Java can't parse JSON generated by JSON.stringfy

Question

After upgrading from rc-1 to rc-3 the JSON.stringfy() method is returning values with \ at start and end of each value:

{
    \"perfil\":\"CLIENTE\", ...
}

How should I fix that?

code snippet:

post(url, data) {
    console.log(JSON.stringify(data));
    return Observable.create(observer =>
        this.http.post(this.restConfig.baseUrl + url, JSON.stringify(data), {
            headers: this.getDefaultHeaders()
        }).subscribe(
            data => this.next(observer, data)
            , err => {
                console.log(err);
                if (err.status === 401) {
                    this.redirectAuth();
                }
                observer.error(err);
            }
        )
    );
}

My Java RESTful services can't parse the output:

Unexpected token (VALUE_STRING), expected FIELD_NAME: missing property 'perfil' that is to contain type id  (for class br.com.inbit.medipop.model.entities.impl.Cliente) at [Source: java.io.ByteArrayInputStream@79f844cf; line: 1, column: 1]

class Cliente:

@Table
@Entity
@DiscriminatorValue("CLIENTE")
public class Cliente extends Usuario {

}

class Usuario:

@Table
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn(name = "perfil", discriminatorType = DiscriminatorType.STRING)
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "perfil")
@JsonSubTypes({
    @JsonSubTypes.Type(value = Administrador.class, name = "ADMIN"),
    @JsonSubTypes.Type(value = Colaborador.class, name = "COLABORADOR"),
    @JsonSubTypes.Type(value = Parceiro.class, name = "PARCEIRO"),
    @JsonSubTypes.Type(value = Cliente.class, name = "CLIENTE"),
    @JsonSubTypes.Type(value = Dependente.class, name = "DEPENDENTE")
})
public abstract class Usuario {

    @NotNull
    @Enumerated(EnumType.STRING)
    @Column(insertable = false, updatable = false)
    protected PerfilUsuario perfil;

    ...
}

data before stringfy:

{"perfil":"CLIENTE","pessoa":{"tipo":"FISICA","sexo":"MASCULINO","nome":"Marcos Kichel","cpf":"911.111.064-36","rg":"1234"},"dependentes":[],"email":"[email protected]"}

It's just escaping the quotes. Is it actually causing problems? — jonrsharpe
– jonrsharpe, Commented Jun 28, 2016 at 18:39

Jarod Moser · Accepted Answer · 2016-06-28 19:08:19Z

1

It seems that you are stringifying something that was already stringified. Take out the JSON.stringify() and you should be good to go.

answered Jun 28, 2016 at 19:08

Jarod Moser

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Comments

ikryvorotenko · Accepted Answer · 2016-06-28 19:08:14Z

0

The issue here actually not caused by escaped quotes, but the wrong data type of perfil field. In your java code it's expected to be an object, while in json you pass the String value "CLIENTE".

So either make sure you send an object within "perfil" field or change the type of perfil field from PerfilUsuario to String

edited Jun 28, 2016 at 19:08

answered Jun 28, 2016 at 19:01

ikryvorotenko

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1 Comment

Marcos J.C Kichel Over a year ago

Actually, it is an enum, as you can notice on the @Enumerated annotation above the field. Enums are parsed as String by the Jackson Body Writer, it is not the problem, but thanks for your help anyway

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