title: json can't serialize type with MONGODB and Hibernate-OGM
body: <p>I am trying to run a very simple  query using Hibernate NamedQuery and MongoDB. However when I am trying to add ENUM field into the WHERE condition it throws an exception below. Without enum in WHERE condition works as expected</p>
  
  <pre><code>java.lang.RuntimeException: json can't serialize type : class com.entity.model.social.SocialProvider
      at com.mongodb.util.ClassMapBasedObjectSerializer.serialize(ClassMapBasedObjectSerializer.java:77)
      at com.mongodb.util.JSONSerializers$MapSerializer.serialize(JSONSerializers.java:317)
      at com.mongodb.util.ClassMapBasedObjectSerializer.serialize(ClassMapBasedObjectSerializer.java:79)
      at com.mongodb.util.JSONSerializers$IterableSerializer.serialize(JSONSerializers.java:290)
      at com.mongodb.util.ClassMapBasedObjectSerializer.serialize(ClassMapBasedObjectSerializer.java:79)
      at com.mongodb.util.JSONSerializers$MapSerializer.serialize(JSONSerializers.java:317)
      at com.mongodb.util.ClassMapBasedObjectSerializer.serialize(ClassMapBasedObjectSerializer.java:79)
      at com.mongodb.util.JSON.serialize(JSON.java:55)
      at com.mongodb.util.JSON.serialize(JSON.java:40)
      at com.mongodb.DBCollectionImpl.find(DBCollectionImpl.java:78)
      at com.mongodb.DBCollectionImpl.find(DBCollectionImpl.java:66)
      at com.mongodb.DBCursor._check(DBCursor.java:458)
      at com.mongodb.DBCursor._hasNext(DBCursor.java:546)
      at com.mongodb.DBCursor.hasNext(DBCursor.java:571)
      at org.hibernate.ogm.datastore.mongodb.MongoDBDialect$MongoDBResultsCursor.hasNext(MongoDBDialect.java:860)
      at org.hibernate.ogm.query.impl.OgmQueryLoader.listOfEntities(OgmQueryLoader.java:88)
      at org.hibernate.ogm.query.impl.OgmQueryLoader.list(OgmQueryLoader.java:76)
      at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496)
      at org.hibernate.ogm.query.impl.OgmQueryTranslator.list(OgmQueryTranslator.java:126)
      at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231)
      at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264)
      at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)
      at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573)
      at org.hibernate.jpa.internal.QueryImpl.getSingleResult(QueryImpl.java:495)
      at com.dao.social.SocialConnectionDao.getConnectionByUserId(SocialConnectionDao.java:37)
      at com.service.social.SocialConnectionServiceImpl.getConnectionByUserId(SocialConnectionServiceImpl.java:39)
      at com.service.social.SocialConnectionServiceImpl$$FastClassBySpringCGLIB$$1d9a6b18.invoke(&lt;generated&gt;)
      at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
      at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
      at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
      at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
      at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
      at com.service.social.SocialConnectionServiceImpl$$EnhancerBySpringCGLIB$$7583977a.getConnectionByUserId(&lt;generated&gt;)
      at test.com.TestSocialConnection.listSocialConnections(TestSocialConnection.java:60)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
      at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
      at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
      at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
      at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:233)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:87)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:176)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
  </code></pre>
  
  <p>ENTITY </p>
  
  <pre><code>@Entity
  @Indexed(index="social_connection")
  @NamedQueries({ 
      @NamedQuery(name = "social.getConnectionUserById", query = "select s from SocialConnection s where s.provider = :provider and s.providerUserId = :providerUserId")
  })
  @Table(name = "social_connection")
  @JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.NONE, getterVisibility = JsonAutoDetect.Visibility.NONE, isGetterVisibility = JsonAutoDetect.Visibility.NONE, setterVisibility = JsonAutoDetect.Visibility.NONE)
  public class SocialConnection extends DateEntity {
  
  
      private static final transient Logger LOG = LoggerFactory.getLogger(SocialConnection.class);
  
      private SocialProvider provider;
  
      private String providerUserId;
  
  
      public SocialConnection() {
      }
  
  
      @Enumerated(EnumType.STRING)
      @NotNull
      public SocialProvider getProvider() {
          return provider;
      }
  
      public void setProvider(SocialProvider provider) {
          this.provider = provider;
      }
  
      @NotNull
      public String getProviderUserId() {
          return providerUserId;
      }
  
      public void setProviderUserId(String providerUserId) {
          this.providerUserId = providerUserId;
      }
  </code></pre>
  
  <p>ENUM</p>
  
  <pre><code>public enum SocialProvider {
  
      TWITTER("Twitter"),
      FACEBOOK("Facebook"),   
      LINKEDIN("LinkedIn");
  
      private String name;
  
      SocialProvider(String name) {
          this.name = name;
      }   
  
      public String getName() {
          return name;
      }
  
  }
  </code></pre>
  
  <p>DAO:</p>
  
  <pre><code>public SocialConnection getConnectionByUserId(SocialProvider provider, String userId) {     
          TypedQuery&lt;SocialConnection&gt; namedQuery = entityManager.createNamedQuery("social.getConnectionUserById", SocialConnection.class);   
          namedQuery.setParameter("provider", provider);
          namedQuery.setParameter("providerUserId", userId);
          namedQuery.setMaxResults(1);
          return namedQuery.getSingleResult();
    }
  </code></pre>