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| #!/usr/bin/env perl
use v5.36;
# WeatherService クラス
# 国内天気サービス（統一インターフェースの基準）
package WeatherService {
use v5.36;
use Moo;
has 'name' => (is => 'ro', default => sub { '国内天気サービス' });
sub get_weather ($self, $city) {
my %weather_data = (
'東京' => { condition => '晴れ', temperature => 25 },
'大阪' => { condition => '曇り', temperature => 23 },
'札幌' => { condition => '雨', temperature => 18 },
);
return $weather_data{$city} // { condition => '不明', temperature => 0 };
}
sub show_weather ($self, $city) {
my $weather = $self->get_weather($city);
say "$city の天気: $weather->{condition}（気温: $weather->{temperature}℃）";
}
}
# OldWeatherAPI クラス
# レガシーな天気情報API
package OldWeatherAPI {
use v5.36;
use Moo;
sub fetch_weather_info ($self, $location) {
my %data = (
'東京' => '晴れ/25度',
'大阪' => '曇り/23度',
'名古屋' => '晴れ/26度',
);
return $data{$location} // '情報なし';
}
}
# OldWeatherAdapter クラス
# OldWeatherAPI用の橋渡しクラス
package OldWeatherAdapter {
use v5.36;
use Moo;
has 'old_api' => (is => 'ro', required => 1);
has 'name' => (is => 'ro', default => sub { 'レガシー天気API' });
sub get_weather ($self, $city) {
my $info = $self->old_api->fetch_weather_info($city);
if ($info eq '情報なし') {
return { condition => '不明', temperature => 0 };
}
my ($condition, $temp_str) = split '/', $info;
$temp_str =~ s/度$//;
return {
condition => $condition,
temperature => int($temp_str),
};
}
sub show_weather ($self, $city) {
my $weather = $self->get_weather($city);
say "$city の天気: $weather->{condition}（気温: $weather->{temperature}℃）";
}
}
# ForeignWeatherService クラス
# 海外天気情報サービス
package ForeignWeatherService {
use v5.36;
use Moo;
sub retrieve_conditions ($self, $city_code) {
my %data = (
'NYC' => ['Sunny', 20],
'LON' => ['Cloudy', 15],
'PAR' => ['Rainy', 12],
);
return $data{$city_code} // ['Unknown', 0];
}
sub city_codes ($self) {
return {
'ニューヨーク' => 'NYC',
'ロンドン' => 'LON',
'パリ' => 'PAR',
};
}
}
# ForeignWeatherAdapter クラス
# ForeignWeatherService用の橋渡しクラス
package ForeignWeatherAdapter {
use v5.36;
use Moo;
has 'foreign_service' => (is => 'ro', required => 1);
has 'name' => (is => 'ro', default => sub { '海外天気サービス' });
my %CONDITION_MAP = (
'Sunny' => '晴れ',
'Cloudy' => '曇り',
'Rainy' => '雨',
'Unknown' => '不明',
);
sub get_weather ($self, $city) {
my $codes = $self->foreign_service->city_codes;
my $city_code = $codes->{$city};
unless ($city_code) {
return { condition => '不明', temperature => 0 };
}
my $result = $self->foreign_service->retrieve_conditions($city_code);
my ($condition_en, $temp) = @$result;
my $condition_ja = $CONDITION_MAP{$condition_en} // '不明';
return {
condition => $condition_ja,
temperature => $temp,
};
}
sub show_weather ($self, $city) {
my $weather = $self->get_weather($city);
say "$city の天気: $weather->{condition}（気温: $weather->{temperature}℃）";
}
}
# メイン処理
package main {
use v5.36;
say "=== 複数サービス統合 天気情報ツール ===";
say "";
# 3つのサービスを準備（橋渡しクラスでラップ）
my @services = (
WeatherService->new,
OldWeatherAdapter->new(old_api => OldWeatherAPI->new),
ForeignWeatherAdapter->new(foreign_service => ForeignWeatherService->new),
);
# 各サービスの情報を表示
for my $service (@services) {
say "【" . $service->name . "】";
if ($service->name eq '海外天気サービス') {
$service->show_weather('ニューヨーク');
$service->show_weather('ロンドン');
$service->show_weather('パリ');
} else {
$service->show_weather('東京');
$service->show_weather('大阪');
}
say "";
}
say "--- 統一インターフェースの効果 ---";
say "・3つのサービスを同じメソッドで呼び出せる";
say "・ループで統一的に処理できる";
say "・新しいサービスの追加が容易";
}
|
