Spring RestTemplate dynamic JSON property name

Question

I need to consume an API which returns pages of objects using Spring RestTemplate. The problem is that the name of the JSON page property which holds the collection of objects is dynamic. How can I map this dynamic JSON prop to its static counterpart in my POJO?

Here's the pojo:

public class DTO<T> {
    private List<T> items;

    public List<T> getItems() {
        return items;
    }

    public DTO<T> setItems(List<T> items) {
        this.items = items;
        return this;
    }
}

Here's two examples of JSON:

{
    "forms": [{},{},{}]
}

{
    "submissions": [{},{},{}]
}

In the former case I need to map JSON forms onto POJO's items, in the latter - submissions onto items. How do I go about that?

Oğuzhan Aygün · Accepted Answer · 2018-11-23 14:09:40Z

2

try using maps like bellow

public class DTO<T> {
private Map<String,List<T>> items;

public Map<String,List<T>> getItems() {
    return items;
}

public DTO<T> setItems(Map<String,List<T>> items) {
    this.items = items;
    return this;
}
}

answered Nov 23, 2018 at 14:09

Oğuzhan Aygün

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Comments

super.t · Accepted Answer · 2018-11-26 12:48:02Z

0

I've just aliased the JSON field whose name can vary:

public class DTO<T> {
    private Integer prettyFieldId;
    private Integer pages;
    private Integer total;

    @JsonAlias({"forms", "submissions"})
    private List<T> items;

    //getters, setters
}

answered Nov 26, 2018 at 12:48

super.t

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