PropertyAccessingMethodInterceptor not able to look up property for Kotlin property with interface-inherited accessor method

[RamsesGomez]

Just upgraded to spring boot 3.3.3 and I'm having a problem with Projections. I'm currently using
Spring Boot: 3.3.3
Kotlin: 2.0.20

Created a sample project to test it easily and on this one I decided to downgrade Koltin to version 1.9.25.

@Entity
@Table(name = "test")
class Entity(
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private val _id: Long? = null,

    val name: String
): Persistable<Long> {

    override fun getId(): Long? = _id

    override fun isNew(): Boolean = _id == null
}

interface Repository: JpaRepository<Entity, Long> {

    @Query("select e from Entity e")
    fun findAllProjections(): List<EntityProjection>
}


interface EntityProjection {
    val id: Long
    val name: String
}

For some reason with the new version. I cannot longer access the id using the EntityProjection interface. I get the error:

Invoked method is not a property accessor
java.lang.IllegalStateException: Invoked method is not a property accessor
	at org.springframework.data.projection.PropertyAccessingMethodInterceptor.invoke(PropertyAccessingMethodInterceptor.java:66)
	at org.springframework.data.projection.ProjectingMethodInterceptor.invoke(ProjectingMethodInterceptor.java:71)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)
	at org.springframework.data.projection.ProxyProjectionFactory$TargetAwareMethodInterceptor.invoke(ProxyProjectionFactory.java:243)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:223)
	at jdk.proxy3/jdk.proxy3.$Proxy157.getId(Unknown Source)
	at com.example.projections.RepositoryTest.test(RepositoryTest.kt:17)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)

If I force the version of data bom to 2024.0.2 everything works again and I'm able to access the id using the projection

[christophstrobl]

Thank you for getting in touch. Please share the entire sample (something that we can unzip or git clone, build, and deploy) that reproduces the problem.

[RamsesGomez]

Here you have, you can use the unit test reproduce it

projections.zip

[mp911de]

There are a few issues.

First, your property is named _id while the projection uses id as property name.

Secondly, Kotlin's ReflectJvmMapping doesn't return a getter for the property, so it resorts to use Persistable.getId() but that isn't the method that is being invoked, it is Entity.getId().

[mp911de]

Related to #3140