Github user m-hogue commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1986#discussion_r135896059
--- Diff:
nifi-nar-bundles/nifi-standard-services/nifi-ssl-context-bundle/nifi-ssl-context-service/src/main/java/org/apache/nifi/ssl/SSLContextServiceUtils.java
---
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.nifi.ssl;
+
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import javax.net.ssl.SSLContext;
+
+import org.apache.nifi.components.AllowableValue;
+
+public class SSLContextServiceUtils {
--- End diff --
You can indeed have static methods in interfaces, but they cannot be
overridden by child classes. They 'belong' to the interface. There were also
default methods added in Java 8, which can be overridden by child classes, but
they aren't static meaning that they can't be used in statically initialized
variables. For these reasons, i elected to put the methods in a util class -
but i totally understand the concern here.
See this SO article:
https://stackoverflow.com/questions/27833168/difference-between-static-and-default-methods-in-interface
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