我想使用Glass Mapper创建一个自定义属性来获取Sitecore URL,因为无法使用SitecoreInfo(SitecoreInfoType.Url)
延迟加载属性,并且我们在加载映射项的URL时遇到一些性能问题,其中URL永远不会被使用。
这是我到目前为止所得到的:
public class SitecoreUrlConfiguration : AbstractPropertyConfiguration
{
public SitecoreInfoUrlOptions UrlOptions { get; set; }
public bool IsLazy { get; set; }
}
public class SitecoreUrlAttribute : AbstractPropertyAttribute
{
public SitecoreUrlAttribute()
{
this.IsLazy = true;
this.UrlOptions = SitecoreInfoUrlOptions.Default;
}
/// <summary>
/// Gets or sets a value indicating whether is lazy.
/// </summary>
public bool IsLazy { get; set; }
public SitecoreInfoUrlOptions UrlOptions { get; set; }
public override AbstractPropertyConfiguration Configure(PropertyInfo propertyInfo)
{
var config = new SitecoreUrlConfiguration();
this.Configure(propertyInfo, config);
return config;
}
public void Configure(PropertyInfo propertyInfo, SitecoreUrlConfiguration config)
{
config.UrlOptions = this.UrlOptions;
config.IsLazy = this.IsLazy;
base.Configure(propertyInfo, config);
}
}
public class SitecoreUrlMapper : AbstractDataMapper
{
public override object MapToProperty(AbstractDataMappingContext mappingContext)
{
var context = mappingContext as SitecoreDataMappingContext;
if (context == null)
{
throw new MapperException("Mapping Context is null");
}
var item = context.Item;
var scConfig = this.Configuration as SitecoreUrlConfiguration;
if (scConfig == null)
{
throw new MapperException("SitecoreUrlConfiguration is null");
}
var urlOptions = Utilities.CreateUrlOptions(scConfig.UrlOptions);
urlOptions.Language = null;
// now, what?
}
}
到目前为止,这么好。但是,我如何在映射器中延迟加载URL?有没有人有想法?
答案 0 :(得分:4)
我实际看到的唯一方法是映射Lazy<T>
并向该类添加一个新属性,该类在访问它时返回this的值。所以在你的映射器中,放置// now what?
的地方我将返回惰性字符串:
return new Lazy<string>(() => LinkManager.GetItemUrl(item, urlOptions));
然后在你的模型中,放上这两个属性:
[SitecoreUrl]
public Lazy<string> LazyUrl { private get; set; }
[SitecoreIgnore]
public virtual string Url
{
get
{
return this.LazyUrl.Value;
}
}
答案 1 :(得分:0)
您可以通过一些创造力和新的代表功能
来实现与此类似的功能在流畅的配置图中,类似的类型如下:
SitecoreType<IWhatever> sitecoreType = new SitecoreType<IWhatever>();
sitecoreType.Delegate(y => y.Url).GetValue(GetLazyUrl);
private LazyString GetLazyUrl(SitecoreDataMappingContext arg)
{
var item = context.Item;
return new LazyString(
() =>
{
// the necessary actions to get the url
});
}
public class LazyString : Lazy<string>
{
public LazyString(Func<string> valueFactory) : base(valueFactory)
{
}
public override string ToString()
{
return Value;
}
public static implicit operator string(LazyString lazyString)
{
return lazyString.Value;
}
}
它不是一个字符串,但出于许多应用程序的目的,它将表现得像一个。