Xyseries to generic1

[rgwood-github2018dec31]

Overview: I changed XYseries to accept a list and functions as opposed to forcing clients to create multiple arrays on each create/update.

This is the beginning but I've run out of time tonight. The double[] constuctors still work but, wonce you move to jdk8 you can do something like:

class Foo { double x; double y; double bubbleSz; }

List list= ...
XYSeries ser=new XYSeries("s1", list, axisType
, (list, rowi, obj) -> { return ((Foo)obj).x; }
, (list, rowi, obj) -> { return ((Foo)obj).y; }
, (list, rowi, obj) -> { return ((Foo)obj).bubbleSz; }
);
Had to comment out some code as some libs didn't import into eclipse properly. Hope you can find the time to integrate this and update to jdk8. CHeers!

[timmolter]

I'm having a hard time understanding what this is doing better since I'm short on time to dedicate brain cells to it. Can you give me a quick summary?

[rgwood-github2018dec31]

No problem. The existing code requires one to create arrays to draw a chart. Often one already has say a List_T and so the array creation is not required. Also Let's sat T is:

class StockPrice { double price; double vol; Date dateTime}

Now one just needs to provide a few functions to turn each StockPrice into x and y to draw a graph.

Other than the first comment overview, what more did you wan to to know?

[tomassvensson]

What is the performance impact of this change from double[] arrays to Lists?

[rgwood-github2018dec31]

Hi Tomas. One issue with double[] is that you have to create it beforehand. For example, if one has: List<Foo> list= ... and: class Foo { double x, double y; } You have to: double[] arr=new double[list.size()]; // populate arr // chart But why? We already have the x and y values. We could allow anything that impls List<?> to be charted w/o creating a double[] or pre-populating it. For example, if I have a CSV, or table in a db, as long as I impl some list adapter I can chart it if the chart interface takes a List<?>

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-- R Garth Wood E: garth.wood@gmail.com <garth.wood@fullrank.com>, M: 416 930 2772

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