I think the Map interface should have been composed of two interfaces, ReadableM... | Hacker News

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kilink on July 12, 2015 | parent | context | favorite | on: Immutable annotations for Java

I think the Map interface should have been composed of two interfaces, ReadableMap and WriteableMap. Then APIs could return ReadableMap, which would lack the mutator methods altogether.

dorgo on July 20, 2015 [–]

Then a Map would be a ReadableMap, but a ReadableMap wouldn't be a Map. If a method expects a Map, you would't be able to put a ReadableMap (or a WriteableMap) into it. My solution so far is to avoid to return a map or to expect a map as argument.

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