TwitterRateLimitStatusAdaptor.java

package net.dev123.mblog.twitter;

import java.text.ParseException;

import net.dev123.commons.util.ParseUtil;
import net.dev123.exception.ExceptionCode;
import net.dev123.exception.LibException;
import net.dev123.mblog.entity.RateLimitStatus;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * SinaRateLimitStatusAdaptor
 *
 * @version
 * @author 马庆升
 * @time 2010-8-30 下午04:36:35
 */
public class TwitterRateLimitStatusAdaptor {

	/** 420 Enhance Your Calm: Returned by the Search and Trends API when you are being rate limited. */
	public static final int ENHANCE_YOUR_CALM_CODE = 420;
	public static final String ENHANCE_YOUR_CALM_ERROR = "You have been rate limited. Enhance your calm.";

	/**
	 * 从JSON字符串创建RateLimitStatus对象
	 *
	 * @param jsonString
	 *            json字符串
	 * @return RateLimitStatus对象
	 * @throws LibException
	 */
	public static RateLimitStatus createRateLimitStatus(String jsonString) throws LibException {
		try {
			return createRateLimitStatus(new JSONObject(jsonString));
		} catch (JSONException e) {
			throw new LibException(ExceptionCode.JSON_PARSE_ERROR, e);
		}
	}

	/**
	 * 从JSON对象创建RateLimitStatus对象，包级别访问控制
	 *
	 * @param json
	 *            JSON对象
	 * @return RateLimitStatus对象
	 * @throws LibException
	 */
	static RateLimitStatus createRateLimitStatus(JSONObject json) throws LibException {
		try {
			RateLimitStatus rateLimitStatus = new RateLimitStatus();
			rateLimitStatus.setHourlyLimit(ParseUtil.getInt("hourly_limit", json));
			rateLimitStatus.setRemainingHits(ParseUtil.getInt("remaining_hits", json));
			rateLimitStatus.setResetTime(ParseUtil.getDate("reset_time", json, "EEE MMM d HH:mm:ss Z yyyy"));
			rateLimitStatus.setResetTimeInSeconds(ParseUtil.getInt("reset_time_in_seconds", json));
			rateLimitStatus.setSecondsUntilReset((int) ((rateLimitStatus.getResetTime().getTime() - System
					.currentTimeMillis()) / 1000));
			return rateLimitStatus;
		} catch (ParseException e) {
			throw new LibException(ExceptionCode.DATE_PARSE_ERROR, e);
		}
	}

}