de.damdi.fitness.db.parser.SportsEquipmentJSONParser.java Source code

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Here is the source code for de.damdi.fitness.db.parser.SportsEquipmentJSONParser.java

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/**
 * 
 * This is OpenTraining, an Android application for planning your your fitness training.
 * Copyright (C) 2012-2013 Christian Skubich
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package de.damdi.fitness.db.parser;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

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

import android.util.Log;

import de.damdi.fitness.basic.SportsEquipment;

public class SportsEquipmentJSONParser extends AbstractJSONParser<List<SportsEquipment>> {
    /** Tag for logging */
    public static final String TAG = "SportsEquipmentJSONParser<>";

    // JSON Node names
    private static final String TAG_NAME = "name";
    private static final String TAG_ALTERNATIVE_NAMES = "alternative_names";

    private static final String[] TAG_LOCALES = { "de", "en", "it" };

    /**
     * Parses the JSON-String to a list of {@link SportsEquipment}s.
     * 
     * Example for such a .json File:
     * 
     * [{
      *  "de": { "name" : "bungsmatte", "alternative_names": ["Gymnastikmatte"] },
     *  "en": { "name" : "Exercise Mat" }
     * }, ...]
      *   
      * @param jsonString The String to parse.
      * 
      * @return A list of {@link SportsEquipment}s, null if an Error occurs.
      * 
     */
    @Override
    public List<SportsEquipment> parse(String jsonString) {
        List<SportsEquipment> sportsEquipmentList = new ArrayList<SportsEquipment>();

        JSONArray jsonArray;
        try {
            jsonArray = new JSONArray(jsonString);

            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject SportsEquipmentObject = jsonArray.getJSONObject(i);

                SportsEquipment m = null;

                for (String locale : TAG_LOCALES) {
                    if (SportsEquipmentObject.has(locale)) {
                        JSONObject languageObject = SportsEquipmentObject.getJSONObject(locale);

                        // name
                        String name = languageObject.getString(TAG_NAME);

                        // first name is primary name, all other names are alternative names
                        List<String> nameList = new ArrayList<String>();
                        nameList.add(name);

                        // alternative names   
                        if (languageObject.has(TAG_ALTERNATIVE_NAMES)) {
                            JSONArray alternativeNameJSONArray = languageObject.getJSONArray(TAG_ALTERNATIVE_NAMES);
                            String[] alternativeNameArray = this.jsonArrayToStringArray(alternativeNameJSONArray);

                            for (int t = 0; t < alternativeNameArray.length; t++) {
                                String altName = alternativeNameArray[t];
                                nameList.add(altName);
                            }
                        }

                        if (m == null) {
                            m = new SportsEquipment(new Locale(locale), nameList);
                        } else {
                            m.addNames(new Locale(locale), nameList);
                        }
                    }
                }

                // Log.d(TAG, "Finished parsing SportsEquipment: \n" + m.toDebugString());
                sportsEquipmentList.add(m);

            }

        } catch (JSONException e) {
            Log.e(TAG, "Error during parsing JSON File.", e);
            return null;
        }

        if (sportsEquipmentList.isEmpty())
            throw new AssertionError("JSON parsing failed: no SportsEquipments parsed.");
        return sportsEquipmentList;
    }

    private String[] jsonArrayToStringArray(JSONArray jsonArray) {
        return jsonArray.toString().substring(1, jsonArray.toString().length() - 1).replaceAll("\"", "").split(",");
    }

}