import org.codehaus.jackson.annotate.JsonIgnore;

import org.codehaus.jackson.map.annotate.JsonSerialize;

import java.io.Serializable;

@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)

//保证序列化json的时候，如果是null的对象，key也会消失

public class ServiceResponse<T> implements Serializable {

    private int status;  //结果状态值

    private String msg;  //结果信息

    private T data;      //结果数据

    private ServiceResponse(int status){

        this.status = status;

    }

    private ServiceResponse(int status, T data){

        this.status = status;

        this.data = data;

    }

    private ServiceResponse(int status, String msg, T data){

        this.status = status;

        this.msg = msg;

        this.data = data;

    }

    private ServiceResponse(int status, String msg){

        this.status = status;

        this.msg = msg;

    }

    @JsonIgnore //让其不在json序列化中

    public boolean isSuccess(){

        return this.status == ResponseCode.SUCCESS.getCode();

    }

    public int getStatus() {

        return status;

    }

    public String getMsg() {

        return msg;

    }

    public T getData() {

        return data;

    }

    public static <T> ServiceResponse<T> createBySuccess(){

        return new ServiceResponse<T>(ResponseCode.SUCCESS.getCode());

    }

    public static <T> ServiceResponse<T> createBySuccessMessage(String msg){

        return new ServiceResponse<T>(ResponseCode.SUCCESS.getCode(), msg);

    }

    public static <T> ServiceResponse<T> createBySuccess(T data){

        return new ServiceResponse<T>(ResponseCode.SUCCESS.getCode(), data);

    }

    public static <T> ServiceResponse<T> createBySuccess(String msg, T data){

        return new ServiceResponse<T>(ResponseCode.SUCCESS.getCode(), msg, data);

    }

    public static <T> ServiceResponse<T> createByError(){

        return new ServiceResponse<T>(ResponseCode.ERROR.getCode(), ResponseCode.ERROR.getDesc());

    }

    public static <T> ServiceResponse<T> createByErrorMessage(String errorMessage){

        return new ServiceResponse<T>(ResponseCode.ERROR.getCode(), errorMessage);

    }

    public static <T> ServiceResponse<T> createByErrorCodeMessage(int errorCode, String errorMessage){

        return new ServiceResponse<T>(errorCode, errorMessage);

    }

}

/**

 * 状态枚举值

 */

public enum ResponseCode {

    SUCCESS(0,"SUCCESS"),

    ERROR(1,"ERROR"),

    NEED_LOGIN(10,"NEED_LOGIN"),

    ILLEGAL_ARGUMENT(2,"ILLEGAL_ARGUMENT");

    private final int code;

    private final String desc;

    ResponseCode(int code, String desc){

        this.code = code;

        this.desc = desc;

    }

    public int getCode() {

        return code;

    }

    public String getDesc() {

        return desc;

    }

}