lh.api.showcase.client.referencedata.cities.CitiesResponseJsonParser.java Source code

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Here is the source code for lh.api.showcase.client.referencedata.cities.CitiesResponseJsonParser.java

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/*
 * Copyright 2015 Loic Merckel
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package lh.api.showcase.client.referencedata.cities;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;
import lh.api.showcase.client.JsonParser;
import lh.api.showcase.client.JsonParserUtils;

public class CitiesResponseJsonParser implements JsonParser<ArrayList<City>> {

    @Override
    public ArrayList<City> parse(String json) {

        ArrayList<City> ret = new ArrayList<City>();

        JSONValue jsv = JSONParser.parseStrict(json);
        JSONObject jobj = jsv.isObject();

        JSONValue jsCityResourceVal = jobj.get("CityResource");
        JSONObject jsCityResourceObj = jsCityResourceVal.isObject();

        JSONValue jsCitiesVal = jsCityResourceObj.get("Cities");
        JSONObject jsCitiesObj = jsCitiesVal.isObject();

        JSONValue jsCityVal = jsCitiesObj.get("City");
        JSONObject jsCityObj = jsCityVal.isObject();

        if (jsCityObj == null) {
            JSONArray jarrayCities = jsCityVal.isArray();
            if (jarrayCities != null) {
                for (int i = 0; i < jarrayCities.size(); ++i) {
                    JSONObject jsCityObject = jarrayCities.get(i).isObject();
                    if (jsCityObject == null) {
                        continue;
                    }
                    City city = getCityInfo(jsCityObject);
                    if (city != null) {
                        ret.add(city);
                    }
                }
            }
        } else {
            City city = getCityInfo(jsCityObj);
            if (city != null) {
                ret.add(city);
            }
        }
        return ret;
    }

    private City getCityInfo(JSONObject jsCityObj) {
        JSONValue jsCityCodeVal = jsCityObj.get("CityCode");
        JSONValue jsCountryCodeVal = jsCityObj.get("CountryCode");

        if (jsCityCodeVal == null || jsCountryCodeVal == null) {
            return null;
        }
        JSONString jsCityCodeStr = jsCityCodeVal.isString();
        JSONString jsCountryCodeStr = jsCountryCodeVal.isString();

        JSONNumber jsLatitudeNum = null;
        JSONNumber jsLongitudeNum = null;
        JSONValue jsCoordinateVal = jsCityObj.get("Position");
        if (jsCoordinateVal != null) {
            JSONObject jsCoordinateObj = jsCoordinateVal.isObject().get("Coordinate").isObject();
            jsLatitudeNum = jsCoordinateObj.get("Latitude").isNumber();
            jsLongitudeNum = jsCoordinateObj.get("Longitude").isNumber();
        }

        JSONObject jsNamesObj = jsCityObj.get("Names").isObject();

        JSONValue jsAirportsVal = jsCityObj.get("Airports");
        JSONObject jsAirportsObj = (jsAirportsVal == null) ? (null) : (jsAirportsVal.isObject());

        return new City((jsCityCodeStr == null) ? ("") : (jsCityCodeStr.toString().replace("\"", "")),
                (jsCountryCodeStr == null) ? ("") : (jsCountryCodeStr.toString().replace("\"", "")),
                (jsLatitudeNum == null) ? (null) : (jsLatitudeNum.doubleValue()),
                (jsLongitudeNum == null) ? (null) : (jsLongitudeNum.doubleValue()), getAirportInfo(jsAirportsObj),
                JsonParserUtils.getNamesMap(jsNamesObj));
    }

    public static Set<String> getAirportInfo(JSONObject jsAirportsObj) {
        if (jsAirportsObj == null) {
            return null;
        }
        Set<String> ret = new HashSet<String>();
        JSONValue jsAirportCodeVal = jsAirportsObj.get("AirportCode");
        JSONString jsjsAirportCodeValStr = jsAirportCodeVal.isString();

        if (jsjsAirportCodeValStr == null) {

            JSONArray jsAirportCodeArray = jsAirportCodeVal.isArray();
            if (jsAirportCodeArray != null) {
                for (int i = 0; i < jsAirportCodeArray.size(); ++i) {

                    JSONString jsCodeStr = jsAirportCodeArray.get(i).isString();
                    if (jsCodeStr == null) {
                        continue;
                    }
                    ret.add(jsCodeStr.toString().replace("\"", ""));
                }
            }
        } else {
            ret.add(jsjsAirportCodeValStr.toString().replace("\"", ""));
        }
        return ret;
    }
}