Parsing varargs as array with Jackson

Consider the following Java class where the setter for the author property accepts the values as varargs.

 1class Book {
 2  private String[] author;
 3
 4  public String[] getAuthor() {
 5    return this.author;
 6  }
 7
 8  public void setAuthor(String... author) {
 9    this.author = author;
10  }
11}

If you pass a single value of the author as follows, Jackson will throw an error.

1{
2  "author": "Jenny McLachlan"
3}

To enable Jackson accept a single value as an array, you can use @JsonFormat annotation as follows.

1class Book {
2  @JsonFormat(with = Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY)
3  private String[] author;
4
5  // getters, setters, etc.
6}