Apache Olingo EdmSimpleTypeException problem

[Former Member]

Hello everyone,

I implemented an OData Service which is consumed by SAPUI5 on the frontend using Apache Olingo. That service works perfectly fine, as long as there is no ManyToOne-Relation in a JAP Entity. I access the Classiccars Derby Database of MyEclipse to test things out. Customers-Entity is ok, everything works fine with OData, because this Entity has an OneToMany Relation with Payments.

If I know want to access the Payment entity via OData (ManyToOne -> Customer) I get an SimpleTypeException:

"org.apache.olingo.odata2.api.edm.EdmSimpleTypeException",

"The type 'class org.globus.de.odataservice.data.dataobjects.Customer' of the value object is not supported."

That is not wrong, I know that my Customer Class is not an EdmSimepleType, therefore the Exception might be correct. But when I remove the relation in the Entity and try to access the data again, the same error comes for double, String, integer, no matter what type - I always get an EdmSimpleTypeException. Something is clearly going wrong here - this only occurs with ManyToOne-Releations.

Is there something I am missing in the Entity?

Here the code:

Payment-Entity

/**

* The persistent class for the PAYMENT database table.

*

*/

@Entity

public class Payment implements Serializable {

  private static final long serialVersionUID = 1L;

  @EmbeddedId

  private PaymentPK id;

  private double amount;

  private String paymentdate;

  //bi-directional many-to-one association to Customer

  @ManyToOne

  @JoinColumn(name="CUSTOMERNUMBER")

  private Customer customer;

  public Payment() {

  }

  public PaymentPK getId() {

  return this.id;

  }

  public void setId(PaymentPK id) {

  this.id = id;

  }

  public double getAmount() {

  return this.amount;

  }

  public void setAmount(double amount) {

  this.amount = amount;

  }

  public String getPaymentdate() {

  return this.paymentdate;

  }

  public void setPaymentdate(String paymentdate) {

  this.paymentdate = paymentdate;

  }

  public Customer getCustomer() {

  return this.customer;

  }

  public void setCustomer(Customer customer) {

  this.customer = customer;

  }

}

Related Customer Entity

/**

* The persistent class for the CUSTOMER database table.

*

*/

@Entity

public class Customer implements Serializable {

  private static final long serialVersionUID = 1L;

  @Id

  private int customernumber;

  private String addressline1;

  private String addressline2;

  private String city;

  private String contactfirstname;

  private String contactlastname;

  private String country;

  private double creditlimit;

  private String customername;

  private String phone;

  private String postalcode;

  private int salesrepemployeenumber;

  private String state;

  //bi-directional many-to-one association to Payment

  @OneToMany(mappedBy="customer")

  private List<Payment> payments;

  public Customer() {

  }

  public int getCustomernumber() {

  return this.customernumber;

  }

  public void setCustomernumber(int customernumber) {

  this.customernumber = customernumber;

  }

  public String getAddressline1() {

  return this.addressline1;

  }

  public void setAddressline1(String addressline1) {

  this.addressline1 = addressline1;

  }

  public String getAddressline2() {

  return this.addressline2;

  }

  public void setAddressline2(String addressline2) {

  this.addressline2 = addressline2;

  }

  public String getCity() {

  return this.city;

  }

  public void setCity(String city) {

  this.city = city;

  }

  public String getContactfirstname() {

  return this.contactfirstname;

  }

  public void setContactfirstname(String contactfirstname) {

  this.contactfirstname = contactfirstname;

  }

  public String getContactlastname() {

  return this.contactlastname;

  }

  public void setContactlastname(String contactlastname) {

  this.contactlastname = contactlastname;

  }

  public String getCountry() {

  return this.country;

  }

  public void setCountry(String country) {

  this.country = country;

  }

  public double getCreditlimit() {

  return this.creditlimit;

  }

  public void setCreditlimit(double creditlimit) {

  this.creditlimit = creditlimit;

  }

  public String getCustomername() {

  return this.customername;

  }

  public void setCustomername(String customername) {

  this.customername = customername;

  }

  public String getPhone() {

  return this.phone;

  }

  public void setPhone(String phone) {

  this.phone = phone;

  }

  public String getPostalcode() {

  return this.postalcode;

  }

  public void setPostalcode(String postalcode) {

  this.postalcode = postalcode;

  }

  public int getSalesrepemployeenumber() {

  return this.salesrepemployeenumber;

  }

  public void setSalesrepemployeenumber(int salesrepemployeenumber) {

  this.salesrepemployeenumber = salesrepemployeenumber;

  }

  public String getState() {

  return this.state;

  }

  public void setState(String state) {

  this.state = state;

  }

  public List<Payment> getPayments() {

  return this.payments;

  }

  public void setPayments(List<Payment> payments) {

  this.payments = payments;

  }

}

Sorry, highlighting is not working properly..

[mibo1]

Hi Tobias,

is this still an actual issue for you?

If yes, you could create an issue at official Olingo JIRA (https://issues.apache.org/jira/browse/OLINGO) for this.

But before you create an issue it would be nice if you could check whether this issue still exists in newest (2.0.2) version of Olingo.

Kind regards,

Michael

[Former Member]

Hi Michael,

the issue no longer exists, we managed to fix it. We completely rebuild the server side and coded the entities by hand. Generated entities still fail in terms of relations, but 'hand mades' do work.

But thanks for your advice!