/**
    * Copyright 1&1 Internet AG, https://github.com/1and1/
    *
    * 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 net.oneandone.sushi;
  
  import net.oneandone.sushi.fs.Node;
  import net.oneandone.sushi.fs.World;
  import net.oneandone.sushi.metadata.Type;
  import net.oneandone.sushi.metadata.reflect.ReflectSchema;
  
  import java.io.IOException;
  
  /**
   * To work with property files, use create a Pojo representing all fields of the file, and use
   * Sushi to map between instances and its file. This exsample demonstrates how to save and load
   * "Config" instances to and from a property file.
   */
  public class PropertiesSample {
      private static final World world = new World();
  
      /** Serialize object to xml and load the result back into an object */
      public static void main(String[] args) throws IOException {
          Node file;
          Config config;
  
          file = world.getTemp().createTempFile();
          config = new Config();
          config.save(file);
          System.out.println("default config created:");
          System.out.println(file.readString());
  
          config.javaHome = "changed";
          config.version = 2;
          config.save(file);
          System.out.println("saved changes:");
          System.out.println(file.readString());
  
          config = Config.load(file);
          System.out.println("loaded config: " + config);
      }
      
      public static class Config {
          private static final Type TYPE = new ReflectSchema(world).type(Config.class);
  
          public static Config load(Node file) throws IOException {
              return (Config) TYPE.loadProperties(file.readProperties()).get();
          }
  
          public String javaHome;
          public int version;
          public Complex complex;
  
          public Config() {
              this("", 0, new Complex());
          }
  
          public Config(String javaHome, int version, Complex complex) {
              this.javaHome = javaHome;
              this.version = version;
              this.complex = complex;
          }
  
          public void save(Node file) throws IOException {
              file.writeProperties(TYPE.instance(this).toProperties());
          }
  
          @Override
          public String toString() {
              return "javaHome=" + javaHome + ", version=" + version;
          }
      }
  
      public static class Complex {
          public int left;
          public int right;
      }
  }