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From Jörn Kottmann <kottm...@gmail.com>
Subject Re: Generification of FSIndex
Date Mon, 10 Aug 2009 20:10:53 GMT
Jörn Kottmann wrote:
> No I do not think that they could be changed to take type T.
> Lets take the case of the contains method.
> The javadoc says:
> "Check if the index contains an element equal to the given feature 
> structure according to the
> ordering of the index. Note that this is in general not the same as 
> feature structure identity."
> and it for the param fs it says "The FS we're looking for.". There is 
> no place where
> it says that contains can only be called for FSes which have the type 
> of the index.
>
> The change of the parameter from FeatureStructure to T would also change
> the contract of the method a little, because then it would not be 
> possible anymore
> to pass a FeatureStructure which has not type T.
The java developers had similar case in the Collection interface.
Collection has a contains method which has still the signature 
contains(Object)
and not contains(E).

See here:
http://java.sun.com/javase/6/docs/api/java/util/Collection.html

Jörn

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