[Feature Request]: "Convert Class to Record", "Convert Record to Class"

[GavinRay97]

JDK16 records are really nice to work with, it'd be great to be able to (at least in cases where it's supported) convert Class to Record to clean up code 😃

Example below -- the two being convertible between each other for instance:

How high is the barrier to entry for adding a new CodeAction refactoring suggestion so that they are available in VS Code? Is it reasonable for a random person to contribute the implementation?

record Person(String name, Integer age, String email) {
    void sayHello() {
        System.out.println("Hello");
    }
}

final class Person {
    private final String name;
    private final Integer age;
    private final String email;

    Person(String name, Integer age, String email) {
        this.name = name;
        this.age = age;
        this.email = email;
    }

    void sayHello() {
        System.out.println("Hello");
    }

    public String name() {
        return name;
    }

    public Integer age() {
        return age;
    }

    public String email() {
        return email;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) return true;
        if (obj == null || obj.getClass() != this.getClass()) return false;
        var that = (Person2) obj;
        return Objects.equals(this.name, that.name) &&
                Objects.equals(this.age, that.age) &&
                Objects.equals(this.email, that.email);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, age, email);
    }

    @Override
    public String toString() {
        return "Person[" +
                "name=" + name + ", " +
                "age=" + age + ", " +
                "email=" + email + ']';
    }
}

[rgrunber]

As per https://github.com/redhat-developer/vscode-java/issues/2053#issuecomment-899333351, I don't think this exists even in upstream JDT for us to just migrate over and use. So likely the work need to be done upstream first.

[Claudio140]

Additionally, it would be nice to have the "Change method signature" refactoring be able to change the parameters of a record, similar to those of regular constructors.