Added file version and closed resource leak

[Mograsim.git] / net.mograsim.logic.ui / src / net / mograsim / logic / ui / util / JsonHandler.java

diff --git a/net.mograsim.logic.ui/src/net/mograsim/logic/ui/util/JsonHandler.java b/net.mograsim.logic.ui/src/net/mograsim/logic/ui/util/JsonHandler.java
new file mode 100644 (file)
index 0000000..94231a3
--- /dev/null
+++ b/net.mograsim.logic.ui/src/net/mograsim/logic/ui/util/JsonHandler.java
@@ -0,0 +1,35 @@
+package net.mograsim.logic.ui.util;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+public class JsonHandler
+{
+       private static Gson parser = new GsonBuilder().setPrettyPrinting().create();
+
+       @SuppressWarnings("resource")
+       public static <T> T readJson(String path, Class<T> type) throws IOException
+       {
+               FileReader reader = new FileReader(path);
+               BufferedReader bf = new BufferedReader(reader);
+               bf.readLine(); // Skip version
+               String json = bf.lines().dropWhile(s -> s.length() == 0 || s.charAt(0) != '{').reduce("", (x, y) -> x.concat(y));
+               T params = parser.fromJson(json, type);
+               reader.close();
+               return params;
+       }
+
+       public static void writeJson(Object o, String path) throws IOException
+       {
+               @SuppressWarnings("resource")
+               FileWriter writer = new FileWriter(path);
+               writer.write(String.format("mograsim version: %s\n", Version.current.toString()));
+               writer.write(parser.toJson(o));
+               writer.close(); // TODO: Insure that writer is closed
+       }
+}