ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType #146

gedhi · 2015-09-23T14:08:25Z

It happens when you have an object-field that is specialized with generics.
For example:

@ApiObject(group="foo")
public class FooPojo {
@ApiObjectField
private K fooField;
...
}

Same problem with collections and maps.

ASAP will release the HotFix.

Regards

smcgregor83 · 2015-10-02T20:55:03Z

This defect appears to have regressed as of version 1.2.8. This can be worked around by rolling back to version 1.2.7.

fabiomaffioletti · 2015-10-02T21:08:13Z

Thank you. Would you be able to provide the object that generates the
exception?
Il 02/ott/2015 22:55, "smcgregor83" notifications@github.com ha scritto:

This defect appears to have regressed as of version 1.2.8. This can be
worked around by rolling back to version 1.2.7.

—
Reply to this email directly or view it on GitHub
#146 (comment)
.

smcgregor83 · 2015-10-02T21:13:12Z

Yes certainly. It is the org.springframework.hateoas.Resources class that is causing problems.

fabiomaffioletti · 2015-10-03T20:08:00Z

Hopefully with the fix I just released this will be solved... version 1.2.9 will be synched in a few hours on maven central.

smcgregor83 · 2015-10-04T09:58:57Z

Yep that seems to have done the trick. Nice turnaround!

vk77 · 2015-11-04T08:04:31Z

I'm getting same exception on both 1.2.9 and 1.2.7 versions.
That's the controllers configuration:

@RestController
@RequestMapping("/some/path")
public class MyController
    extends AbstractMyController<MyType> {

}

public abstract class AbstractMyController<ET extends AbstractMyType> {
...
}

public class MyType extends AbstractMyType{
...
}

There is a stacktrace:

java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType
    at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.buildJSONDocObjectsCandidates(AbstractSpringJSONDocScanner.java:127)
    at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.buildJSONDocObjectsCandidates(AbstractSpringJSONDocScanner.java:104)
    at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.buildJSONDocObjectsCandidates(AbstractSpringJSONDocScanner.java:127)
    at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.jsondocObjects(AbstractSpringJSONDocScanner.java:145)
    at org.jsondoc.core.scanner.AbstractJSONDocScanner.getJSONDoc(AbstractJSONDocScanner.java:96)
    at org.jsondoc.springmvc.controller.JSONDocController.getApi(JSONDocController.java:70)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
...

Should the issue be re-opened?

Thanks.

piccarsa · 2015-11-04T10:01:52Z

This commit should fix the problem that happens when one of the "candidate" objects is an istance of TypeVariable.

#166

You face this problem also when the return object of a method annotated with @RequestMapping is an instance of java.lang.reflect.TypeVariable . I leave here an example:

@ApiMethod(path = { "/rest/foocontroller/foos" }, description = "Your REST foo service")
@RequestMapping(value = "/foos", method = RequestMethod.GET)
@ApiResponseObject
@ResponseBody
public MyResponseBodyWrapper<FooBean> getFoos(){
   // service code here
}

Conforming to the java.lang.reflect.TypeVariable api documentation:

TypeVariable is the common superinterface for type variables of kinds.

while for java.lang.reflect.WildcardType is written:

WildcardType represents a wildcard type expression, such as ?, ? extends Number, or ? super Integer.

seredkin · 2015-11-13T03:27:13Z

versions 12.7..9
java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType
at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.buildJSONDocObjectsCandidates(AbstractSpringJSONDocScanner.java:104)

The class signature is

public class RepairOrderPlanController extends GenericController< RepairOrderPlan, RepairOrderPlanRepository >

dcerecedo · 2015-11-19T15:49:54Z

Similar issue here with JSONDoc 1.2.9. I have also tried 1.2.7 with same result.

We use a hierarchy of abstract controllers to centralize all common controller stuff. For example, at the bottom of the Hierarchy we have an abstract controller with all the logic for creating resources through POST:

public abstract class AbstractController<T extends Updatable<ID>, R extends ResourceSupport, ID extends Serializable> extends ReadAndUpdateAbstractController<T, R, ID> {

@RequestMapping(method = RequestMethod.POST)
public ResponseEntity<R> create(@Valid @RequestBody R inputResource) throws Exception {
    T entity= getAssembler().convert(inputResource);
    T updated= getService().create(entity);
    R outputResource= getAssembler().toResource(updated);
    return new ResponseEntity<>(outputResource, HttpStatus.CREATED);
}
}

When invoking the /jsondoc endpoint, JSON Doc tries to analyze this class and I get:

java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType
at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.buildJSONDocObjectsCandidates(AbstractSpringJSONDocScanner.java:127)
....

maximelebastard · 2015-11-22T21:47:14Z

I've got the same issue. My controllers are using this method: https://gist.github.com/wvuong/5673644

I just added this to my pom.xml (in 1.2.6, 1.2.7, 1.2.8 and 1.2.9)

       <!-- JSON Doc -->
        <dependency>
            <groupId>org.jsondoc</groupId>
            <artifactId>spring-boot-starter-jsondoc</artifactId>
            <version>1.2.8</version>
        </dependency>

And I annotated my app with @EnableJsonDoc.

I added this packages to scan in my application.properties:

# JSON Doc
jsondoc.version=1.0
jsondoc.basePath=http://localhost:8080
jsondoc.packages[0]=com.bin.webservice.controller
jsondoc.packages[1]=com.bin.webservice.entity
jsondoc.playgroundEnabled=true
jsondoc.displayMethodAs=URI

I did not annotated any Controller or Model yet. The applications starts correctly, but when I access to http://localhost:8080/jsondoc, I get this stack trace:

2015-11-22 22:46:33.502 ERROR 8199 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType] with root cause

java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType
    at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.buildJSONDocObjectsCandidates(AbstractSpringJSONDocScanner.java:104)
    at org.jsondoc.springmvc.scanner.AbstractSpringJSONDocScanner.jsondocObjects(AbstractSpringJSONDocScanner.java:145)
    at org.jsondoc.core.scanner.AbstractJSONDocScanner.getJSONDoc(AbstractJSONDocScanner.java:96)
    at org.jsondoc.springmvc.controller.JSONDocController.getApi(JSONDocController.java:70)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:775)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

PS: I do not have the error in 1.1.16

fixed regression on issue #146

fabiomaffioletti · 2015-11-29T18:04:45Z

I just merged a PR from @gedhi that should fix the problem. Please let me know if you are still having issues and in that case provide me with details and if possible a failing unit test. Thank you everyone :)

bpsilva · 2016-04-15T22:11:26Z

I'm having the same problem using version 1.2.13. My question is: shouldn't the problem have ended since I'm using @ApiObject(show=false)?

mfnunes · 2016-08-23T21:30:35Z

I'm having the same problem too. Using version: 1.2.16.
My controller is:
public abstract class QuestionGenericCRUDController <T extends Question, T1 extends QuestionDto>

and the error when I try to get jsondoc is:
java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType

fabiomaffioletti added the bug label Sep 24, 2015

fabiomaffioletti added this to the 1.2.5 milestone Sep 24, 2015

fabiomaffioletti closed this as completed Sep 24, 2015

fabiomaffioletti added a commit that referenced this issue Oct 3, 2015

fixes regression on issue #146 (maybe)

2d03b06

piccarsa pushed a commit to gedhi/jsondoc that referenced this issue Nov 3, 2015

fixed regression on issue fabiomaffioletti#146

e7a3939

fabiomaffioletti added a commit that referenced this issue Nov 29, 2015

Merge pull request #166 from gedhi/PR/#146

866fdd6

fixed regression on issue #146

nileshagrawal02 mentioned this issue Dec 18, 2015

TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType (Related to Issue # 146} #174

Closed

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ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType #146

ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType #146

gedhi commented Sep 23, 2015

smcgregor83 commented Oct 2, 2015

fabiomaffioletti commented Oct 2, 2015

smcgregor83 commented Oct 2, 2015

fabiomaffioletti commented Oct 3, 2015

smcgregor83 commented Oct 4, 2015

vk77 commented Nov 4, 2015

piccarsa commented Nov 4, 2015

seredkin commented Nov 13, 2015

dcerecedo commented Nov 19, 2015

maximelebastard commented Nov 22, 2015

fabiomaffioletti commented Nov 29, 2015

bpsilva commented Apr 15, 2016

mfnunes commented Aug 23, 2016 •

edited

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ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType #146

ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.reflect.ParameterizedType #146

Comments

gedhi commented Sep 23, 2015

smcgregor83 commented Oct 2, 2015

fabiomaffioletti commented Oct 2, 2015

smcgregor83 commented Oct 2, 2015

fabiomaffioletti commented Oct 3, 2015

smcgregor83 commented Oct 4, 2015

vk77 commented Nov 4, 2015

piccarsa commented Nov 4, 2015

seredkin commented Nov 13, 2015

dcerecedo commented Nov 19, 2015

maximelebastard commented Nov 22, 2015

fabiomaffioletti commented Nov 29, 2015

bpsilva commented Apr 15, 2016

mfnunes commented Aug 23, 2016 • edited Loading

mfnunes commented Aug 23, 2016 •

edited

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