How can I create a AutoValue class with generics?

Question

I would like to have a data class using AutoValue and one of the property is generic, wondering what I am doing wrong ?

public abstract class Data<T> {

    public static <T> Data createData(T value, Integer index) {
        return new AutoValue_Data<T>(value, index);
    }

    @NotNull
    public abstract T value();

    @NotNull
    public abstract Integer index();
}

score 2 · Accepted Answer · answered Dec 19 '20 at 22:50

2

Your code looks like it should work, with one line that should get a warning fixed:

public static <T> Data createData(T value, Integer index) {

should be

public static <T> Data<T> createData(T value, Integer index) {

answered Dec 19 '20 at 22:50

Louis Wasserman

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score 2 · Answer 2 · edited Dec 20 '20 at 13:17

2

You forgot generic T after Data, your code should be:

public abstract class Data<T> {

    public static <T> Data <T> createData(T value, Integer index) {
        return new AutoValue_Data<T>(value, index);
    }

    @NotNull
    public abstract T value();

    @NotNull
    public abstract Integer index();
}

edited Dec 20 '20 at 13:17

Mark Rotteveel

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answered Dec 20 '20 at 02:09

Chiara Tumminelli

362
2
12

How can I create a AutoValue class with generics?

2 Answers2