CM-690 virtualization

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@117474 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/virtual/ref/Protocols.java

@@ -0,0 +1,56 @@
+/* 
+ * Copyright (C) 2005-2015 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see http://www.gnu.org/licenses/.
+ */
+
+package org.alfresco.repo.virtual.ref;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Common {@link Reference} protocols.
+ */
+public enum Protocols
+{
+    NODE(new NodeProtocol()), VIRTUAL(new VirtualProtocol()), VANILLA(new VanillaProtocol());
+
+    private static volatile Map<String, Protocol> protocolsMap;
+
+    public static synchronized Protocol fromName(String name)
+    {
+        return protocolsMap.get(name);
+    }
+
+    private synchronized static void register(Protocol protocol)
+    {
+        if (protocolsMap == null)
+        {
+            protocolsMap = new HashMap<>();
+        }
+        protocolsMap.put(protocol.name,
+                         protocol);
+    }
+
+    public final Protocol protocol;
+
+    Protocols(Protocol protocol)
+    {
+        this.protocol = protocol;
+        register(protocol);
+    }
+}