Remove duplications in `XYPlot`

[j-mortara]

Class description

Class full name

org.jfree.chart.plot.XYPlot

Implemented variability :heavy_check_mark:

This class represents a plot using two axes.

Method level:

2 constructors

1. default constructor without parameters
2. constructor with parameters to build a plot

77 method variants

Class level: 2 subclasses, CombinedDomainXYPlot (domain axis shared) and CombinedRangeXYPlot (range axis shared).

Actual metrics

• cognitive complexity: 666
• duplicated blocks: 24

Visualization

• fade: cognitive complexity
• cracks: duplicated blocks

TODO

Extract duplicated blocks

• [ ] setDomainAxis duplicated in CategoryPlot → requires a lot of changes since it would require to generify all related methods to use Axis objects
• [x] setRangeAxis duplicated in CategoryPlot
• [ ] setRenderer duplicated in CategoryPlot → requires a lot of changes since there is no Renderer superclass or equivalent
• [ ] L1931-L2013 duplicated in FastScatterPlot
• [x] L1931-L2107 duplicated in CategoryPlot
• [x] L2450-L2461 duplicated in CategoryPlot
• [x] L2515-L2653 duplicated in CategoryPlot
• [x] L2694-L2735 duplicated in CategoryPlot
• [x] L2745-L2838 duplicated in CategoryPlot