lh.api.showcase.client.referencedata.nearestairports.NearestAirportsResponseJsonParser.java Source code

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Here is the source code for lh.api.showcase.client.referencedata.nearestairports.NearestAirportsResponseJsonParser.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.nearestairports;

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

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;
import lh.api.showcase.client.referencedata.airports.Airport;

public class NearestAirportsResponseJsonParser implements JsonParser<List<NearestAirport>> {

    @SuppressWarnings("unused")
    private static Logger logger = Logger.getLogger("NearestAirportsResponseJsonParser");

    @Override
    public List<NearestAirport> parse(String json) {

        List<NearestAirport> ret = new ArrayList<NearestAirport>();

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

        JSONValue jsAirportResourceVal = jobj.get("NearestAirportResource");
        JSONObject jsAirportResourceObj = jsAirportResourceVal.isObject();

        JSONValue jsAirportsVal = jsAirportResourceObj.get("Airports");
        JSONObject jsAirportsObj = jsAirportsVal.isObject();

        JSONValue jsAirportVal = jsAirportsObj.get("Airport");
        JSONObject jsAirportObj = jsAirportVal.isObject();

        if (jsAirportObj == null) {
            JSONArray jarrayAirports = jsAirportVal.isArray();
            if (jarrayAirports != null) {
                for (int i = 0; i < jarrayAirports.size(); ++i) {
                    JSONObject jsAirportObject = jarrayAirports.get(i).isObject();
                    if (jsAirportObject == null) {
                        continue;
                    }
                    NearestAirport na = getNearestAirportInfo(jsAirportObject);
                    if (na != null) {
                        ret.add(na);
                    }
                }
            }
        } else {
            NearestAirport na = getNearestAirportInfo(jsAirportObj);
            if (na != null) {
                ret.add(na);
            }
        }
        return ret;
    }

    private NearestAirport getNearestAirportInfo(JSONObject jsAirportObj) {

        Airport airport = JsonParserUtils.getAirportInfo(jsAirportObj);
        if (airport != null) {

            JSONObject jsProximityVal = jsAirportObj.get("Distance").isObject();
            JSONNumber jsDistanceNum = jsProximityVal.get("Value").isNumber();
            JSONString jsUomStr = jsProximityVal.get("UOM").isString();

            return new NearestAirport(airport, jsDistanceNum.doubleValue(), jsUomStr.toString().replace("\"", ""));
        }
        return null;
    }
}