Android Open Source - AndroidOperaLink Element

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License

The source code is released under:

Apache License

Java Source Code

package com.opera.link.apilib.android.items;
//w  w  w  .java2 s . c  om
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map.Entry;

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

public abstract class Element {
  
  private String id = null;
  
  /**
   * @return Returns unique ID of the element at the server, 
   * if the element not added then returns null
   */
  public String getId() {
    return id;
  }
  public void setId(String id) {
    this.id = id;
  }

  protected static String ITEM_TYPE;
  
  protected static final String PROPERTIES_JSON_KEY = "properties";
  public static final String ITEM_TYPE_JSON_KEY = "item_type";
  protected static final String ID_JSON_KEY = "id";
  protected static final String CHILDREN_JSON_KEY = "children";
  
  protected static final String TITLE_JSON_FIELD = "title";
  protected static final String NICKNAME_JSON_FIELD = "nickname";
  protected static final String DESCRIPTION_JSON_FIELD = "description";
  protected static final String URI_JSON_FIELD = "uri";
  protected static final String CREATED_JSON_FIELD = "created";
  protected static final String VISITED_JSON_FIELD = "visited";
  protected static final String ICON_JSON_FIELD = "icon";
  protected static final String THUMBNAIL_JSON_FIELD = "thumbnail";
  protected static final String TARGET_JSON_FIELD = "target";
  protected static final String TYPE_JSON_FIELD = "type";
  protected static final String CONTENT_JSON_FIELD = "content";
  
  
  abstract void loadParameters(JSONObject json) throws JSONException;
  
  public abstract String getDatatype();
  public abstract String getItemType();

  protected static final SimpleDateFormat timezoneDateFormat = 
    new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
  protected static final SimpleDateFormat localDateFormat = 
    new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
  
  protected static <T extends FolderEntry<?>> void createChildren(JSONObject jsonElement, 
      FolderContext<T> folderContent, Class<T> cls) throws JSONException {
    
    if (jsonElement.has(Element.CHILDREN_JSON_KEY)) {
      folderContent.setChildren(
        elementsFactory(jsonElement.getJSONArray(Element.CHILDREN_JSON_KEY), cls)
        );
    } else {
      folderContent.setChildren(null);
    }
  }
    
  
  @SuppressWarnings("unchecked")
  public static <T extends Element> ArrayList<T> elementsFactory(JSONArray jsonList, Class<T> cls) throws JSONException {
    int size = jsonList.length();
    ArrayList<T> elements = new ArrayList<T>(size);
    
    for (int i = 0; i < size; i++) {
      
      JSONObject jsonElement = (JSONObject) jsonList.get(i);
      T element = null;
      
      // create object according to the item_type
      String item_type = jsonElement.getString(Element.ITEM_TYPE_JSON_KEY);
      if (item_type.equals(Bookmark.ITEM_TYPE)) {
        element = (T) new Bookmark();
      }
      if (item_type.equals(BookmarkFolder.ITEM_TYPE)) {
        BookmarkFolder bookmarkFolder = new BookmarkFolder();
        element = (T) bookmarkFolder;
        // read folder content
        createChildren(jsonElement, bookmarkFolder.folder, BookmarkFolderEntry.class);
      }
      if (item_type.equals(BookmarkSeparator.ITEM_TYPE)) {
        element = (T) new BookmarkSeparator();
      }
      if (item_type.equals(Note.ITEM_TYPE)) {
        element = (T) new Note();
      }
      if (item_type.equals(NoteFolder.ITEM_TYPE)) {
        NoteFolder noteFolder = new NoteFolder();
        element = (T) noteFolder;
        // read folder content
        createChildren(jsonElement, noteFolder.folder, NoteFolderEntry.class);
      }
      if (item_type.equals(NoteSeparator.ITEM_TYPE)) {
        element = (T) new NoteSeparator();
      }
      if (item_type.equals(SpeedDial.ITEM_TYPE)) {
        element = (T) new SpeedDial();
      }
      
      // set properties of new created object
      elements.add(element);

      element.updateParameters(jsonElement);
    }
    
    return elements;
  }
  
  public void updateParameters(JSONObject jsonElement) throws JSONException {
    this.id = jsonElement.getString(ID_JSON_KEY); 
    this.loadParameters(jsonElement.getJSONObject(Element.PROPERTIES_JSON_KEY));
  }
  
  public Date parseDate(String dateString) {
    try {
      return timezoneDateFormat.parse(dateString);
    } catch (ParseException e) {
      try { // try parse without a time zone
        return localDateFormat.parse(dateString);
      } catch (ParseException e1) {
        e.printStackTrace();
        return null;
      }
    }
  }
  
  public String dateToString(Date date) {
    if (date != null) {
      return timezoneDateFormat.format(date);
    }
    return null;
  }

  public abstract HashMap<String, String> createParamsDict();

  protected HashMap<String, String> skipNullParams(
      HashMap<String, String> params) {
    HashMap<String, String> filteredParams = new HashMap<String, String>();
    for (Entry<String, String> paramEntry : params.entrySet()) {
      if (paramEntry.getValue() != null) {
        filteredParams.put(paramEntry.getKey(), paramEntry.getValue());
      }
    }
    return filteredParams;
  }
}

Java Source Code List

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