Spring boot LDAP 在 ODM 中获取成员

Question

我目前正在使用 Spring boot LDAP 构建一个应用程序，但在访问 'memberOf' 属性以确定用户属于哪个组时遇到了一些问题。

我已经看到了Spring LDAP和MemberOf，但是我正在使用ODM从LDAP获取用户，在尝试添加"memberOf"属性时，出现以下错误：

org.springframework.ldap.odm.core.impl.MetaDataException: Can't determine destination type for field private java.util.ArrayList nl.quintor.afstudeermanagementtool.entitiy.LdapUser.memberOf in class class nl.quintor.afstudeermanagementtool.entitiy.LdapUser
at org.springframework.ldap.odm.core.impl.AttributeMetaData.determineFieldType(AttributeMetaData.java:167) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.odm.core.impl.AttributeMetaData.<init>(AttributeMetaData.java:234) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.odm.core.impl.ObjectMetaData.<init>(ObjectMetaData.java:132) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.addManagedClass(DefaultObjectDirectoryMapper.java:151) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.getEntityData(DefaultObjectDirectoryMapper.java:108) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.filterFor(DefaultObjectDirectoryMapper.java:468) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.core.LdapTemplate.find(LdapTemplate.java:1824) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.core.LdapTemplate.findAll(LdapTemplate.java:1806) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.ldap.core.LdapTemplate.findAll(LdapTemplate.java:1814) ~[spring-ldap-core-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.ldap.repository.support.SimpleLdapRepository.findAll(SimpleLdapRepository.java:183) ~[spring-data-ldap-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.data.repository.core.support.ImplementationInvocationMetadata.invoke(ImplementationInvocationMetadata.java:72) ~[spring-data-commons-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:382) ~[spring-data-commons-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:205) ~[spring-data-commons-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:550) ~[spring-data-commons-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:155) ~[spring-data-commons-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:130) ~[spring-data-commons-2.3.9.RELEASE.jar:2.3.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at com.sun.proxy.$Proxy82.findAll(Unknown Source) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at com.sun.proxy.$Proxy82.findAll(Unknown Source) ~[na:na]
at nl.quintor.afstudeermanagementtool.seeders.DatabaseSeeder.seedUserTable(DatabaseSeeder.java:59) ~[classes/:na]
at nl.quintor.afstudeermanagementtool.seeders.DatabaseSeeder.seed(DatabaseSeeder.java:39) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:305) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.event.ApplicationListenerMethodAdapter.processEvent(ApplicationListenerMethodAdapter.java:190) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.event.ApplicationListenerMethodAdapter.onApplicationEvent(ApplicationListenerMethodAdapter.java:153) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:404) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:361) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:898) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:554) ~[spring-context-5.2.14.RELEASE.jar:5.2.14.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:755) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:402) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1247) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1236) ~[spring-boot-2.3.10.RELEASE.jar:2.3.10.RELEASE]
at nl.quintor.afstudeermanagementtool.AfstudeermanagementtoolApplication.main(AfstudeermanagementtoolApplication.java:16) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.3.10.RELEASE.jar:2.3.10.RELEASE]
2021-05-18 16:14:16.109  INFO 14468 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2021-05-18 16:14:16.112  INFO 14468 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2021-05-18 16:14:16.139  INFO 14468 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
Process finished with exit code 0

我使用的代码是：

@Entry(
objectClasses = { "user, Person", "top", "organizationalPerson" })
public class LdapUser {
private @Id Name id;
private @Attribute(name = "cn") String fullName;
private @Attribute(name = "sAMAccountName") String username;
private @Attribute(name ="memberof", readonly = true)
ArrayList<?> memberOf;
public LdapUser() { }
public LdapUser(String fullName, String username, ArrayList<?> memberOf) {
this.fullName = fullName;
this.username = username;
this.memberOf = memberOf;
}
public String getFullName() {
return fullName;
}
public void setFullName(String fullName) {
this.fullName = fullName;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public ArrayList<?> getMemberOf() {
return memberOf;
}
public void setMemberOf(ArrayList<?> memberOf) {
this.memberOf = memberOf;
}
}

Answer 1

这似乎是Java中基于反射的对象映射框架常见的"缺点"。

仅当注释字段是具体类型时，使用@Attribute注释 Java 类字段才有效：这就是为什么注释适用于ArrayList<String>而不是List<String>或ArrayList<?>，因为在后两种情况下，对象映射器在填充该字段时必须"猜测"使用哪种具体类型。换句话说，对象映射器不能调用new List<String>()，所以它会抛出异常。

您可以阅读有关影响JPA ORM标准的类似问题的信息。JPA 似乎通过提供targetEntity属性元素来解决此问题，但这仅存在于他们的某些注释(如@ManyToMany)中，而不是在@Column上，这大致相当于这里的@Attribute。