Is there any common function (in apache commons or similar) to make maps from query-parameter-like strings?
To specific:
Variant a (Querystring)
s="a=1&b=3"
=> Utils.mapFunction(s, '&', '=')
=> (Hash)Map { a:1; b:3 }
Variant b (Cachecontrol-Header)
s="max-age=3600;must-revalidate"
=> Utils.mapFunction(s, ';', '=')
=> (Hash)Map { max-age:3600; must-revalidate:true }
I don't want to reinvent the wheel.
Thanks
Try it out or browse the source code to see how it has been implemented.
Seems that a simple extension of HashMap would do it:
/**
* Simple demo of extending a HashMap
*/
public class TokenizedStringHashMap extends HashMap<String, String> {
void putAll(String tokenizedString, String delimiter) {
String[] nameValues = tokenizedString.split(delimiter);
for (String nameValue : nameValues) {
String[] pair = nameValue.split("=");
if (pair.length == 1) {
// Duplicate the key name if there is only one value
put(pair[0], pair[0]);
} else {
put(pair[0], pair[1]);
}
}
}
public static void main(String[] args) {
TokenizedStringHashMap example = new TokenizedStringHashMap();
example.putAll("a=1&b=3", "&");
System.out.println(example.toString());
example.clear();
example.putAll("max-age=3600;must-revalidate", ";");
System.out.println(example.toString());
}
}
