Initial draft for @lombok.experimental.Memoize

[nea89o]

This is an initial draft for how an @Memoize annotation could look like. It currently lacks features such as:

• Thread safety
• Cache invalidation
• Soft/Weak References for a lower memory profile
• Avoiding using a Map entirely for parameterless methods

Ideally at least some of these properties should be configurable using flags and/or annotation properties (some users might prefer a non thread safe cache for better performance).

Example Usage:

class Test {
    int invocationCount = 0;

    public static void main(String[] args) {
        Test test = new Test();
        System.out.println(test.x(1, 2));
        System.out.println(test.x(1, 2));
        System.out.println(test.x(1, 3));
        System.out.println("Invocation Count: " + test.invocationCount);
    }

    @lombok.experimental.Memoize
    public int x(int y, int z) {
        invocationCount++;
        return y + z;
    }
}