ClassCastException on getReturnedDomainClass for parametrized types [DATAJPA-45]

[spring-projects-issues]

Andres March opened DATAJPA-45 and commented

ClassCastException on getReturnedDomainClass for parametrized types.

The query:

 @NamedQuery(name = "ContentFlag.getNewFlagCountByReasonForTitleId", query = "select new map ( c.reason as reason, count(*) as numFlags ) "
                + "from ContentFlag c where c.content.title.id = ?1"
                + " and (c.dateFlagSet > c.content.statistics.dateFlagCleared or c.content.statistics.dateFlagCleared is null) "
                + "group by c.reason")

The method:

public abstract java.util.List com.qualcomm.qis.plaza.repo.ContentFlagRepository.getNewFlagCountByReasonForTitleId(java.lang.Long)

The actual return type:

java.util.List<java.util.Map<java.lang.String, java.lang.Object>>

The line where the exception is thrown:

return (Class<?>) ((ParameterizedType) type)
                    .getActualTypeArguments()[0];

The exception:

Caused by: java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to java.lang.Class
	at org.springframework.data.repository.util.ClassUtils.getReturnedDomainClass(ClassUtils.java:63)
	at org.springframework.data.repository.query.QueryMethod.getDomainClass(QueryMethod.java:107)
	at org.springframework.data.jpa.repository.query.JpaQueryMethod.getNamedQueryName(JpaQueryMethod.java:126)
	at org.springframework.data.jpa.repository.query.NamedQuery.lookupFrom(NamedQuery.java:71)
	at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:132)
	at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:73)
	at org.springframework.data.repository.support.RepositoryFactorySupport$QueryExecuterMethodInterceptor.<init>(RepositoryFactorySupport.java:259)
	at org.springframework.data.repository.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:143)
	at org.springframework.data.repository.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:107)
	at org.springframework.data.repository.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:36)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)
	... 36 more

---

Referenced from: commits spring-projects/spring-data-commons@680a74c

[spring-projects-issues]

Oliver Drotbohm commented

Should be fixed with the latest Spring Data Commons release