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Cannot Cast Class To Parameterizedtype


And therein lies the problem: Professional.class.getTypeArguments looks at the declaration of the Professional class, discovering a type argument, whereas Assassin.class.getGenericSuperclass looks at the occurrence of Professional in the declaration of Assassin You have to go one step further to get to Generic. In the EntityRepository constructor, you should be using something like the following, with the appropriate checks. Create a separate testing layer and inject your object (or a mock). –Anthony Accioly Jun 17 '12 at 14:03 I will open a separate topic for this. his comment is here

Now I understand this constructor and error :D I wonder can it be rewritten using recursion? –masterdany88 May 15 '15 at 12:46 add a comment| up vote 1 down vote While If you had a method like static Foo makeFoo(E element) { Foo f = new Foo(100) {}; // do something with element } it would fail because ((ParameterizedType)this.getClass().getGenericSuperclass()) .getActualTypeArguments()[0] would Make sure that the service layer implements and interface. Person jbond = new Agent(); System.out.println("Generic superclass type argument: " + tryGetSuperclassGenericTypeParam(jbond)); Person joepublic = new Bystander(); System.out.println("Generic superclass type argument: " + tryGetSuperclassGenericTypeParam(joepublic)); Person oddjob = new Assassin(); System.out.println("Generic superclass

Java.lang.class Cannot Be Cast To Java.lang.reflect.parameterizedtype Spring

In a company crossing multiple timezones, is it rude to send a co-worker a work email in the middle of the night? Not to worry we’ve got you covered. In this case, the issue centres on the interplay between Class.getTypeParameters and ParameterizedType. This solved the issue. –user811602 Apr 15 '14 at 4:52 add a comment| up vote -1 down vote This is a solution public TO getTo() throws Exception { if(to == null)

if (superclass.getTypeParameters().length > 0) { return ((ParameterizedType) clazz.getGenericSuperclass()).getActualTypeArguments()[0]; } else { return null; }}  So...what happens? Word for "using technology inappropriately"? Abstract class GenericDaoImpl(this class has general purpose function like persist, merge) public abstract class GenericDaoImpl implements GenericDao {... However, if we look at Class.getGenericSuperclass2, which we invoke next, we find that it: Returns the Type representing the direct superclass of the entity [...] represented by this Class.

more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed This working fine but when I added one more annotation inside ShlkActiveWorkflowDAOImpl, then I am getting the same exception. –user864077 Jun 17 '12 at 5:59 I have added internal http://stackoverflow.com/questions/24829146/classcastexceptionjava-lang-class-cannot-be-cast-to-java-lang-reflect-parameter java:377) at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:2 85) at org.springframework.aop.framework.Cglib2AopProxy.g etProxy(Cglib2AopProxy.java:201) ... 36 more Caused by: java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType at com.retailstore.dao.GenericDAO.(GenericDAO.j ava:21) at com.retailstore.dao.StoreIPDAO.(StoreIPDAO.j ava:15) at com.retailstore.dao.StoreIPDAO$$EnhancerByCGLIB$$4 d474fc9.() at sun.reflect.NativeConstructorAccessorImpl.newInsta nce0(Native

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{{ editionName }} {{ node.blurb }} {{ ::node.title }} {{ parent.title || parent.header.title}} {{ parent.tldr }} {{ parent.linkDescription }} {{ parent.urlSource.name }} by {{ parent.authors[0].realName || parent.author}} · {{ I can use everything fine, but when I want to apply the transaction annotation it bombs out. If a reviewer makes significant contributions to improving a paper, may he/she suggest becoming a coauthor?


In other words, this is returning class-level information about the declaration of, in our case, the Professional class, which of course does have a type parameter. http://stackoverflow.com/questions/14789226/getting-class-from-generic-not-working Interface ProductTypeDao public interface ProductTypeDao extends GenericDao { Spring repository class ProductTypeDaoImpl @Repository("productTypeDao") public class ProductTypeDaoImpl extends GenericDaoImpl implements ProductTypeDao {.... Java.lang.class Cannot Be Cast To Java.lang.reflect.parameterizedtype Spring Brought to you in partnership withZeroTurnaround. Get Generic Type Java Any clue as to what it means?

Browse other questions tagged java or ask your own question. http://electrictricycle.net/cannot-cast/cannot-cast-class-org-apache-axis2-jaxws-spi-provider-to-class-javax-xml-ws-spi-provider.html getGenericSuperclass()).getActualTypeArguments()[0]).newInst‌ance()); –clankill3r Jul 18 '14 at 15:58 And why are you casting the Type result from getGenericSuperclass to ParamererizedType? –Hot Licks Jul 18 '14 at 16:01 add a comment| Related 6Class cannot be cast to java.lang.reflect.ParameterizedType0Spring, CXF, java.lang.Class cannot be cast to [Ljava.lang.Class;11java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType0Design Pattern: Lazy Singleton, Generics and Inheritance: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType0Request You should do the following instead of relying on reflection to infer its class def..

Without capturing an actual value for T in a type definition, there's no way to recover the value of T at runtime. How can I prove its value? I hope someone can help. weblink Join them; it only takes a minute: Sign up ClassCastException:java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType up vote 1 down vote favorite 1 I'm trying to work with generics mostly for practice

Thanks for subscribing! Structure: public interface GenericDAO @Repository public class AbstractGenericDAO implements GenericDAO { private Class persistentClass; @Autowired private SessionFactory sessionFactory; static Logger The 10'000 year skyscraper Why didn’t Japan attack the West Coast of the United States during World War II?

Let me know if you have questions. –Atticus Oct 12 '12 at 20:01 1 can spring autowire the entityClass this way? –Allan Ruin Feb 26 '14 at 8:15 add a

private Class clazz; public FrontUtil(Class clazz) { this.clazz = clazz; } Then use that Class object wherever you need it. All commenting, posting, registration services have been turned off. IBM Elevate the Customer Experience in the Mobile World CA Technologies The A to Z of OOP Micro Focus Building Microservices in Java? Start by reading why you shouldn't use them.

How to deal with a coworker that writes software to give him job security instead of solving problems? Note that this trick can only work when you instantiate the type parameter with a non-parameterized class literal. I just saw this bird outside my apartment. check over here The actual output, however, is: Exception in thread "main" java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType at tryGetSuperclassGenericTypeParam(...) Huh?

asked 4 years ago viewed 13089 times active 1 year ago Linked 1 Extend class from another extended Parametrized Generic class Related 4Error testing DAOs: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class6Class This is completely unrelated to what you are doing. If you are worried about the @Autowired annotation at AbstractGenericDAO, don't be. IBM “Reactive Microservices Architecture”: A Free O’Reilly Guidebook By Java Champion Jonas Bonér Lightbend Modern Monitoring across Omnichannel, Microservices and Cloud CA Technologies 8 Steps to Rocket-Powered Java Development ZeroTurnaround Delivering

When this code is run, the first two invocations of tryGetSuperclassGenericTypeParam result in the expected: Generic superclass type argument: interface SpyingGeneric superclass type argument: null What about the third one? It's the black magic of java! The type parameter of an object instantiation expression (new GenericObject()) is not present anywhere at runtime. Awesome!

It seems fairly straightforward: see if the object's superclass is generic (i.e. The solution is to parameterize the two types in your class declaration. From your architecture it looks like it only makes sense to inject the more specialized type. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

I have not found anyone else experiencing the same problem. Now i made a second project and as i had problems with reading out the Class i tried to do the most simple case possible: public class GenericObject implements IGenericObject { If the superclass is a parameterized type, the Type object returned must accurately reflect the actual type parameters used in the source code. Here, the information returned is specific to the Anyone know what it is?

Not the answer you're looking for? Player claims their wizard character knows everything (from books). Hot Network Questions Is it possible to bleed brakes without using floor jack? And here comes my second point: Do not use reflection unless you really really have to.

Since AbstractGenericDAO superclass (Object) is not generic, you will not be able to downcast its Type to ParameterizedType, and so this line of code will fail (in the same way that asked 2 years ago viewed 13612 times active 8 months ago Linked 352 What is a raw type and why shouldn't we use it? 2 Why can't you create an instance