private static void checkGetAndIsVariants(
      Class containerClass,      String propertyName,      Method getMethod,      Method isMethod) {
   // Check the return types.  If they are the same, its ok.  If they are different   // we are in a situation where we could not reasonably know which to use.   
   
   if ( !isMethod.getReturnType().equals( getMethod.getReturnType() ) ) {
      throw new MappingException(
            String.format(
                  Locale.ROOT,                  "In trying to locate getter for property [%s], Class [%s] defined " +
                        "both a `get` [%s] and `is` [%s] variant",                  propertyName,                  containerClass.getName(),                  getMethod.toString(),                  isMethod.toString()
            )
      );   }
}

Mentioned ReflectHelper code is ^ and error is:

org.hibernate.MappingException: In trying to locate getter for property [b1], Class [com.sun.ts.tests.jpa.core.entitytest.cascadeall.oneXone.A] defined both a get [public com.sun.ts.tests.jpa.core.entitytest.cascadeall.oneXone.B com.sun.ts.tests.jpa.core.entitytest.cascadeall.oneXone.A.getB1()] and is [public boolean com.sun.ts.tests.jpa.core.entitytest.cascadeall.oneXone.A.isB1()] variant

The offending TCK source code is:

@OneToOne(targetEntity = com.sun.ts.tests.jpa.core.entitytest.cascadeall.oneXone.B.class, mappedBy = "a1", orphanRemoval = true)
protected B b1;

public B getB1()

public boolean isB1()

Apologies for pasting all of the above but it helps me to see it all together as one comment. 🙂

From the above pasted code + error, I think the test would pass if both methods returned either B or boolean but is that only a Hibernate requirement or is that also Persistence Specification requirement?

Could ReflectHelper be enhanced to handle ^ differently in JPA_COMPLIANCE mode?