1 files changed, 47 insertions, 0 deletions
diff --git a/src/main/java/org/onap/sdc/helmvalidator/helm/versions/SystemEnvVersionsReader.java b/src/main/java/org/onap/sdc/helmvalidator/helm/versions/SystemEnvVersionsReader.java
new file mode 100644
index 0000000..8cccd2b
--- /dev/null
+++ b/src/main/java/org/onap/sdc/helmvalidator/helm/versions/SystemEnvVersionsReader.java
@@ -0,0 +1,47 @@
+/*
+ * ============LICENSE_START=======================================================
+ * SDC-HELM-VALIDATOR
+ * ================================================================================
+ * 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.sdc.helmvalidator.helm.versions;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import org.springframework.stereotype.Service;
+
+@Service
+public class SystemEnvVersionsReader {
+
+    private static final String HELM_SUPPORTED_VERSIONS = "HELM_SUPPORTED_VERSIONS";
+    private static final String DELIMITER = ",";
+
+    List<String> readVersions() {
+        return Arrays.stream(getSupportedVersionsFromEnv()
+            .split(DELIMITER))
+            .filter(Predicate.not(String::isBlank))
+            .collect(Collectors.toList());
+    }
+
+    String getSupportedVersionsFromEnv() {
+        return Optional.ofNullable(System.getenv(HELM_SUPPORTED_VERSIONS))
+            .orElse("");
+    }
+}