java - 如何将 Set<String> 转换为 Set<Object>

Question

如何转换strRoles至Set<Role> 。预先感谢您

Set<String> strRoles = signUpRequest.getRoles();
Set<Role> roles = new HashSet<>();

角色.模型

@Document(collection = "roles")
public class Role {   
    @Id
    private String id;
    private ERole name;
}

Erole.enum

public enum ERole {
    ROLE_ADMIN,
    ROLE_USER
}

Answer 1

使用流:

Set<Role> convertStringSetToRoleSetWithStreams(final Set<String> rolesInString) {
    return rolesInString.stream().map(roleInString -> {
        final Role role = new Role();
        role.setName(ERole.valueOf(roleInString));
        return role;
    }).collect(Collectors.toSet());
}

没有流:

Set<Role> convertStringSetToRoleSetWithoutStreams(final Set<String> rolesInString) {
    final Set<Role> rolesInObject = new HashSet<>();
    for (final String roleInString : rolesInString) {
        final Role role = new Role();
        role.setName(ERole.valueOf(roleInString));
        rolesInObject.add(role);
    }
    return rolesInObject;
}

如果答案有效，请随意接受。