Is it possible to use Neo4j OGM Converter as a Spring #Component? - neo4j

Question

I have a custom converter annotated as a #Component and it depends on MyBean which is injected by Spring via #Autowired at boot time.
MyEntity has a field MyObject to be converted by that converter. OGM will call toEntityAttribute from MyObjectToStringConverter as soon as I retrieve MyEntity from Neo4j. However, I'm getting a NPE. It seems OGM does not reuse my converter created by Spring and MyBean dependency is always NULL.
Should OGM be able to get my converter from Spring context?
Is there a way MyBean could be initialized by OGM?
If not, can I register a converter by myselft?
#NodeEntity
class MyEntity {
#Convert(MyObjectToStringConverter.class)
private MyObject myObject;
...
}
#Component
class MyObjectToStringConverter implements AttributeConverter<MyObject, String> {
#Autowired
private MyBean myBean;
#Override
public String toGraphProperty(MyObject value) {
return value.getName();
}
#Override
public MyObject toEntityAttribute(String value) {
return myBean.convert(value); // myBean is NULL
}
}
...
repository.find(myEntityID) // NPE from MyObjectToStringConverter
java.lang.NullPointerException: null
at org.myproject.mvc.converter.MyObjectToStringConverter.toEntityAttribute(MyObjectToStringConverter.java:25)
at org.myproject.mvc.converter.MyObjectToStringConverter.toEntityAttribute(MyObjectToStringConverter.java:12)
at org.neo4j.ogm.entityaccess.FieldWriter.write(FieldWriter.java:64)
at org.neo4j.ogm.mapper.GraphEntityMapper.writeProperty(GraphEntityMapper.java:162)
at org.neo4j.ogm.mapper.GraphEntityMapper.setProperties(GraphEntityMapper.java:127)
at org.neo4j.ogm.mapper.GraphEntityMapper.mapNodes(GraphEntityMapper.java:108)
at org.neo4j.ogm.mapper.GraphEntityMapper.mapEntities(GraphEntityMapper.java:92)
at org.neo4j.ogm.mapper.GraphEntityMapper.map(GraphEntityMapper.java:67)
at org.neo4j.ogm.session.response.SessionResponseHandler.loadById(SessionResponseHandler.java:161)
at org.neo4j.ogm.session.delegates.LoadOneDelegate.load(LoadOneDelegate.java:45)
at org.neo4j.ogm.session.delegates.LoadOneDelegate.load(LoadOneDelegate.java:36)
at org.neo4j.ogm.session.Neo4jSession.load(Neo4jSession.java:99)
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findOne(GraphRepositoryImpl.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:483)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:468)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:440)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
at com.sun.proxy.$Proxy87.findOne(Unknown Source)
at org.myproject.mvc.service.AbstractService.find(AbstractService.java:40)

Answer 1

The OGM will not get the converter from the Spring context- it has no dependencies at all on Spring. Perhaps you can use Springs ConversionService?
http://docs.spring.io/spring-data/neo4j/docs/4.0.0.RELEASE/reference/html/#_spring_s_conversionservice