this hash. If you need to do more, you can create a function I. |
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=cut |
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sub new { |
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my $that = shift; |
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my $proto = ref($that) || $that; |
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my $self = ref($that) ? $that : {}; |
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eval { |
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if($proto->SUPER) { |
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$self = $proto->SUPER::new(@_); |
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} |
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}; |
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bless($self, $proto); |
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$self->set_data({ @_ }); |
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eval { |
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$self->construct(@_); |
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}; |
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return $self; |
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} |
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=item has_many($what, $class, $options) |
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Create a relations to $class over $what. |
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=cut |
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sub has_many { |
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my ($what, $pkg_class, $options) = @_; |
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# disable warnings |
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no warnings; |
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141
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111
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my $what_pl = pluralize($what); |
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my ($caller_pkg) = caller; |
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my $through = $options->{through} || $what; |
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eval "use $pkg_class"; |
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if($@) { |
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die("has_many: no available class: $pkg_class found.\n$@"); |
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} |
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6
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no strict 'refs'; |
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3
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1
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610
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123
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124
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0
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my @old_relations = $caller_pkg->get_relations(); |
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126
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0
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*{ $caller_pkg . "::get_relations" } = sub { |
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my ($self) = @_; |
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return ({name => $what, through => $through}, @old_relations); |
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0
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}; |
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131
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# function to get related objects |
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0
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*{ $caller_pkg . "::" . $what_pl } = sub { |
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0
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my ($self) = @_; |
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135
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0
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my $current_data = $self->get_data; |
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137
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0
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my @data; |
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#print Dumper($self); |
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0
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0
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if(ref($through) eq "CODE") { |
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0
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@data = &{ $through }($self); |
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141
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} |
142
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else { |
143
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# if only one element is in the relation, it will be not a arrayRef... |
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0
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if(ref($current_data->{$through}) eq "HASH") { |
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$current_data->{$through} = [ $current_data->{$through} ]; |
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} |
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148
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0
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0
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@data = @{ $current_data->{$through} || [] }; |
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149
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} |
150
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151
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# only create a new object if $_ is a hashref |
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0
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return map { if(ref($_) eq "HASH") { $_ = $pkg_class->new(%{ $_ }) } else { $_ } } @data; |
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153
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0
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}; |
154
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155
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# function to add related objects |
156
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0
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*{ $caller_pkg . "::" . $what } = sub { |
157
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0
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0
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my ($self) = @_; |
158
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159
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0
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my ($pkg_name) = [ split(/::/, ref($self)) ]->[-1]; |
160
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0
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my $get_data_func_key = lcfirst($pkg_name) . "Id"; |
161
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162
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0
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my $obj = $pkg_class->new($get_data_func_key => $self->$get_data_func_key); |
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164
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0
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0
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if(ref($self->{__data__}->{$through}) eq "HASH") { |
165
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$self->{__data__}->{$through} = [ $self->{__data__}->{$through} ]; |
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} |
167
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168
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0
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push(@{ $self->{__data__}->{$through} }, $obj); |
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169
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0
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return $obj; |
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0
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}; |
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172
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1
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1
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8
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use strict; |
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2
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1
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161
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173
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} |
174
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175
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=item belongs_to($what, $class, $options) |
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177
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Creates a backward relaion to $class. |
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179
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=cut |
180
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sub belongs_to { |
181
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0
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0
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1
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my ($what, $pkg_class, $options) = @_; |
182
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183
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0
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my ($caller_pkg) = caller; |
184
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0
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0
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my $through = $options->{through} || $what; |
185
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186
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0
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eval "use $pkg_class"; |
187
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0
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0
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if($@) { |
188
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0
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die("belongs_to: no available class: $pkg_class found.\n$@"); |
189
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} |
190
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191
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1
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1
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6
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no strict 'refs'; |
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1
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2
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1
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98
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192
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193
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0
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*{ $caller_pkg . "::" . $what } = sub { |
194
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0
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0
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my ($self) = @_; |
195
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0
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return $pkg_class->new()->find_by_id($self->{__data__}->{$through}); |
196
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0
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}; |
197
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198
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1
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1
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5
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use strict; |
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1
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2
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1
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90
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199
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200
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} |
201
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202
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=item does($what, $option) |
203
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204
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=cut |
205
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sub does { |
206
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0
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0
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1
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my ($what, $option) = @_; |
207
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208
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0
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my ($caller_pkg) = caller; |
209
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210
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1
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1
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6
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no strict 'refs'; |
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1
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1
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1
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140
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211
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212
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0
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my $code = $FUNC_MAP{$what}; |
213
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214
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0
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0
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if(! $code) { |
215
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0
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die("does: $what not valid."); |
216
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} |
217
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218
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0
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*{ $caller_pkg . "::" . $what } = sub { |
219
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0
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0
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my ($self, @data) = @_; |
220
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221
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0
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0
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if(exists $option->{code}) { |
222
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0
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$code = $option->{code}; |
223
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0
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return &$code($self, @data); |
224
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} |
225
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226
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0
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return &$code($self, $caller_pkg, $option, @data); |
227
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0
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}; |
228
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229
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1
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1
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5
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use strict; |
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1
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2
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1
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78
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230
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} |
231
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232
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=item attr($attr, $option) |
233
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234
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Create a class attribute $attr. |
235
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236
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=cut |
237
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sub attr { |
238
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0
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0
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1
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my ($attr, $option) = @_; |
239
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0
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my ($caller_pkg) = caller; |
240
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241
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1
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1
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5
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no strict 'refs'; |
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1
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2
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1
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397
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242
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243
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0
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*{ $caller_pkg . "::" . $attr } = sub { |
244
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0
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0
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my ($self, $set) = @_; |
245
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0
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0
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if(defined $set) { |
246
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0
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$self->{__data__}->{$attr} = $set; |
247
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} |
248
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249
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0
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return $self->{__data__}->{$attr}; |
250
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0
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}; |
251
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252
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0
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0
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0
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if(exists $option->{searchable} && $option->{searchable}) { |
253
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0
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my ($pkg_name) = [ split(/::/, $caller_pkg) ]->[-1]; |
254
|
0
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|
my $find_key = lcfirst($pkg_name) . "Name"; |
255
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256
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0
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0
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if(exists $option->{find_by}) { |
257
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0
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|
$find_key = $option->{find_by}; |
258
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|
} |
259
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260
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0
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|
*{ $caller_pkg . "::find_by_" . $find_key } = sub { |
261
|
0
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0
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|
my ($self, $find) = @_; |
262
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263
|
0
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0
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|
|
if(exists $option->{through}) { |
264
|
0
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|
my $through = $option->{through}; |
265
|
0
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|
my $pl = pluralize(lcfirst($pkg_name)); |
266
|
0
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|
my @data = $self->$through->$pl(); |
267
|
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268
|
0
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0
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|
|
if(wantarray) { |
269
|
0
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|
|
return grep { $_->$find_key eq $find } @data; |
|
0
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|
270
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|
} |
271
|
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|
|
|
else { |
272
|
0
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|
|
|
return [ grep { $_->$attr eq $find } @data ]->[0]; |
|
0
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|
273
|
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|
|
} |
274
|
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|
|
} |
275
|
|
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|
|
|
|
#$self->connection->call(); |
276
|
0
|
|
|
|
|
|
}; |
277
|
|
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|
|
|
|
} |
278
|
|
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|
|
279
|
1
|
|
|
1
|
|
6
|
use strict; |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
76
|
|
280
|
|
|
|
|
|
|
|
281
|
|
|
|
|
|
|
} |
282
|
|
|
|
|
|
|
|
283
|
|
|
|
|
|
|
=item attrs(@attributes) |
284
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
Create multiple attributes for the class. |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
=cut |
288
|
|
|
|
|
|
|
sub attrs { |
289
|
0
|
|
|
0
|
1
|
|
my (@has) = @_; |
290
|
0
|
|
|
|
|
|
my ($caller_pkg) = caller; |
291
|
|
|
|
|
|
|
|
292
|
1
|
|
|
1
|
|
5
|
no strict 'refs'; |
|
1
|
|
|
|
|
3
|
|
|
1
|
|
|
|
|
105
|
|
293
|
|
|
|
|
|
|
|
294
|
0
|
|
|
|
|
|
for my $attr (@has) { |
295
|
0
|
|
|
|
|
|
*{ $caller_pkg . "::" . $attr } = sub { |
296
|
0
|
|
|
0
|
|
|
my ($self, $set) = @_; |
297
|
0
|
0
|
|
|
|
|
if(defined $set) { |
298
|
0
|
|
|
|
|
|
$self->{__data__}->{$attr} = $set; |
299
|
|
|
|
|
|
|
} |
300
|
|
|
|
|
|
|
|
301
|
0
|
|
|
|
|
|
return $self->{__data__}->{$attr}; |
302
|
0
|
|
|
|
|
|
}; |
303
|
|
|
|
|
|
|
} |
304
|
|
|
|
|
|
|
|
305
|
1
|
|
|
1
|
|
6
|
use strict; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
135
|
|
306
|
|
|
|
|
|
|
} |
307
|
|
|
|
|
|
|
|
308
|
|
|
|
|
|
|
=item serializer($type, $options) |
309
|
|
|
|
|
|
|
|
310
|
|
|
|
|
|
|
Sets a serializer for the class. |
311
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
This will create a method $class->to_$type([%data]). |
313
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
=cut |
315
|
|
|
|
|
|
|
sub serializer { |
316
|
0
|
|
|
0
|
1
|
|
my ($type, $options) = @_; |
317
|
|
|
|
|
|
|
|
318
|
0
|
|
|
|
|
|
my ($caller_pkg) = caller; |
319
|
|
|
|
|
|
|
|
320
|
0
|
|
|
|
|
|
my $pkg_class = "WebService::ProfitBricks::Serializer::$type"; |
321
|
0
|
|
|
|
|
|
eval "use $pkg_class"; |
322
|
0
|
0
|
|
|
|
|
if($@) { |
323
|
0
|
|
|
|
|
|
die("serializer: unknown class $pkg_class.\n$@"); |
324
|
|
|
|
|
|
|
} |
325
|
|
|
|
|
|
|
|
326
|
1
|
|
|
1
|
|
5
|
no strict 'refs'; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
122
|
|
327
|
0
|
|
|
|
|
|
*{ $caller_pkg . "::to_" . $type } = sub { |
328
|
0
|
|
|
0
|
|
|
my ($self, %data) = @_; |
329
|
0
|
|
|
|
|
|
my $serializer = $pkg_class->new(%{ $options }); |
|
0
|
|
|
|
|
|
|
330
|
0
|
0
|
|
|
|
|
if(keys %data) { |
331
|
0
|
|
|
|
|
|
return $serializer->serialize({ %data }); |
332
|
|
|
|
|
|
|
} else |
333
|
|
|
|
|
|
|
{ |
334
|
0
|
|
|
|
|
|
return $serializer->serialize($self->get_data); |
335
|
|
|
|
|
|
|
} |
336
|
0
|
|
|
|
|
|
}; |
337
|
1
|
|
|
1
|
|
5
|
use strict; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
727
|
|
338
|
|
|
|
|
|
|
} |
339
|
|
|
|
|
|
|
|
340
|
|
|
|
|
|
|
# simple pluralize |
341
|
|
|
|
|
|
|
sub pluralize { |
342
|
0
|
|
|
0
|
0
|
|
my ($name) = @_; |
343
|
|
|
|
|
|
|
|
344
|
0
|
0
|
|
|
|
|
if($name =~ m/s$/) { |
345
|
0
|
|
|
|
|
|
$name .= "es"; |
346
|
|
|
|
|
|
|
} |
347
|
|
|
|
|
|
|
else { |
348
|
0
|
|
|
|
|
|
$name .= "s"; |
349
|
|
|
|
|
|
|
} |
350
|
|
|
|
|
|
|
} |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
=back |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
=cut |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
"Use me, if you want to shoot your feet!"; |