public override bool Execute()
{
if (Input == null)
{
return(true);
}
Dictionary <string, ITaskItem> include = Include?.ToDictionary(inc => inc.ItemSpec);
Dictionary <string, ITaskItem> exclude = Exclude?.ToDictionary(ex => ex.ItemSpec);
Dictionary <string, ITaskItem> items = Items?.ToDictionary(item => item.ItemSpec);
// filter
var output = Input.Where(item => (include == null || include.ContainsKey(item.ItemSpec)) &&
(exclude == null || !exclude.ContainsKey(item.ItemSpec)));
// use items
if (items != null)
{
ITaskItem x;
output = output.Select(o => items.TryGetValue(o.ItemSpec, out x) ? x : o);
}
// filter Meta items
output = output.Where(item => (string.IsNullOrEmpty(Meta) || string.IsNullOrEmpty(item.GetMetadata(Meta)) || item.GetMetadata(Meta) == "false"));
Output = output.ToArray();
return(true);
}