java.util.TreeSet 自定义包装枚举类型不支持集合类型
java.util.TreeSet collection type not supported for custom wrapped enum type
我正在尝试将枚举类型持久保存到数据库中。初始化 SessionFactory 对象时出现此错误:
Initial SessionFactory creation failed.org.hibernate.AnnotationException: java.util.TreeSet collection type not supported for property: org.structure.business.Accountant.permissions
我的枚举类型包装器:
@Entity(name = "PERMISSION")
public class PermissionWrapper implements Serializable {
private static final long serialVersionUID = 9086935561465328054L;
@Id
@Enumerated(EnumType.STRING)
private Permission permission;
@Override
public boolean equals(Object obj) {
if (!(obj instanceof PermissionWrapper)) {
return false;
}
PermissionWrapper permission2 = (PermissionWrapper) obj;
return permission == permission2.getPermission();
}
...
}
使用包装器的实体:
@Entity(name = "ACCOUNTANT")
public class Accountant extends NormalUser {
private String companyName;
@OneToMany
private TreeSet<PermissionWrapper> permissions;
...
}
用于存储唯一包装枚举的处理程序:
public class Permissions {
private static TreeSet<PermissionWrapper> permissions;
static {
System.out.println("Initialization of permissions...");
setPermissions(initPermissionsTreeSet());
}
private static TreeSet<PermissionWrapper> initPermissionsTreeSet() {
TreeSet<PermissionWrapper> permissions = new TreeSet<>();
permissions.add(new PermissionWrapper(Permission.READ));
permissions.add(new PermissionWrapper(Permission.EDIT));
permissions.add(new PermissionWrapper(Permission.CREATE));
permissions.add(new PermissionWrapper(Permission.DELETE));
return permissions;
}
...
}
使用
@OneToMany
private Set<PermissionWrapper> permissions;
事实上 hibernate 使用它自己的集合实现。
我正在尝试将枚举类型持久保存到数据库中。初始化 SessionFactory 对象时出现此错误:
Initial SessionFactory creation failed.org.hibernate.AnnotationException: java.util.TreeSet collection type not supported for property: org.structure.business.Accountant.permissions
我的枚举类型包装器:
@Entity(name = "PERMISSION")
public class PermissionWrapper implements Serializable {
private static final long serialVersionUID = 9086935561465328054L;
@Id
@Enumerated(EnumType.STRING)
private Permission permission;
@Override
public boolean equals(Object obj) {
if (!(obj instanceof PermissionWrapper)) {
return false;
}
PermissionWrapper permission2 = (PermissionWrapper) obj;
return permission == permission2.getPermission();
}
...
}
使用包装器的实体:
@Entity(name = "ACCOUNTANT")
public class Accountant extends NormalUser {
private String companyName;
@OneToMany
private TreeSet<PermissionWrapper> permissions;
...
}
用于存储唯一包装枚举的处理程序:
public class Permissions {
private static TreeSet<PermissionWrapper> permissions;
static {
System.out.println("Initialization of permissions...");
setPermissions(initPermissionsTreeSet());
}
private static TreeSet<PermissionWrapper> initPermissionsTreeSet() {
TreeSet<PermissionWrapper> permissions = new TreeSet<>();
permissions.add(new PermissionWrapper(Permission.READ));
permissions.add(new PermissionWrapper(Permission.EDIT));
permissions.add(new PermissionWrapper(Permission.CREATE));
permissions.add(new PermissionWrapper(Permission.DELETE));
return permissions;
}
...
}
使用
@OneToMany
private Set<PermissionWrapper> permissions;
事实上 hibernate 使用它自己的集合实现。