Java tutorial
/** * UserEntry * Copyright 22.02.2015 by Michael Peter Christen, @0rb1t3r * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program in the file lgpl21.txt * If not, see <http://www.gnu.org/licenses/>. */ package org.loklak.objects; import org.eclipse.jetty.util.log.Log; import org.elasticsearch.common.Base64; import org.json.JSONException; import org.json.JSONObject; import java.io.IOException; import java.util.Date; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.Map; import com.fasterxml.jackson.core.JsonGenerator; public class UserEntry extends AbstractObjectEntry implements ObjectEntry { public final static String field_screen_name = "screen_name"; // used as id of the record public final static String field_user_id = "user_id"; // to reference the id of the providing service (here: twitter) public final static String field_name = "name"; public final static String field_profile_image_url_http = "profile_image_url_http"; public final static String field_profile_image_url_https = "profile_image_url_https"; public final static String field_profile_image = "profile_image"; public final static String field_appearance_first = "appearance_first"; public final static String field_appearance_latest = "appearance_latest"; private final Map<String, Object> map; public UserEntry(String user_id, String screen_name_raw, String profile_image_url, String name_raw) { this.map = new LinkedHashMap<>(); this.map.put(field_user_id, user_id); this.map.put(field_screen_name, screen_name_raw.replaceAll("</?s>", "").replaceAll("</?b>", "").replaceAll("@", "")); this.map.put(field_name, name_raw); this.map.put(profile_image_url.startsWith("https:") ? field_profile_image_url_https : field_profile_image_url_http, profile_image_url); long now = System.currentTimeMillis(); this.map.put(field_appearance_first, new Date(now)); this.map.put(field_appearance_latest, new Date(now)); } public UserEntry(final JSONObject json) { this.map = new LinkedHashMap<String, Object>(); Iterator<String> ki = json.keys(); while (ki.hasNext()) { String key = ki.next(); try { Object val = json.get(key); this.map.put(key, val); } catch (JSONException e) { } } Date now = new Date(); map.put(field_appearance_first, parseDate(map.get(field_appearance_first), now)); map.put(field_appearance_latest, parseDate(map.get(field_appearance_latest), now)); } public SourceType getType() { try { return SourceType.byName(parseString((String) this.map.get("$type"))); } catch (RuntimeException e) { Log.getLog().warn(e); return null; } } public Number getUser() { String id = getUserId(); try { return id == null ? null : Long.parseLong(id); } catch (NumberFormatException e) { return null; } } public String getUserId() { return parseString((String) this.map.get(field_user_id)); } public String getScreenName() { return parseString((String) this.map.get(field_screen_name)); } public String getName() { return MessageEntry.html2utf8(parseString((String) this.map.get(field_name))); // html2utf8 should not be necessary here since it is already applied in the scraper; however there are old data lines which had not been converted } public String getProfileImageUrl() { Object url = this.map.get(field_profile_image_url_https); if (url != null) return (String) url; return parseString((String) this.map.get(field_profile_image_url_http)); } public boolean containsProfileImage() { Object image = this.map.get(field_profile_image); return image != null && ((String) image).length() > 0; } public byte[] getProfileImage() { Object image = this.map.get(field_profile_image); if (image == null) return null; try { return Base64.decode((String) image); } catch (IOException e) { return null; } } public void setProfileImageUrl(String url) { this.map.put(url.startsWith("https:") ? field_profile_image_url_https : field_profile_image_url_http, url); } public void setProfileImage(byte[] image) { this.map.put(field_profile_image, Base64.encodeBytes(image)); } public Date getAppearanceFirst() { return parseDate(this.map.get(field_appearance_first)); } public Date getAppearanceLatest() { return parseDate(this.map.get(field_appearance_latest)); } public void toJSON(JsonGenerator json) { try { json.writeStartObject(); // object name for this should be 'user' json.writeObjectField(field_screen_name, getScreenName()); json.writeObjectField(field_user_id, getUserId()); json.writeObjectField(field_name, getName()); if (this.map.containsKey(field_profile_image_url_http)) json.writeObjectField(field_profile_image_url_http, this.map.get(field_profile_image_url_http)); if (this.map.containsKey(field_profile_image_url_https)) json.writeObjectField(field_profile_image_url_https, this.map.get(field_profile_image_url_https)); writeDate(json, field_appearance_first, getAppearanceFirst().getTime()); writeDate(json, field_appearance_latest, getAppearanceLatest().getTime()); if (this.map.containsKey(field_profile_image)) json.writeObjectField(field_profile_image, this.map.get(field_profile_image)); json.writeEndObject(); } catch (IOException e) { } } public JSONObject toJSON() throws JSONException { JSONObject json = new JSONObject(); json.put(field_screen_name, getScreenName()); json.put(field_user_id, getUserId()); json.put(field_name, getName()); if (this.map.containsKey(field_profile_image_url_http)) json.put(field_profile_image_url_http, this.map.get(field_profile_image_url_http)); if (this.map.containsKey(field_profile_image_url_https)) json.put(field_profile_image_url_https, this.map.get(field_profile_image_url_https)); json.put(field_appearance_first, utcFormatter.print(getAppearanceFirst().getTime())); json.put(field_appearance_latest, utcFormatter.print(getAppearanceLatest().getTime())); if (this.map.containsKey(field_profile_image)) json.put(field_profile_image, this.map.get(field_profile_image)); return json; } @Override public boolean equals(Object o) { if (!(o instanceof UserEntry)) return false; UserEntry u = (UserEntry) o; return this.map.equals(u.map); } public static void main(String args[]) { System.out.println(new UserEntry("", "test", "http://test.com", "Mr. Test").toString()); //String j = "{\"name\":\"Mr. Test\",\"screen_name\":\"test\",\"profile_image_url\":\"http://test.com\"}"; } }