Many changes

src/main/java/com/github/netricecake/loco/util/BsonUtil.java

@@ -0,0 +1,42 @@
+package com.github.netricecake.loco.util;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import org.bson.BsonBinaryReader;
+import org.bson.RawBsonDocument;
+import org.bson.codecs.BsonDocumentCodec;
+import org.bson.codecs.DecoderContext;
+
+import java.nio.ByteBuffer;
+
+public class BsonUtil {
+
+    private final static BsonDocumentCodec bsonDocumentCodec = new BsonDocumentCodec();
+    private final static Gson gson = new Gson();
+
+    public static byte[] jsonToBson(String json) {
+        var rawBson = RawBsonDocument.parse(json);
+        ByteBuffer buffer = rawBson.getByteBuffer().asNIO();
+        byte[] exactBytes = new byte[buffer.remaining()];
+        buffer.get(exactBytes);
+        return exactBytes;
+    }
+
+    public static byte[] jsonObjectToBson(JsonObject jsonObject) {
+        return jsonToBson(gson.toJson(jsonObject));
+    }
+
+    public static String bsonToJson(byte[] bson) {
+        var doc = bsonDocumentCodec.decode(
+                new BsonBinaryReader(ByteBuffer.wrap(bson)),
+                DecoderContext.builder().build()
+        );
+        return doc.toString();
+    }
+
+    public static JsonObject bsonToJsonObject(byte[] bson) {
+        return JsonParser.parseString(bsonToJson(bson)).getAsJsonObject();
+    }
+
+}