java - Spring JpaRepository using generic entity -

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i'm trying implement generic dao use x entities quite similar (id, code, description):

@repository public interface genericdao<t> extends jparepository<t, long> {      t findbycode(string code);     t findbyid(long id); }

one of entities this:

@getter @setter @entity @table(name = "test") public class test {...}

i've got service need use dao:

@service public class testserviceimpl implements testservice {      private genericdao<test> testdao;      @autowired     public testserviceimpl(genericdao<test> testdao) {         this.testdao = testdao;     } }

when start application using springboot application doesn't start , error is:

caused by: org.springframework.beans.factory.beancreationexception: error     creating bean name 'genericdao': invocation of init method failed; nested exception java.lang.illegalargumentexception: not managed type: class java.lang.object @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializebean(abstractautowirecapablebeanfactory.java:1574) @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.docreatebean(abstractautowirecapablebeanfactory.java:539) @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.createbean(abstractautowirecapablebeanfactory.java:476) @ org.springframework.beans.factory.support.abstractbeanfactory$1.getobject(abstractbeanfactory.java:303) @ org.springframework.beans.factory.support.defaultsingletonbeanregistry.getsingleton(defaultsingletonbeanregistry.java:230) @ org.springframework.beans.factory.support.abstractbeanfactory.dogetbean(abstractbeanfactory.java:299) @ org.springframework.beans.factory.support.abstractbeanfactory.getbean(abstractbeanfactory.java:194) @ org.springframework.beans.factory.support.defaultlistablebeanfactory.findautowirecandidates(defaultlistablebeanfactory.java:1127) @ org.springframework.beans.factory.support.defaultlistablebeanfactory.doresolvedependency(defaultlistablebeanfactory.java:1044) @ org.springframework.beans.factory.support.defaultlistablebeanfactory.resolvedependency(defaultlistablebeanfactory.java:942) @ org.springframework.beans.factory.support.constructorresolver.resolveautowiredargument(constructorresolver.java:813) @ org.springframework.beans.factory.support.constructorresolver.createargumentarray(constructorresolver.java:741) ... 23 more caused by: java.lang.illegalargumentexception: not managed type: class java.lang.object @ org.hibernate.jpa.internal.metamodel.metamodelimpl.managedtype(metamodelimpl.java:219) @ org.springframework.data.jpa.repository.support.jpametamodelentityinformation.<init>(jpametamodelentityinformation.java:68) @ org.springframework.data.jpa.repository.support.jpaentityinformationsupport.getmetadata(jpaentityinformationsupport.java:67) @ org.springframework.data.jpa.repository.support.jparepositoryfactory.getentityinformation(jparepositoryfactory.java:145) @ org.springframework.data.jpa.repository.support.jparepositoryfactory.gettargetrepository(jparepositoryfactory.java:89) @ org.springframework.data.jpa.repository.support.jparepositoryfactory.gettargetrepository(jparepositoryfactory.java:69) @ org.springframework.data.repository.core.support.repositoryfactorysupport.getrepository(repositoryfactorysupport.java:172) @ org.springframework.data.repository.core.support.repositoryfactorybeansupport.initandreturn(repositoryfactorybeansupport.java:239) @ org.springframework.data.repository.core.support.repositoryfactorybeansupport.afterpropertiesset(repositoryfactorybeansupport.java:225) @ org.springframework.data.jpa.repository.support.jparepositoryfactorybean.afterpropertiesset(jparepositoryfactorybean.java:92) @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.invokeinitmethods(abstractautowirecapablebeanfactory.java:1633) @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializebean(abstractautowirecapablebeanfactory.java:1570) ... 34 more

you can't this. spring trying create repository on start, not on autowiring moment. spring absolutely has no idea, kind of generic param should use. trying instantiate repository object. object not entity, corresponding error.

conclusion: repository must of specific type, not generic.


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