lh.api.showcase.client.referencedata.countries.CountriesResponseJsonParser.java Source code

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Here is the source code for lh.api.showcase.client.referencedata.countries.CountriesResponseJsonParser.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.countries;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import lh.api.showcase.client.JsonParser;
import lh.api.showcase.client.JsonParserUtils;

import com.google.gwt.json.client.JSONArray;
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;

public class CountriesResponseJsonParser implements JsonParser<List<Country>> {

    private static Logger logger = Logger.getLogger("CountriesResponseJsonParser");

    @Override
    public List<Country> parse(String json) {
        List<Country> countries = new ArrayList<Country>();

        logger.log(Level.INFO, "JSON parsing");
        JSONValue jsv = JSONParser.parseStrict(json);
        JSONObject jobj = jsv.isObject();

        JSONValue jsCountriesResourceVal = jobj.get("CountryResource");
        JSONObject jsCountriesResourceObj = jsCountriesResourceVal.isObject();

        JSONValue jsCountriesVal = jsCountriesResourceObj.get("Countries");
        JSONObject jsCountriesObj = jsCountriesVal.isObject();

        JSONValue jsCountryVal = jsCountriesObj.get("Country");
        JSONObject jsCountryObj = jsCountryVal.isObject();

        if (jsCountryObj == null) {
            JSONArray jarrayCountries = jsCountryVal.isArray();
            if (jarrayCountries != null) {
                for (int i = 0; i < jarrayCountries.size(); ++i) {

                    JSONObject jsCountryObject = jarrayCountries.get(i).isObject();
                    if (jsCountryObject == null) {
                        continue;
                    }
                    getCountryInfo(jsCountryObject, countries);
                }
            }
        } else {
            getCountryInfo(jsCountryObj, countries);
        }
        return countries;
    }

    private void getCountryInfo(JSONObject jsCountryObj, List<Country> countries) {
        JSONValue jsCountryCodeVal = jsCountryObj.get("CountryCode");
        JSONString jsCountryCodeStr = (jsCountryCodeVal == null) ? (null) : (jsCountryCodeVal.isString());

        JSONValue jsCountryZoneVal = jsCountryObj.get("ZoneCode");
        JSONString jsZoneCodeStr = (jsCountryZoneVal == null) ? (null) : (jsCountryZoneVal.isString());

        JSONValue jsNamesVal = jsCountryObj.get("Names");
        JSONObject jsNamesObj = jsNamesVal.isObject();

        countries.add(
                new Country((jsCountryCodeStr == null) ? ("") : (jsCountryCodeStr.toString().replace("\"", "")),
                        (jsZoneCodeStr == null) ? ("") : (jsZoneCodeStr.toString().replace("\"", "")),
                        JsonParserUtils.getNamesMap(jsNamesObj)));
    }
}