com.fortydegree.ra.data.JsonUnmarshaller.java Source code

Introduction

Here is the source code for com.fortydegree.ra.data.JsonUnmarshaller.java

Source

/*
 * Promenade au Thabor
 * Copyright (C) 2011 40degree (Marc Haussaire & Fabien Ric)
 *
 * http://www.40degree.com
 * 
 * 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 com.fortydegree.ra.data;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

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

import com.fortydegree.ra.model.Marker;

public class JsonUnmarshaller {

    public static final int MAX_JSON_OBJECTS = 1000;

    public static List<Marker> load(JSONObject root) throws JSONException {
        JSONObject jo = null;
        JSONArray dataArray = null;
        List<Marker> markers = new ArrayList<Marker>();

        if (root.has("results")) {
            dataArray = root.getJSONArray("results");

            int top = Math.min(MAX_JSON_OBJECTS, dataArray.length());

            for (int i = 0; i < top; i++) {
                jo = dataArray.getJSONObject(i);
                Marker ma = processGeoserviceJSONObject(jo);
                if (ma != null)
                    markers.add(ma);
            }
        }

        return markers;
    }

    public static Marker processGeoserviceJSONObject(JSONObject jo) throws JSONException {
        String type = jo.getString("type");
        String metadata = jo.getString("metadata");
        JSONObject jsonMetadata = new JSONObject(metadata);
        String title = jsonMetadata.optString("title");

        Marker m = new Marker(jo.getDouble("latitude"), jo.getDouble("longitude"), jo.getDouble("altitude"));
        m.title = title;
        m.distance = jo.getDouble("distance");

        @SuppressWarnings("rawtypes")
        Iterator metadataIter = jsonMetadata.keys();
        while (metadataIter.hasNext()) {
            String key = metadataIter.next().toString();
            m.setData(key, jsonMetadata.getString(key));
        }
        m.setData("title", title);
        m.setData("type", type);

        return m;
    }

}