JSON выбрасывает java.lang.StackOverflowError в select all - PullRequest
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JSON выбрасывает java.lang.StackOverflowError в select all

0 голосов
/ 26 ноября 2018

Здравствуйте, я пишу вам с вопросом

Ну, у меня есть java ee entity MestechnologyGroup , который подключен к MesTechnology .Я использую JPA и hibernate, и когда я хочу извлечь из базы данных json данные (выбрать все), браузер выдает меня

java.lang.StackOverflowError

Здесьявляется объектом MestechnologyGroup 

package pl.test.model;

import javax.persistence.*;
import java.util.Collection;

@Entity
public class Mestechnologygroup {
    private Integer idTechnologyGroup;
    private String name;
    private String description;
    private Integer number;
    private Collection<Mestechnology> mestechnologiesByIdTechnologyGroup;

    @Id
    @Column(name = "idTechnologyGroup")
    public Integer getIdTechnologyGroup() {
        return idTechnologyGroup;
    }

    public void setIdTechnologyGroup(Integer idTechnologyGroup) {
        this.idTechnologyGroup = idTechnologyGroup;
    }

    @Basic
    @Column(name = "Name")
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Basic
    @Column(name = "Description")
    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    @Basic
    @Column(name = "Number")
    public Integer getNumber() {
        return number;
    }

    public void setNumber(Integer number) {
        this.number = number;
    }


    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Mestechnologygroup that = (Mestechnologygroup) o;

        if (idTechnologyGroup != null ? !idTechnologyGroup.equals(that.idTechnologyGroup) : that.idTechnologyGroup != null)
            return false;
        if (name != null ? !name.equals(that.name) : that.name != null) return false;
        if (description != null ? !description.equals(that.description) : that.description != null) return false;
        if (number != null ? !number.equals(that.number) : that.number != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = idTechnologyGroup != null ? idTechnologyGroup.hashCode() : 0;
        result = 31 * result + (name != null ? name.hashCode() : 0);
        result = 31 * result + (description != null ? description.hashCode() : 0);
        result = 31 * result + (number != null ? number.hashCode() : 0);
        return result;
    }



    @OneToMany(mappedBy = "mestechnologygroupByIdTechnologyGroup")
    public Collection<Mestechnology> getMestechnologiesByIdTechnologyGroup() {
        return mestechnologiesByIdTechnologyGroup;
    }

    public void setMestechnologiesByIdTechnologyGroup(Collection<Mestechnology> mestechnologiesByIdTechnologyGroup) {
        this.mestechnologiesByIdTechnologyGroup = mestechnologiesByIdTechnologyGroup;
    }

}

и MesTechnology Entity 

    package pl.test.model;

import javax.persistence.*;
import java.util.Collection;

@Entity
public class Mestechnology {
    private Integer idTechnology;
    private Integer number;
    private String name;
    private Boolean state;
    private Collection<Mesattachmenttechnology> mesattachmenttechnologiesByIdTechnology;
    private Collection<Mesoperation> mesoperationsByIdTechnology;
    private Mestechnologygroup mestechnologygroupByIdTechnologyGroup;

    @Id
    @Column(name = "idTechnology")
    public Integer getIdTechnology() {
        return idTechnology;
    }

    public void setIdTechnology(Integer idTechnology) {
        this.idTechnology = idTechnology;
    }

    @Basic
    @Column(name = "number")
    public Integer getNumber() {
        return number;
    }

    public void setNumber(Integer number) {
        this.number = number;
    }

    @Basic
    @Column(name = "name")
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Basic
    @Column(name = "state")
    public Boolean getState() {
        return state;
    }

    public void setState(Boolean state) {
        this.state = state;
    }


    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Mestechnology that = (Mestechnology) o;

        if (idTechnology != null ? !idTechnology.equals(that.idTechnology) : that.idTechnology != null) return false;
        if (number != null ? !number.equals(that.number) : that.number != null) return false;
        if (name != null ? !name.equals(that.name) : that.name != null) return false;
        if (state != null ? !state.equals(that.state) : that.state != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = idTechnology != null ? idTechnology.hashCode() : 0;
        result = 31 * result + (number != null ? number.hashCode() : 0);
        result = 31 * result + (name != null ? name.hashCode() : 0);
        result = 31 * result + (state != null ? state.hashCode() : 0);
        return result;
    }

    @OneToMany(mappedBy = "mestechnologyByIdTechnology")
    public Collection<Mesattachmenttechnology> getMesattachmenttechnologiesByIdTechnology() {
        return mesattachmenttechnologiesByIdTechnology;
    }

    public void setMesattachmenttechnologiesByIdTechnology(Collection<Mesattachmenttechnology> mesattachmenttechnologiesByIdTechnology) {
        this.mesattachmenttechnologiesByIdTechnology = mesattachmenttechnologiesByIdTechnology;
    }

    @OneToMany(mappedBy = "mestechnologyByIdTechnology")
    public Collection<Mesoperation> getMesoperationsByIdTechnology() {
        return mesoperationsByIdTechnology;
    }

    public void setMesoperationsByIdTechnology(Collection<Mesoperation> mesoperationsByIdTechnology) {
        this.mesoperationsByIdTechnology = mesoperationsByIdTechnology;
    }

    @ManyToOne
    @JoinColumn(name = "idTechnologyGroup", referencedColumnName = "idTechnologyGroup", nullable = false)
    public Mestechnologygroup getMestechnologygroupByIdTechnologyGroup() {
        return mestechnologygroupByIdTechnologyGroup;
    }

    public void setMestechnologygroupByIdTechnologyGroup(Mestechnologygroup mestechnologygroupByIdTechnologyGroup) {
        this.mestechnologygroupByIdTechnologyGroup = mestechnologygroupByIdTechnologyGroup;
    }
}

TechnologyGroupRepositorum 

package pl.test.repo;

import com.sun.istack.internal.NotNull;
import pl.test.model.Mestechnologygroup;


import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.TypedQuery;
import javax.transaction.Transactional;

import java.util.List;

import static javax.transaction.Transactional.TxType.SUPPORTS;

@Transactional(SUPPORTS)
public class TechnologyGroupRepo {

    EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("testPU");
    EntityManager em = entityManagerFactory.createEntityManager();

    public List<Object[]> findById(@NotNull Integer id) {
        TypedQuery<Object[]> query = em.createQuery("select t.name, t.number, t.description from Mestechnologygroup t where t.idTechnologyGroup =:id" , Object[].class)
                .setParameter("id",id);
        return query.getResultList();
    }

    public List<Mestechnologygroup> findAll() {
        TypedQuery<Mestechnologygroup> query = em.createQuery("from Mestechnologygroup", Mestechnologygroup.class);
        return query.getResultList();
    }


//dodać dodawanie i deletowanie

}

TechnologyGroupEndpoint 

package pl.test.rest;


import io.swagger.annotations.Api;
import pl.test.model.Mestechnologygroup;
import pl.test.model.Mesusers;
import pl.test.repo.TechnologyGroupRepo;
import pl.test.repo.UserRepo;

import javax.inject.Inject;
import javax.validation.constraints.Min;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import java.util.List;

import static javax.transaction.Transactional.TxType.REQUIRED;
import static javax.transaction.Transactional.TxType.SUPPORTS;
import static javax.ws.rs.core.MediaType.APPLICATION_JSON;
@Api("technologygorup")
@Path("/tg")
public class TechnologyGroupEndpoint{

    @Inject
    private TechnologyGroupRepo technologyGroupRepo;


    @GET
    @Path("/{id : \\d+}")
    @Produces(APPLICATION_JSON)
    public Response getTechnologyGroup(@PathParam("id")  Integer id) {
        Object[] mestechnologygroup = technologyGroupRepo.findById(id).toArray();

        if (mestechnologygroup == null)
            return Response.status(Response.Status.NOT_FOUND).build();

        return Response.ok(mestechnologygroup).build();
    }

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getTechnologyGroups() {
        List<Mestechnologygroup> mestechnologygroups=technologyGroupRepo.findAll();

        if (mestechnologygroups.size() == 0)
            return Response.status(Response.Status.NO_CONTENT).build();

        return Response.ok(mestechnologygroups).build();
    }


}

серверные логи 

        at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:31)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.marshallProperty(ObjectSerializer.java:104)
    at org.eclipse.yasson.internal.serializer.ObjectSerializer.serializeInternal(ObjectSerializer.java:63)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serialize(AbstractContainerSerializer.java:64)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializerCaptor(AbstractContainerSerializer.java:96)
    at org.eclipse.yasson.internal.serializer.AbstractContainerSerializer.serializeItem(AbstractContainerSerializer.java:134)
    at org.eclipse.yasson.internal.serializer.CollectionSerializer.serializeInternal(CollectionSerializer.java:52)
]]

Ошибка, генерируемая браузером Ошибка Я быпризнателен за любую помощь

1 Ответ

0 голосов
/ 26 ноября 2018

MestechnologyGroup имеет коллекцию MesTechnology, которая имеет обратную ссылку на MestechnologyGroup.При сериализации он будет сериализовать MestechnologyGroup, где он найдет MesTechnology для сериализации, где он снова найдет MestechnologyGroup ... переполнение стека.

Добавьте @JsonbTransient на @ManyToOne, чтобы остановить его. 

@JsonbTransient
@ManyToOne
@JoinColumn(name = "idTechnologyGroup", referencedColumnName = "idTechnologyGroup", nullable = false)
public Mestechnologygroup getMestechnologygroupByIdTechnologyGroup() {
    return mestechnologygroupByIdTechnologyGroup;
}

У вас есть @OneToMany от Mestechnology до Mesattachmenttechnology и Mesoperation.Вам также нужно, чтобы Json проигнорировал сторону @ManyToOne в этих объектах.

...