Spring Data Gemfire store java.lang.Class field

Question

In my code I have a generic "Value" POJO, which contains value itself and it's class:

public class Value<T extends Serializable> implements Serializable {
    private T value;
    private Class<T> type;

    ...

}

I am using Spring Data GemFire and "repositories" feature of Spring Data (the DAOs are created automatically from interfaces). When Spring creates DAO for this bean I got:

FactoryBean threw exception on object creation; nested exception is java.lang.SecurityException: Can not make a java.lang.Class constructor accessible:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'conditionProcessor': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'globalStatusElementDAO': FactoryBean threw exception on object creation; nested exception is java.lang.SecurityException: Can not make a java.lang.Class constructor accessible
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:307) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) ~[spring-web-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) ~[spring-web-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973) [tomcat-embed-core-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467) [tomcat-embed-core-7.0.52.jar:7.0.52]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) [tomcat-embed-core-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) [tomcat-embed-core-7.0.52.jar:7.0.52]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_51]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_51]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_51]
    at java.lang.Thread.run(Thread.java:744) [na:1.7.0_51]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'globalStatusElementDAO': FactoryBean threw exception on object creation; nested exception is java.lang.SecurityException: Can not make a java.lang.Class constructor accessible
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:151) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1514) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:445) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:419) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:544) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:155) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:304) ~[spring-context-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    ... 22 common frames omitted
Caused by: java.lang.SecurityException: Can not make a java.lang.Class constructor accessible
    at java.lang.reflect.AccessibleObject.setAccessible0(AccessibleObject.java:139) ~[na:1.7.0_51]
    at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:129) ~[na:1.7.0_51]
    at org.springframework.util.ReflectionUtils.makeAccessible(ReflectionUtils.java:444) ~[spring-core-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.data.mapping.PreferredConstructor.<init>(PreferredConstructor.java:57) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.model.PreferredConstructorDiscoverer.buildPreferredConstructor(PreferredConstructorDiscoverer.java:106) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.model.PreferredConstructorDiscoverer.<init>(PreferredConstructorDiscoverer.java:74) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.model.BasicPersistentEntity.<init>(BasicPersistentEntity.java:79) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.model.BasicPersistentEntity.<init>(BasicPersistentEntity.java:62) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.gemfire.mapping.GemfirePersistentEntity.<init>(GemfirePersistentEntity.java:40) ~[spring-data-gemfire-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.data.gemfire.mapping.GemfireMappingContext.createPersistentEntity(GemfireMappingContext.java:38) ~[spring-data-gemfire-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.data.gemfire.mapping.GemfireMappingContext.createPersistentEntity(GemfireMappingContext.java:29) ~[spring-data-gemfire-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:246) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:398) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:579) ~[spring-core-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:260) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:171) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:140) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:66) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.gemfire.repository.support.GemfireRepositoryFactory.getEntityInformation(GemfireRepositoryFactory.java:81) ~[spring-data-gemfire-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.data.gemfire.repository.support.GemfireRepositoryFactory.getTargetRepository(GemfireRepositoryFactory.java:97) ~[spring-data-gemfire-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:136) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:153) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:43) ~[spring-data-commons-1.5.3.RELEASE.jar:na]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:144) ~[spring-beans-4.0.2.RELEASE.jar:4.0.2.RELEASE]
    ... 32 common frames omitted

How can I store java.lang.Class in GemFire with Spring Data?

UPD:

public interface GlobalStatusElementDAO
  extends CrudRepository<GlobalStatusElement, String>
{
}

@Region("xxx")
public class GlobalStatusElement<T extends Serializable>
  extends Value<T>
{
  public GlobalStatusElement( final Class<T> type )
  {
    super( type );
  }
}

Answer 1

Class objects are generally not amenable to serialising via reflection. It is significantly easier to simply store the full class name and instantiate the class object from the name when you need it.

You could achieve this by either changing your Value class to store the class name as a String instead of the class object, or by changing how Value gets serialised.

For the second option, this can be done either by making Value implement DataSerializable, or by registering a DataSerializer for Value