undoing stray changes.

provider/notification-azure/src/main/java/org/opengroup/osdu/notification/provider/azure/pubsub/EventGridHandshakeHandler.java

+// Copyright © Microsoft Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package org.opengroup.osdu.notification.provider.azure.pubsub;
+
+import com.google.gson.JsonObject;
+import org.opengroup.osdu.core.common.model.http.AppException;
+import org.opengroup.osdu.notification.provider.interfaces.IPubsubHandshakeHandler;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+
+@Component
+public class EventGridHandshakeHandler implements IPubsubHandshakeHandler {
+
+    @Autowired
+    private EventGridRequestBodyExtractor eventGridRequestBodyExtractor;
+
+    /**
+     * Extract Handshake response string form  Handshake request.
+     * TODO: Check if there is a need to verify subscription name with
+     *  registration service, before verifying the endpoint.
+     * @return validation string
+     */
+    @Override
+    public String getHandshakeResponse() {
+        String response;
+
+        try {
+            String validationCode = this.eventGridRequestBodyExtractor.getValidationCodeForHandshake();
+            JsonObject jsonResponse = new JsonObject();
+            jsonResponse.addProperty("ValidationResponse", validationCode);
+
+            response = jsonResponse.toString();
+        } catch (Exception exception) {
+            throw new AppException(HttpStatus.BAD_REQUEST.value(), "Request payload parsing error",
+                    "Unable to parse request payload.", exception);
+        }
+
+        return response;
+    }
+}
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