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I need a mapping from a list of keys to a value. I know I could write my own code like this:
Map<Person, Map<Daytime, Map<Food, Integer>>> eaten = ...;
Now I want to have some get and put methods like these:
Integer numberOfEggsIAteInTheMorning = eaten.get(me, morning, scrambledEggs);
eaten.put(me, evening, scrambledEggs, 1);
Do you know of an existing class that has this kind of API? I’m too lazy of writing it myself. 😉
You can use
org.apache.commons.collections.keyvalue.MultiKeyfor that:Map<Multikey, Object>