1 files changed, 78 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcae/common/validator/BatchEventValidator.java b/src/main/java/org/onap/dcae/common/validator/BatchEventValidator.java
new file mode 100644
index 00000000..ea920740
--- /dev/null
+++ b/src/main/java/org/onap/dcae/common/validator/BatchEventValidator.java
@@ -0,0 +1,78 @@
+/*
+ * ============LICENSE_START=======================================================
+ * VES Collector
+ * ================================================================================
+ * Copyright (C) 2021 Nokia. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.dcae.common.validator;
+
+import io.vavr.control.Try;
+import org.json.JSONException;
+import org.onap.dcae.common.model.VesEvent;
+import org.onap.dcae.restapi.ApiException;
+import org.onap.dcae.restapi.EventValidatorException;
+
+import java.util.List;
+
+import static java.util.stream.Collectors.toSet;
+import static org.onap.dcae.restapi.ApiException.DIFFERENT_DOMAIN_FIELDS_IN_BATCH_EVENT;
+import static org.onap.dcae.restapi.ApiException.DIFFERENT_STND_DEFINED_NAMESPACE_WHEN_DOMAIN_STND_DEFINED;
+
+public class BatchEventValidator {
+
+    private BatchEventValidator() {
+    }
+
+    /**
+     * Check if value of domain fields are the same in every event,
+     * in case of stndDefined check stndDefinedNamespace fields
+     *
+     * @param events list of checked ves events
+     * @throws EventValidatorException when domain fields value or stndDefinedNamespace fields value are note the same
+     */
+    public static void executeBatchEventValidation(List<VesEvent> events) throws EventValidatorException {
+        if (hasNotEveryEventSameDomain(events)) {
+            throw new EventValidatorException(DIFFERENT_DOMAIN_FIELDS_IN_BATCH_EVENT);
+        }
+        if (isDomainStndDefined(events) && hasNotSameStndDefinedNamespace(events)) {
+            throw new EventValidatorException(DIFFERENT_STND_DEFINED_NAMESPACE_WHEN_DOMAIN_STND_DEFINED);
+        }
+    }
+
+    private static boolean hasNotEveryEventSameDomain(List<VesEvent> events) {
+        return events.stream()
+                .map(VesEvent::getDomain)
+                .collect(toSet())
+                .size() != 1;
+    }
+
+    private static boolean hasNotSameStndDefinedNamespace(List<VesEvent> events)  {
+        return Try.of(() -> isAllStndDefinedNamespace(events))
+                .getOrElseThrow(() -> new EventValidatorException(ApiException.MISSING_NAMESPACE_PARAMETER));
+    }
+
+    private static boolean isAllStndDefinedNamespace(List<VesEvent> events) {
+        return events.stream()
+                .map(e -> e.getStndDefinedNamespace().orElse(""))
+                .collect(toSet())
+                .size() != 1;
+    }
+
+    private static boolean isDomainStndDefined(List<VesEvent> events) throws JSONException{
+        return events.stream()
+                .allMatch((e -> e.getDomain().equals("stndDefined")));
+    }
+}