/// <summary>
/// <see cref="Karamem0.LinqToCalil.CalilLibraryResult.Geocode"/> プロパティの緯度を返します。
/// </summary>
/// <param name="target">図書館検索の実行結果を示す <see cref="Karamem0.LinqToCalil.CalilLibraryResult"/>。</param>
/// <returns>緯度を示す null 許容型の <see cref="System.Double"/>。</returns>
public static double?Latitude(this CalilLibraryResult target)
{
var match = Regex.Match(target.Geocode, "^(\\d+\\.?\\d*),(\\d+\\.?\\d*)$");
if (match.Success == true)
{
return(double.Parse(match.Groups[2].Value));
}
return(null);
}
/// <summary>
/// 指定した式ツリーを使用して図書館検索を実行します。
/// </summary>
/// <param name="expression">式ツリーを示す <see cref="System.Linq.Expressions.Expression"/>。</param>
/// <returns>実行結果を示す <see cref="System.Object"/>。</returns>
public override object Execute(Expression expression)
{
using (var client = new HttpClient()) {
var builder = new CalilLibraryExpressionBuilder()
{
AppKey = this.AppKey,
Format = this.Format,
};
var expr = builder.Create(expression);
var uri = new UriQueryParser(expr).Parse(this.BaseUriString);
var text = client.GetStringAsync(uri).Wait <string>();
if (text == null)
{
return(null);
}
return(CalilLibraryResult.Parse(text));
}
}