From 8531f0a28d329be55ab7dd99a055e3a0dbb85f5f Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Wed, 7 Aug 2024 17:02:04 +0200
Subject: [PATCH] added BufferedJSON.exists() method, use it in
 get_time/get_data

---
 dap/utils/bufjson.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dap/utils/bufjson.py b/dap/utils/bufjson.py
index 342e5be..7ac7be6 100644
--- a/dap/utils/bufjson.py
+++ b/dap/utils/bufjson.py
@@ -25,11 +25,20 @@ class BufferedJSON:
 
 
     def get_time(self):
+        if not self.exists():
+            return -1
         return os.path.getmtime(self.fname)
 
     def get_data(self, *args, **kwargs):
+        if not self.exists():
+            return {}
         return json_load(self.fname, *args, **kwargs)
 
+    def exists(self):
+        if not self.fname:
+            return False
+        return os.path.exists(self.fname)
+
 
 
 def json_load(filename, *args, **kwargs):