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Your problem can be broken down into two parts:

• a sorting algorithm that takes a value from a given element
• a method to choose which value to extract, given a feature name

So something like (python-like pseudocode):

data = new MyDataStructure()
#Insert some values into it..
#...

def extract_feature(myObject, feature_name):
   return myObject.getFeature(feature_name)


print sorted(data, (key=lambda x: extract_feature(x))