How about the reflection variant? You won't need to edit any of the target
code.
Gary
On Sun, Jul 9, 2023, 09:51 Gilles Sadowski <gillese...@gmail.com> wrote:
> Hi.
>
> In the Javadoc of the "DiffBuilder" class[1]:
> ---CUT---
> [...]
> To use this class, write code as follows:
>
> public class Person implements Diffable<Person> {
> String name;
> int age;
> boolean smoker;
> [...]
> ---CUT---
>
> However, a common use-case would be that we can't directly
> modify the class whose instances we want to compare.
> Assuming that interfaces are given and non-modifiable (i.e.
> they cannot implement "Diffable"):
> ---CUT---
> public interface Content {
> double getValue();
> }
>
> public interface Container {
> Content[] getContentArray();
> }
> ---CUT---
> and the modifiable user code is similar to
> ---CUT---
> public class MyContent implements Content {
> private final double c;
>
> public MyContent(double input) {
> c = input:
> }
>
> @Override
> public double getValue() {
> return c;
> }
> }
>
> public class MyContainer implements Container {
> private final Content[] contentArr;
>
> MyContainer(double ... inputs) {
> final int len = inputs.length;
> contentArr = new Content[len];
> for (int i = 0; i < len; i++) {
> contentArr[i] = new MyContent(inputs[i]);
> }
> }
>
> @Override
> public Content[] getContentArray() {
> return contentArr;
> }
> }
> ---CUT---
> how should I go about in order to get the "diff" between instances
> of "MyContainer"?
>
> Thanks,
> Gilles
>
> [1]
> https://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/builder/DiffBuilder.html
>
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