Java tutorial
/** * Copyright (c) 2016-2017 BITPlan GmbH * * http://www.bitplan.com * * This file is part of the Opensource project at: * https://github.com/BITPlan/com.bitplan.simplerest * * 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 com.bitplan.json; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; import org.apache.commons.io.FileUtils; /** * for jsonable POJOs * @author wf * */ public interface JsonAble extends AsJson { public static String appName = "simplerest"; /** * reinitialize me after being reloaded from json */ public void reinit(); /** * save me to my Json File * @throws IOException */ default void save() throws IOException { File jsonFile = getJsonFile(); if (!jsonFile.getParentFile().isDirectory()) jsonFile.getParentFile().mkdirs(); FileUtils.writeStringToFile(jsonFile, this.asJson(), "UTF-8"); } default File getJsonFile() { File jsonFile = getJsonFile(this.getClass().getSimpleName()); return jsonFile; } static File getJsonFile(String name) { String home = System.getProperty("user.home"); File configDirectory = new File(home + "/." + appName + "/"); String jsonFileName = name + ".json"; File jsonFile = new File(configDirectory, jsonFileName); return jsonFile; } /** * get my values a a map * @return - the map of values */ @SuppressWarnings("unchecked") default Map<String, Object> asMap() { Map<String, Object> map = new HashMap<String, Object>(); map = (Map<String, Object>) getGson().fromJson(this.asJson(), map.getClass()); return map; } /** * initialize my values from the given map * @param map */ public void fromMap(Map<String, Object> map); }