/// <summary>
/// We return null for the cache dependency since we cannot provide any absolute paths to files
/// </summary>
/// <param name="virtualPath"></param>
/// <param name="virtualPathDependencies"></param>
/// <param name="utcStart"></param>
/// <returns></returns>
public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
{
if (CodeDelegateVirtualPath.IsCodeDelegateVirtualPath(virtualPath))
{
return(null);
}
return(Previous.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart));
}
public static bool TryAdd(string virtualPathId, Func <object, string, string> codeDelegate)
{
if (!CodeDelegateVirtualPath.IsVirtualPathId(virtualPathId))
{
throw new FormatException("The virtualPathId passed in must be created by the GetOrCreateVirtualPathId method of the class " + typeof(CodeDelegateVirtualPath).FullName);
}
return(SnippetCollection.TryAdd(virtualPathId, codeDelegate));
}
//TODO: Test that invalidation recompiles a new assembly!
/// <summary>
/// Override the GetCacheKey to return a key for the virtual path that is unique to the timestamp that the code snippet
/// was registered, this allows for invalidating a code snippet item which will force a re-compile
/// </summary>
/// <param name="virtualPath"></param>
/// <returns></returns>
public override string GetCacheKey(string virtualPath)
{
if (CodeDelegateVirtualPath.IsCodeDelegateVirtualPath(virtualPath))
{
var virtualPathId = CodeDelegateVirtualPath.TryGetVirtualPathDefinition(
CodeDelegateVirtualPath.GetIdFromVirtualPath(virtualPath));
if (virtualPathId.Success)
{
//the id + the ticks will be unique
return(virtualPathId.Result.Key + virtualPathId.Result.Value.UtcTicks);
}
}
return(base.GetCacheKey(virtualPath));
}
/// <summary>
/// Returns the view resource stream
/// </summary>
/// <param name="virtualPath"></param>
/// <returns></returns>
public override VirtualFile GetFile(string virtualPath)
{
if (CodeDelegateVirtualPath.IsCodeDelegateVirtualPath(virtualPath))
{
//to get the file we need to get the id
var id = CodeDelegateVirtualPath.GetIdFromVirtualPath(virtualPath);
var def = CodeDelegateVirtualPath.TryGetVirtualPathDefinition(id);
if (def.Success)
{
return(new CodeDelegateVirtualFile(id, def.Result.Value.Parameter, virtualPath));
}
}
//let the base class handle this
return(Previous.GetFile(virtualPath));
}
public override bool FileExists(string virtualPath)
{
return(CodeDelegateVirtualPath.IsCodeDelegateVirtualPath(virtualPath) || (Previous != null && Previous.FileExists(virtualPath)));
}