Add support for parsing AUTO, HETERO and MULTI from json config (#605)

* Add support for parsing AUTO, HETERO and MULTI from json config

* Fix lint issues

* Address review comments

Author: preetha-intel

onnxruntime/core/providers/openvino/backends/basic_backend.cc

@@ -284,7 +284,7 @@ void BasicBackend::PopulateConfigValue(ov::AnyMap& device_config) {
       //// Parse to get the device mode (e.g., "AUTO:CPU,GPU" -> "AUTO")
       std::unordered_set<std::string> supported_mode = {"AUTO", "HETERO", "MULTI"};
       auto device_mode = find_device_type_mode(session_context_.device_type);
-      ORT_ENFORCE(supported_mode.find(device_mode) != supported_mode.end(), " Invalid device mode is passed : ", session_context_.device_type);
+      ORT_ENFORCE(supported_mode.find(device_mode)!=supported_mode.end(), " Invalid device mode is passed : " , session_context_.device_type);
       // Parse individual devices (e.g., "AUTO:CPU,GPU" -> ["CPU", "GPU"])
       auto individual_devices = parse_individual_devices(session_context_.device_type);
       if (!device_mode.empty()) individual_devices.emplace_back(device_mode);

onnxruntime/core/providers/openvino/openvino_provider_factory.cc

@@ -221,10 +221,19 @@ struct OpenVINO_Provider : Provider {
             continue;
           }
 
-          // Ensure that the value for each device is an object (PROPERTY -> VALUE)
-          if (!value.is_object()) {
-            ORT_THROW("Invalid JSON structure: Expected an object for device properties.");
-          }
+          for (auto& [key, value] : json_config.items()) {
+            ov::AnyMap inner_map;
+            std::set<std::string> valid_ov_devices = {"CPU", "GPU", "NPU", "AUTO", "HETERO", "MULTI"};
+            // Ensure the key is one of "CPU", "GPU", or "NPU"
+            if (valid_ov_devices.find(key) == valid_ov_devices.end()) {
+              LOGS_DEFAULT(WARNING) << "Unsupported device key: " << key << ". Skipping entry.\n";
+              continue;
+            }
+
+            // Ensure that the value for each device is an object (PROPERTY -> VALUE)
+            if (!value.is_object()) {
+              ORT_THROW("Invalid JSON structure: Expected an object for device properties.");
+            }
 
           for (auto& [inner_key, inner_value] : value.items()) {
             if (inner_value.is_string()) {