JPA关于枚举类型的处理

@Enumerated(EnumType.STRING)
@Column(name="status")
private Status status;

public static enum Status{
    PREPARE("PREP"),INPROGRESS("INPR"),FINISH("FNSH");

    private String code;
    private Status(String code){
        this.code=code;
    }
    @Override
    public String toString(){
        return code;
    }   
    public static Status parseCode(String code){
        for(Status s:Status.values()){
            if(s.code.equalsIgnoreCase(code))return s;
        }
        return null;
    }
}

@Query("from Period where status != 'FINISH' order by beginDate desc")