$metadata not working with native test models

Tried to test Person entity taken from olingo-jpa-processor-v4/jpa/odata-jpa-test/src/main/java/com/sap/olingo/jpa/processor/core/testmodel/Person.java

root URL it works perfectly

Collection is also works perfect

But $metadata not

Getting error OData Library: An exception without message text was thrown.

Onse deleting Persons entity and related classes, $metadata works again

[wog48]

It seems that an attribute of either Person.class or BusinessPartner.class has an annotation EdmAnnotation, which can be used to generate simple OData annotation, but corresponding definition of the OData annotations is missing. This is a bug, as you do not get a meaningful error message.

To solve the issue you have two options:

1. You do not need the OData annotation and remove EdmAnnotation
2. You want to keep the annotation and perform the following steps:
   • You download Org.OData.Core.V1.xml, store it e.g. under /src/main/resources/annotations
   • You create an extension of JPAEdmMetadataPostProcessor and override method provideReferences using the following code:

    String uri = "http://docs.oasisopen.org/odata/odata/v4.0/os/vocabularies/Org.OData.Core.V1.xml";
    IntermediateReferenceAccess reference = references.addReference(uri, "annotations/Org.OData.Core.V1.xml");
    reference.addInclude("Org.OData.Core.V1", "Core");

[wog48]

I have enhanced the error processing with version 0.2.7