Android Open Source - Test-SimpleTwitterClient Parser

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License

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Java Source Code

package com.example.Twitter_Android.Net;
//www .j  a  v a  2 s .  c  o m
import com.example.Twitter_Android.Logic.Person;
import com.example.Twitter_Android.Logic.Tweet;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;

class Parser {
  private final JSONParser parser;
  private final DateFormat incomingDate = new SimpleDateFormat("EE MMM dd HH:mm:ss Z yyyy");
  private final DateFormat formattedDate = new SimpleDateFormat("EE dd MMM HH:mm", new Locale("ru"));


  public Parser() {
    parser = new JSONParser();
    formattedDate.setTimeZone(TimeZone.getTimeZone("GMT+7"));
  }

  //------------------------------------------------------------------------------------------------------------------

  /**
   * ???????? ???????? ?????? ?? ???????.
   * ?????? ?????????????? ?????? JSON ARRAY ?? ??????.
   * 1.   ????????? ??????? ?? ????????? ?????????.
   * 2.   ????????? ?????? ????????.
   * SuppressWarnings("unchecked") - ?.?. jsonArray ????????? ?????? ????????? ???? JSONObject
   * ?, ? ?????? ???????, ?????????? ????? ??????????.
   *
   * @param str ??????? ???? ??????? ?? ?????.
   * @return ???????? ??????.
   * @throws ParseException ????? ??????? ????????????? ??? null.
   */
  @SuppressWarnings("unchecked")
  public List<Tweet> getTweets(String str) throws ParseException {
    Object parsedString = parser.parse(str);
    JSONArray jsonArray = (JSONArray) parsedString;
    List<Tweet> tweets = new ArrayList<>();
    for (JSONObject arrayValue : (Iterable<JSONObject>) jsonArray) {
      Tweet tweet;
      JSONObject retweeted = (JSONObject) arrayValue.get("retweeted_status");    //????????, ???? ???? ??? ???????
      if (retweeted != null) {
        //??? ??????, ????? ?????????? ????????????? ??????.
        tweet = getSingleTweet(retweeted);
        JSONObject user = (JSONObject) arrayValue.get("user");
        Person retweetedBy = getPerson(user);
        tweet.setRetweetedBy(retweetedBy);
        long afterRetweetID = (long) arrayValue.get("id");
        tweet.setIdAfterRetweet(afterRetweetID);
      } else {
        //??? ?? ??????.
        tweet = getSingleTweet(arrayValue);
      }
      tweets.add(tweet);
    }
    return tweets;
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ?????????? ????????? ????.
   *
   * @param object JSONObject ???? ???????.
   * @return ????.
   */
  private Tweet getSingleTweet(JSONObject object) {
    JSONObject user = (JSONObject) object.get("user");
    Person person = getPerson(user);
    String text = (String) object.get("text");
    String createdAt = "Unknown";
    try {
      createdAt = getCreationDate(object);
    } catch (java.text.ParseException e) {
      e.printStackTrace();
    }
    String lang = (String) object.get("lang");
    String[] tags = getTags(object);
    String[] media = getMedia(object);
    long ID = (long) object.get("id");
    return new Tweet(text, createdAt, lang, tags, person, media, ID);
  }
  //------------------------------------------------------------------------------------------------------------------

  public Tweet getSingleTweet(String str) throws ParseException {
    return getSingleTweet((JSONObject) parser.parse(str));
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * Returning next_cursor value in followings timeline.
   *
   * @param str string to parse
   * @return next_cursor value
   * @throws ParseException incorrect or null string
   */
  public long getNextCursor(String str) throws ParseException {
    JSONObject parsedString = (JSONObject) parser.parse(str);
    return (long) parsedString.get("next_cursor");
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ???????? ???????? ??????, ????????????????? ??????????? ????????.
   *
   * @param str JSON ?????? ???? ???????.
   * @return ???????? ??????.
   * @throws ParseException ????? ??????? ????????????? ??? null.
   */
  public List<Tweet> getSearchedTweets(String str) throws ParseException {
    Object parsedString = parser.parse(str);
    JSONObject array = (JSONObject) parsedString;
    JSONArray jsonArray = (JSONArray) array.get("statuses");
    return getTweets(jsonArray.toJSONString());
  }

  public List<Person> getSearchedUsers(String str) throws ParseException {
    Object parsedString = parser.parse(str);
    JSONArray array = (JSONArray) parsedString;
    List<Person> result = new ArrayList<>();
    for (JSONObject arrayValue : (Iterable<JSONObject>) array) {
      Person person = getPerson(arrayValue);
      result.add(person);
    }
    return result;
  }
  //------------------------------------------------------------------------------------------------------------------

  public Person getPerson(String str) throws ParseException {
    Object parsedString = parser.parse(str);
    JSONObject data = (JSONObject) parsedString;
    return getPerson(data);
  }

  private Person getPerson(JSONObject person) {
    String name = (String) person.get("name");
    String profileImage = (String) person.get("profile_image_url_https");
    String location = (String) person.get("location");
    String description = (String) person.get("description");
    String screenName = (String) person.get("screen_name");
    boolean friend = (boolean) person.get("following");
    long ID = (long) person.get("id");
    return new Person(name, screenName, profileImage, location, description, friend, ID);
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ?????????? ???? ?????????? ?????. ?? ??????? ?? ????? ???????????? ????????? ??????, ???????? ????????? ????????? ????????.
   *
   * @param object JSONObject ???? ???????.
   * @return ?????????? ?????????????? ????.
   */
  private String getCreationDate(JSONObject object) throws java.text.ParseException {
    String date = (String) object.get("created_at");
    return formattedDate.format(incomingDate.parse(date));
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ?????????? ???????? ??????.
   *
   * @param object JSONObject ???? ???????.
   * @return ???????? ??????.
   */
  @SuppressWarnings("unchecked")
  private String[] getTags(JSONObject object) {
    JSONObject entities = (JSONObject) object.get("entities");
    JSONArray jsonHashTags = (JSONArray) entities.get("hashtags");
    String[] tags = new String[jsonHashTags.size()];
    int i = 0;
    for (JSONObject s : (Iterable<JSONObject>) jsonHashTags) {
      tags[i++] = (String) s.get("text");
    }
    return tags;
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ?????????? ???????? ???????? (??? ???????) ?? ??????????? ??????????.
   *
   * @param object JSONObject ???? ???????.
   * @return ???????? ???????? (??? ???????)
   */
  @SuppressWarnings("unchecked")
  private String[] getMedia(JSONObject object) {
    JSONObject entities = (JSONObject) object.get("entities");
    JSONArray jsonMedia = (JSONArray) entities.get("media");
    if (jsonMedia != null) {
      String[] media = new String[jsonMedia.size()];
      int i = 0;
      for (JSONObject s : (Iterable<JSONObject>) jsonMedia) {
        media[i++] = (String) s.get("media_url_https");
      }

      return media;
    }
    return null;
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ???????? ?? ??????? ???????????? ???? ????????????? ?????????????.
   *
   * @param str ??????? ?????? ????????
   * @return ???????????? ???? ?????????????.
   * @throws ParseException
   */
  public String getUserScreenName(String str) throws ParseException {
    Object parsedString = parser.parse(str);
    JSONObject object = (JSONObject) parsedString;
    return (String) object.get("screen_name");
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * ???????? ???????? ?????? ??????????????.
   *
   * @param str ??????? ?????? ????????
   * @return ???????? ?????? ?????????????.
   * @throws ParseException
   */
  public List<Person> getFriends(String str) throws ParseException {
    List<Person> friends = new ArrayList<>();
    Object parsedString = parser.parse(str);
    JSONObject object = (JSONObject) parsedString;
    JSONArray jsonArray = (JSONArray) object.get("users");
    for (JSONObject arrayValue : (Iterable<JSONObject>) jsonArray) {
      Person person = getPerson(arrayValue);
      friends.add(person);
    }
    return friends;
  }

  //------------------------------------------------------------------------------------------------------------------
  public boolean isFriends(String str) throws ParseException {
    Object parsedString = parser.parse(str);
    JSONObject jsonString = (JSONObject) parsedString;
    JSONObject relationship = (JSONObject) jsonString.get("relationship");
    JSONObject targetFriend = (JSONObject) relationship.get("target");
    return (boolean) targetFriend.get("followed_by");
  }

  public List<Tweet> getMessages(String str) throws ParseException, java.text.ParseException {
    JSONArray jsonArray = (JSONArray) parser.parse(str);
    List<Tweet> result = new ArrayList<>();
    for (JSONObject arrayValue : (Iterable<JSONObject>) jsonArray) {
      long messageId = (long) arrayValue.get("id");
      String text = (String) arrayValue.get("text");
      String time = getCreationDate(arrayValue);
      Person sender = getPerson((JSONObject) arrayValue.get("sender"));
      Tweet message = new Tweet(text, time, "", null, sender, null, messageId);
      result.add(message);
    }
    return result;
  }
}
Java Source Code List
