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How to expose a Java interface type through jax-rs
@XmlRootElement
@JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)
@Data
public class SomeObject implements Serializable {

private static final long serialVersionUID = -3711391025272861884L;

private IInterface config;

@XmlElement
public IInterface getConfig() {
    return config;
}
}

@XmlRootElement
@JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)
@Data
public class SomeObject implements Serializable {

    private static final long serialVersionUID = -3711391025272861884L;

    private IInterface config;

    @XmlElement(type=IInterfaceImpl.class)
    public IInterface getConfig() {
        return config;
    }
}