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10:14.39 | groton | using Tomcat 6.0.20 (and its servlet2.5 jar), in my servlet i call HTTPServletRequestWrapper.getParameterMap().get("gene") and the return type is not a String but an Object. Why i need to cast? The documentation of Servlet 2.5 API states that the return type is a String. |
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18:19.10 | karstensrage | groton, getParameterMap just returns a Map |
18:21.52 | groton | karstensrage, yes, and the V and the K types are String's |
18:22.06 | karstensrage | says who? |
18:22.42 | groton | the documentation says that |
18:23.23 | karstensrage | where? |
18:23.24 | karstensrage | http://java.sun.com/products/servlet/2.5/docs/servlet-2_5-mr2/index.html |
18:23.32 | groton | karstensrage, i am mistake. K is String, and V is an array of String |
18:24.07 | karstensrage | groton, i think youre confused |
18:24.25 | karstensrage | or show me what *you* are reading |
18:24.30 | groton | karstensrage, "an immutable java.util.Map containing parameter names as keys and parameter values as map values. The keys in the parameter map are of type String. The values in the parameter map are of type String array." |
18:24.52 | karstensrage | right |
18:25.05 | karstensrage | but its not Generic'ized that way so you have to cast it |
18:25.51 | karstensrage | other wise the docuymentation would have the signature as java.util.Map<String, String []> or something |
18:26.51 | groton | karstensrage, no, the signature says of Map.get is: V get(Object), so clearly the returned type is a String[] |
18:26.55 | karstensrage | interesting.. so if it could be an array i guess you have to do 'get("gene")[0] |
18:27.01 | groton | yep |
18:27.21 | groton | thanks for the help karstensrage |
18:27.50 | karstensrage | np, but without a generic it *could* be anything, they are just sayign that they *do* put a String [] in there |
18:28.02 | groton | karstensrage, yes, i got your point |
18:28.07 | karstensrage | ok |
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