Calculus.java:39-50: The node method in this interface...

[0pdd]

The puzzle 449-96cd40b8 from #449 has to be resolved:

jpeek/src/main/java/org/jpeek/calculus/Calculus.java

Lines 39 to 50 in 18efdff

	* @todo #449:30min The `node` method in this interface was designed with only
	* XSL implementation in mind - it uses the `metric` parameter to select the
	* XSL file and uses that file to transform the `skeleton`. This makes Java
	* based implementations a little awkward because the `metric` parameter
	* becomes redundant: there is a Java implementation for each metric, and these
	* implementations already know which metric they are for. The question becomes
	* - how to select correct java implementation for a given metric and integrate
	* it seamlessly with XSL calculus in `XslReport`. One option could be removing
	* the `metric` parameter from the method and injecting a Calculus for a
	* concrete metric in `XslReport` directly. Another could be implementing
	* Chain Of Responsibility pattern. Decide on the best way to integrate Java
	* based Calculus with XSL based Calculus in `XslReport` and implement it.

The puzzle was created by yegor256 on 05-Feb-21.

Estimate: 30 minutes, role: DEV.

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