How to solve cast issue java.lang.ClassCastException: $Proxy cannot be cast to NotEmpty which is annotation
I have a REST service project integrated with spring. I am trying to integrate bean validation. I have made a custom annotation:
/** * Denotes a field as being no empty. * * @author pguzun */ @Target() @Retention(RUNTIME) @Constraint(validatedBy = ) public @interface NotEmpty < Error error() default Error.ServerError; String message() default ""; Class[] groups() default <>; Class[] payload() default <>; > /** * Checks that a String is not empty. * * @see StringUtils#isEmpty(java.lang.CharSequence) * @author pguzun */ @Component public class NotEmptyValidatorImpl implements INotEmptyValidator < @Override public void initialize(NotEmpty notEmpty) < // NOTHING TO DO >@Override public boolean isValid(String value, ConstraintValidatorContext context) < return !StringUtils.isEmpty(value); >> /** * Is custom an . Engine for defining factory * methods for 's. * * @author pguzun */ public class NeoSpringConstraintValidatorFactory implements ConstraintValidatorFactory, ApplicationContextAware < private ApplicationContext applicationContext; public NeoSpringConstraintValidatorFactory() < >@Override public > T getInstance(Class key) < MapbeansByNames = applicationContext.getBeansOfType(key); if (beansByNames.isEmpty()) < try < return key.newInstance(); >catch (InstantiationException e) < throw new RuntimeException("Could not instantiate constraint validator class '" + key.getName() + "'", e); >catch (IllegalAccessException e) < throw new RuntimeException("Could not instantiate constraint validator class '" + key.getName() + "'", e); >> if (beansByNames.size() > 1) < throw new RuntimeException("Only one bean of type '" + key.getName() + "' is allowed in the application context"); >return (T) beansByNames.values().iterator().next(); > @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException < Assert.notNull(applicationContext, "applicationContext can not be null"); this.applicationContext = applicationContext; >> /** * The User's value object definition * * @author pguzun */ @XmlRootElement() @XmlAccessorType(XmlAccessType.FIELD) public class UserVO < @XmlElement private long id; @NotEmpty(error = Error.EmailVoid) private String email; SEVERE: Servlet.service() for servlet jersey-serlvet threw exception javax.validation.ValidationException: HV000032: Unable to initialize com.backend.rest.validation.validator.NotEmptyValidatorImpl. at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:450) at org.hibernate.validator.internal.engine.ConstraintTree.createAndInitializeValidator(ConstraintTree.java:352) at org.hibernate.validator.internal.engine.ConstraintTree.getInitializedValidator(ConstraintTree.java:334) at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:155) at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:125) at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:86) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:442) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:387) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:351) at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:303) at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:133) at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:194) at com.backend.rest.UserResourceImpl.validateGuest(UserResourceImpl.java:100) at com.backend.rest.UserResourceImpl.register(UserResourceImpl.java:77) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185) at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288) at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.ClassCastException: $Proxy84 cannot be cast to com.backend.rest.validation.validator.NotEmpty at com.backend.rest.validation.validator.NotEmptyValidatorImpl.initialize(NotEmptyValidatorImpl.java:18) at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:447) . 49 more Jun 4, 2012 1:36:57 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet jersey-serlvet threw exception javax.validation.ValidationException: HV000032: Unable to initialize com.backend.rest.validation.validator.NotEmptyValidatorImpl. at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:450) at org.hibernate.validator.internal.engine.ConstraintTree.createAndInitializeValidator(ConstraintTree.java:352) at org.hibernate.validator.internal.engine.ConstraintTree.getInitializedValidator(ConstraintTree.java:334) at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:155) at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:125) at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:86) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:442) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:387) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:351) at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:303) at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:133) at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:194) at com.backend.rest.UserResourceImpl.validateGuest(UserResourceImpl.java:100) at com.backend.rest.UserResourceImpl.register(UserResourceImpl.java:77) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185) at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288) at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.ClassCastException: $Proxy84 cannot be cast to com.backend.rest.validation.validator.NotEmpty at com.backend.rest.validation.validator.NotEmptyValidatorImpl.initialize(NotEmptyValidatorImpl.java:18) at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:447) . 49 more and I know java.lang.ClassCastException: $Proxy84 cannot be cast to Clazz is a clasic spring exception when you don't use interfaces but here I do use and NotEmpty si an annotation Please tell what do I do wrong? ps. I use this versions of frameworks
3.1.1.RELEASE 4.1.3.Final 1.12 1.0.0.GA 4.3.0.Final