[OLINGO-1616] Primary key corresponding to derived entity specified by IdClass not recognized

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: V2 2.0.13
• Component/s: odata2-core, odata2-jpa

Language

Java

• Assignee: Unassigned
• Reporter: Oliver
• Created: 09/Feb/24 10:38
• Updated: 09/Feb/24 10:38

Description

Example model slightly modified from JPA manual:

@Entity
public class Employee {
  @Id long empId;
  ...
}

@Entity
public class Department {
  @Id String depId;
  ...
}

public class DependentId {
  String dept; // matches name of @Id attribute and type of Department PK
  long  emp; // matches name of @Id attribute and type of Employee PK
}

@Entity
@IdClass(DependentId.class)
public class Dependent {
  @Id @ManyToOne Department dept;
  // id attribute mapped by join column default
  @Id @ManyToOne Employee emp;
  ...
}

Results in NPE:

java.lang.NullPointerException: Cannot invoke "org.apache.olingo.odata2.jpa.processor.api.model.JPAEdmKeyView.getEdmKey()" because "keyView" is null
        at org.apache.olingo.odata2.jpa.processor.core.model.JPAEdmEntityType$JPAEdmEntityTypeBuilder.build(JPAEdmEntityType.java:139) ~[olingo-odata2-jpa-processor-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.jpa.processor.core.model.JPAEdmEntitySet$JPAEdmEntitySetBuilder.build(JPAEdmEntitySet.java:89) ~[olingo-odata2-jpa-processor-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.jpa.processor.core.model.JPAEdmEntityContainer$JPAEdmEntityContainerBuilder.build(JPAEdmEntityContainer.java:117) ~[olingo-odata2-jpa-processor-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.jpa.processor.core.model.JPAEdmSchema$JPAEdmSchemaBuilder.build(JPAEdmSchema.java:120) ~[olingo-odata2-jpa-processor-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.jpa.processor.core.model.JPAEdmModel$JPAEdmModelBuilder.build(JPAEdmModel.java:61) ~[olingo-odata2-jpa-processor-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.jpa.processor.core.edm.ODataJPAEdmProvider.getSchemas(ODataJPAEdmProvider.java:284) ~[olingo-odata2-jpa-processor-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.core.edm.provider.EdmServiceMetadataImplProv.getDataServiceVersion(EdmServiceMetadataImplProv.java:108) ~[olingo-odata2-core-2.0.13.jar!/:2.0.13]
        at org.apache.olingo.odata2.api.processor.ODataSingleProcessor.readMetadata(ODataSingleProcessor.java:381) ~[olingo-odata2-api-2.0.13.jar!/:2.0.13]

Seems that when processing the Dependent Entity the primary keys are not recognized as keys because they are located on an association, so building the key view results in the NPE while no other primary keys are present.