net.mograsim.logic.ui/src/net/mograsim/logic/ui/util/JsonHandler.java

   1 package net.mograsim.logic.ui.util;
   2
   3 import java.io.BufferedReader;
   4 import java.io.FileInputStream;
   5 import java.io.FileWriter;
   6 import java.io.IOException;
   7 import java.io.InputStream;
   8 import java.io.InputStreamReader;
   9
  10 import com.google.gson.Gson;
  11 import com.google.gson.GsonBuilder;
  12
  13 public class JsonHandler
  14 {
  15         private static Gson parser = new GsonBuilder().setPrettyPrinting().create();
  16
  17         public static <T> T readJson(String path, Class<T> type) throws IOException
  18         {
  19                 try (FileInputStream jsonStream = new FileInputStream(path))
  20                 {
  21                         return readJson(jsonStream, type);
  22                 }
  23         }
  24
  25         /**
  26          * @param input The Stream is closed after being read
  27          */
  28         public static <T> T readJson(InputStream input, Class<T> type) throws IOException
  29         {
  30                 try (InputStreamReader reader = new InputStreamReader(input); BufferedReader bf = new BufferedReader(reader))
  31                 {
  32                         String json = bf.lines().dropWhile(s -> s.length() == 0 || s.charAt(0) != '{').reduce("", (x, y) -> x.concat(y));
  33                         T params = parser.fromJson(json, type);
  34                         return params;
  35                 }
  36         }
  37
  38         public static void writeJson(Object o, String path) throws IOException
  39         {
  40                 try (FileWriter writer = new FileWriter(path))
  41                 {
  42                         writer.write(String.format("mograsim version: %s\n", Version.jsonCompVersion.toString()));
  43                         writer.write(parser.toJson(o));
  44                 }
  45         }
  46 }