Java tutorial
/** * Copyright 2014 Gustavo Martin Morcuende * * 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 name.gumartinm.weather.information.parser; import com.fasterxml.jackson.core.JsonFactory; import com.fasterxml.jackson.core.JsonParseException; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.core.JsonToken; import java.io.IOException; import java.util.ArrayList; import name.gumartinm.weather.information.model.currentweather.Clouds; import name.gumartinm.weather.information.model.currentweather.Coord; import name.gumartinm.weather.information.model.currentweather.Current; import name.gumartinm.weather.information.model.currentweather.Main; import name.gumartinm.weather.information.model.currentweather.Rain; import name.gumartinm.weather.information.model.currentweather.Snow; import name.gumartinm.weather.information.model.currentweather.Sys; import name.gumartinm.weather.information.model.currentweather.Weather; import name.gumartinm.weather.information.model.currentweather.Wind; public class JPOSCurrentParser { public Current retrieveCurrenFromJPOS(final String jsonData) throws JsonParseException, IOException { final JsonFactory f = new JsonFactory(); final Current currentWeatherData = new Current(); currentWeatherData.setClouds(new Clouds()); currentWeatherData.setCoord(new Coord()); currentWeatherData.setMain(new Main()); currentWeatherData.setRain(new Rain()); currentWeatherData.setSys(new Sys()); currentWeatherData.setSnow(new Snow()); currentWeatherData.setWeather(new ArrayList<Weather>()); currentWeatherData.setWind(new Wind()); final JsonParser jParser = f.createParser(jsonData); this.getCurrentWeatherData(currentWeatherData, jParser); return currentWeatherData; } private void getCurrentWeatherData(final Current currentWeatherData, final JsonParser jParser) throws JsonParseException, IOException { if (jParser.nextToken() == JsonToken.START_OBJECT) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String fieldname = jParser.getCurrentName(); final JsonToken nextToken = jParser.nextToken(); if (nextToken == JsonToken.START_OBJECT) { this.getCurrentWeatherDataObjects(currentWeatherData, jParser, fieldname); } if (nextToken == JsonToken.START_ARRAY) { JsonToken tokenNext = jParser.nextToken(); while (tokenNext != JsonToken.END_ARRAY) { if (tokenNext == JsonToken.START_OBJECT) { this.getCurrentWeatherDataObjects(currentWeatherData, jParser, fieldname); } tokenNext = jParser.nextToken(); } } if ((nextToken == JsonToken.VALUE_NUMBER_INT) || (nextToken == JsonToken.VALUE_STRING)) { this.getCurrentWeatherDataObjects(currentWeatherData, jParser, fieldname); } } } } private void getCurrentWeatherDataObjects(final Current currentWeatherData, final JsonParser jParser, final String fieldname) throws JsonParseException, IOException { if ("coord".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("lon".equals(namefield)) { currentWeatherData.getCoord().setLon(jParser.getDoubleValue()); } if ("lat".equals(namefield)) { currentWeatherData.getCoord().setLat(jParser.getDoubleValue()); } } } if ("sys".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("message".equals(namefield)) { currentWeatherData.getSys().setMessage(jParser.getDoubleValue()); } if ("country".equals(namefield)) { currentWeatherData.getSys().setCountry(jParser.getValueAsString()); } if ("sunrise".equals(namefield)) { currentWeatherData.getSys().setSunrise(jParser.getValueAsLong()); } if ("sunset".equals(namefield)) { currentWeatherData.getSys().setSunset(jParser.getValueAsLong()); } } } if ("weather".equals(fieldname)) { final Weather weather = new Weather(); currentWeatherData.getWeather().add(weather); while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("id".equals(namefield)) { weather.setId(jParser.getIntValue()); } if ("main".equals(namefield)) { weather.setMain(jParser.getText()); } if ("description".equals(namefield)) { weather.setDescription(jParser.getText()); } if ("icon".equals(namefield)) { weather.setIcon(jParser.getText()); } } } if ("base".equals(fieldname)) { currentWeatherData.setBase(jParser.getText()); } if ("main".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("temp".equals(namefield)) { currentWeatherData.getMain().setTemp(jParser.getDoubleValue()); } if ("temp_min".equals(namefield)) { currentWeatherData.getMain().setTemp_min(jParser.getDoubleValue()); } if ("temp_max".equals(namefield)) { currentWeatherData.getMain().setTemp_max(jParser.getDoubleValue()); } if ("pressure".equals(namefield)) { currentWeatherData.getMain().setPressure(jParser.getDoubleValue()); } if ("sea_level".equals(namefield)) { currentWeatherData.getMain().setSea_level(jParser.getDoubleValue()); } if ("grnd_level".equals(namefield)) { currentWeatherData.getMain().setGrnd_level(jParser.getDoubleValue()); } if ("humidity".equals(namefield)) { currentWeatherData.getMain().setHumidity(jParser.getDoubleValue()); } } } if ("wind".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("speed".equals(namefield)) { currentWeatherData.getWind().setSpeed(jParser.getDoubleValue()); } if ("deg".equals(namefield)) { currentWeatherData.getWind().setDeg(jParser.getDoubleValue()); } } } if ("clouds".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("all".equals(namefield)) { currentWeatherData.getClouds().setAll(jParser.getDoubleValue()); } } } if ("dt".equals(fieldname)) { currentWeatherData.setDt(jParser.getLongValue()); } if ("rain".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("3h".equals(namefield)) { currentWeatherData.getRain().set3h(jParser.getDoubleValue()); } } } if ("snow".equals(fieldname)) { while (jParser.nextToken() != JsonToken.END_OBJECT) { final String namefield = jParser.getCurrentName(); jParser.nextToken(); // move to value if ("3h".equals(namefield)) { currentWeatherData.getSnow().set3h(jParser.getDoubleValue()); } } } if ("id".equals(fieldname)) { currentWeatherData.setId(jParser.getLongValue()); } if ("name".equals(fieldname)) { currentWeatherData.setName(jParser.getText()); } if ("cod".equals(fieldname)) { currentWeatherData.setCod(jParser.getIntValue()); } } }