这是什么语法

filterer = new ProductByPriceFilterer(minimumPrice);
下面这一句，是什么语法
view.Filter = new Predicate<object>(filterer.FilterItem);
public class ProductByPriceFilterer
{
public decimal MinimumPrice
{
get;
set;
}
public ProductByPriceFilterer(decimal minimumPrice)
{
MinimumPrice = minimumPrice;
}
public bool FilterItem(Object item)
{
Product product = item as Product;
if (product != null)
{
if (product.UnitCost > MinimumPrice)
{
return true;
}
}
return false;
}
}