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Nadj
 Post subject: Error: Unable to find a GridType for java.lang.Float
PostPosted: Fri Aug 22, 2014 4:14 am 
Newbie

Joined: Sat Jul 26, 2014 6:15 am
Posts: 4
Hello,
I'm trying to make a Spring + JPA application works on Neo4j (previously working on SQL Server). After resolving all problems of dependencies and connection with Neo4j, I got a problem that I've never thought of, that Hibernate OGM doesn't allow (yet) mapping Float objects (according to docs: http://docs.jboss.org/hibernate/ogm/4.0/reference/en-US/html_single/#ogm-mapping-supported-types-native-mapped). I have one only float attribute in my Class. I got the following error:
Code:
org.hibernate.HibernateException: OGM000059: Unable to find a GridType for java.lang.Float


Full stack:
Code:
Aug 21, 2014 9:25:27 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing log4j from [C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\xct\WEB-INF\log4j\log4j.xml]
Aug 21, 2014 9:25:28 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Aug 21, 2014 9:26:01 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class com.karmicsoft.cawa.core.listeners.CawaContextListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/conf/compat/data.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: domain] Unable to build Hibernate SessionFactory
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1482)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
   at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
   at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
   at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
   at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
   at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1117)
   at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:922)
   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
   at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
   at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
   at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
   at com.karmicsoft.cawa.core.listeners.CawaContextListener.contextInitialized(CawaContextListener.java:28)
   at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4210)
   at org.apache.catalina.core.StandardContext.start(StandardContext.java:4709)
   at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
   at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
   at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)
   at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)
   at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)
   at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
   at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
   at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
   at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
   at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
   at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
   at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
   at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
   at org.apache.catalina.core.StandardService.start(StandardService.java:525)
   at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
   at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
   at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: domain] Unable to build Hibernate SessionFactory
   at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:1225)
   at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.access$600(EntityManagerFactoryBuilderImpl.java:119)
   at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:853)
   at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843)
   at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)
   at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842)
   at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
   at org.hibernate.ogm.jpa.HibernateOgmPersistence.createContainerEntityManagerFactory(HibernateOgmPersistence.java:106)
   at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:288)
   at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:310)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1541)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1479)
   ... 37 more
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.ogm.persister.SingleTableOgmEntityPersister
   at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185)
   at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)
   at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:401)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)
   at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
   ... 46 more
Caused by: org.hibernate.HibernateException: OGM000059: Unable to find a GridType for java.lang.Float
   at org.hibernate.ogm.type.impl.TypeTranslatorImpl.getType(TypeTranslatorImpl.java:115)
   at org.hibernate.ogm.persister.OgmEntityPersister.<init>(OgmEntityPersister.java:202)
   at org.hibernate.ogm.persister.SingleTableOgmEntityPersister.<init>(SingleTableOgmEntityPersister.java:35)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
   at java.lang.reflect.Constructor.newInstance(Unknown Source)
   at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)
   ... 50 more

Aug 21, 2014 9:26:01 AM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
Aug 21, 2014 9:26:01 AM org.apache.catalina.core.ApplicationContext log
INFO: Shutting down log4j


Is that the real problem? Are there some workarounds?
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Gunnar
 Post subject: Re: Error: Unable to find a GridType for java.lang.Float
PostPosted: Fri Aug 22, 2014 1:38 pm 
Hibernate Team
Hibernate Team

Joined: Sat Jan 24, 2009 12:46 pm
Posts: 388
Hi,

The simplest would be to use Double in your entity instead of Float as this type is already supported. If that is not an option and you really need to use a Float, you could do the following (currently we do not yet support plugging in custom grid types):

* Implement a custom FloatType similar to org.hibernate.ogm.type.DoubleType
* Create a custom version of Neo4jDialect and override the overrideType() method, adding your custom FloatType
* Configure your custom dialect via the hibernate.ogm.datastore.grid_dialect property

There is also an open issue for this (https://hibernate.atlassian.net/browse/OGM-401), if you'd like to contribute a patch for this, we'd be more than happy to integrate it!

Hth,

--Gunnar

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Visit my blog at http://musingsofaprogrammingaddict.blogspot.com/

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