static int number(String name)
    {
        return name.length() != 1 ? 0 : number(name.charAt(0));
    }
Used when the type is an interface (Collection/List/Set/SortedSet).

@author David Yu
@created Apr 24, 2012
protostuff-runtime/src/main/java/io/protostuff/runtime/PolymorphicCollectionSchema.java