实体类继承了父类时，若父类中的id为泛型，自定义id生成策略时，会报错

[zuihou]

复现步骤

1. 定义父类实体

public class Entity<T> implements Serializable {

    @Id(keyType = KeyType.Generator, value = "uid")
    protected T id;

}

2. 定义子类实体

@Table(value = "test")
public class Test extends Entity<Long>{
    private String name;
}

3. 全局配置

mybatis-flex:
  global-config:
    key-config:
      before: true
      key-type: generator
      value: 'uid'

4. 注册

KeyGeneratorFactory.register("uid", new UUIDKeyGenerator());

5. 定义 UUIDKeyGenerator

public class UUIDKeyGenerator implements IKeyGenerator {
   
    @Override
    public Object generate(Object entity, String keyColumn) {
        return Long.valueOf(1234L);
    }
}

6. 调用BaseMapper的insert等方法

报错源码位置

public class CustomKeyGenerator implements KeyGenerator {
    @Override
    public void processBefore(Executor executor, MappedStatement ms, Statement stmt, Object parameter) {

               // 这行代码报错，因为setInvoker.getType() 识别为Object
                Object id = ConvertUtil.convert(generateId, setInvoker.getType());
    }
}

报错信息：

org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: com.mybatisflex.core.exception.MybatisFlexException: java.lang.IllegalArgumentException: Can not convert "505214112515502080" to type"java.lang.Object".
### Cause: com.mybatisflex.core.exception.MybatisFlexException: java.lang.IllegalArgumentException: Can not convert "505214112515502080" to type"java.lang.Object".
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:199)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:184)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:425)
	at jdk.proxy2/jdk.proxy2.$Proxy136.insert(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:272)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:62)
	at com.mybatisflex.core.mybatis.binding.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:146)
	at com.mybatisflex.core.mybatis.binding.FlexMapperProxy.invoke(FlexMapperProxy.java:85)
	at jdk.proxy2/jdk.proxy2.$Proxy142.insert(Unknown Source)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:244)
	at jdk.proxy2/jdk.proxy2.$Proxy144.insert(Unknown Source)
	at com.mybatisflex.core.service.IService.save(IService.java:65)
	at top.fsfsfs.boot.modules.system.controller.TestController.save(TestController.java:70)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:547)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:614)
	at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
	at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:91)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at org.springframework.web.servlet.resource.ResourceUrlEncodingFilter.doFilter(ResourceUrlEncodingFilter.java:66)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at com.alibaba.druid.support.jakarta.WebStatFilter.doFilter(WebStatFilter.java:113)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at top.fsfsfs.basic.xss.filter.XssFilter.doFilter(XssFilter.java:66)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at org.springframework.web.filter.ServerHttpObservationFilter.doFilterInternal(ServerHttpObservationFilter.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
	at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)
	at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
	at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
	at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
	at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
	at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:276)
	at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
	at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:132)
	at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
	at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:256)
	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:101)
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:393)
	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:859)
	at org.jboss.threads.ContextHandler$1.runWith(ContextHandler.java:18)
	at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2513)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1512)
	at org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1282)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: com.mybatisflex.core.exception.MybatisFlexException: java.lang.IllegalArgumentException: Can not convert "505214112515502080" to type"java.lang.Object".
	at com.mybatisflex.core.exception.FlexExceptions.wrap(FlexExceptions.java:39)
	at com.mybatisflex.core.keygen.CustomKeyGenerator.processBefore(CustomKeyGenerator.java:88)
	at org.apache.ibatis.executor.statement.BaseStatementHandler.generateKeys(BaseStatementHandler.java:143)
	at org.apache.ibatis.executor.statement.BaseStatementHandler.<init>(BaseStatementHandler.java:64)
	at org.apache.ibatis.executor.statement.PreparedStatementHandler.<init>(PreparedStatementHandler.java:42)
	at com.mybatisflex.core.mybatis.FlexPreparedStatementHandler.<init>(FlexPreparedStatementHandler.java:38)
	at com.mybatisflex.core.mybatis.FlexStatementHandler.<init>(FlexStatementHandler.java:58)
	at com.mybatisflex.core.mybatis.FlexConfiguration.newStatementHandler(FlexConfiguration.java:112)
	at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:48)
	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197)
	... 103 common frames omitted
Caused by: java.lang.IllegalArgumentException: Can not convert "505214112515502080" to type"java.lang.Object".
	at com.mybatisflex.core.util.ConvertUtil.convert(ConvertUtil.java:113)
	at com.mybatisflex.core.util.ConvertUtil.convert(ConvertUtil.java:34)
	at com.mybatisflex.core.keygen.CustomKeyGenerator.processBefore(CustomKeyGenerator.java:84)
	... 112 common frames omitted

[zuihou]

刚又试了一下，就算使用 mf 自带的id 生成器也有同样问题

public class SuperEntity<T> implements Serializable {

    @Id(keyType = KeyType.Generator, value = KeyGenerators.snowFlakeId)
    protected T id;

}

原因出在 CustomKeyGenerator :

Invoker setInvoker = tableInfo.getReflector().getSetInvoker(idInfo.getProperty());
                Object id = ConvertUtil.convert(generateId, setInvoker.getType());