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/AbstractProtocolMethod.java

@@ -0,0 +1,64 @@
+/* 
+ * 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;
+
+/**
+ * Handles protocol method dispatch. Not supported: base protocol
+ * dispatches. The vanilla protocol can be handled by default
+ * as the virtual protocol.
+ *
+ * @param <R>
+ */
+public abstract class AbstractProtocolMethod<R> implements ProtocolMethod<R>
+{
+    public static final String PATH_SEPARATOR = "/";
+
+    @Override
+    public R execute(VanillaProtocol vanillaProtocol, Reference reference) throws ProtocolMethodException
+    {
+        // cast to force virtual protocol execution
+
+        return execute((VirtualProtocol) vanillaProtocol,
+                       reference);
+    }
+
+    @Override
+    public R execute(VirtualProtocol virtualProtocol, Reference reference) throws ProtocolMethodException
+    {
+        return throwUnsupportedProtocolException(virtualProtocol);
+    }
+
+    @Override
+    public R execute(NodeProtocol protocol, Reference reference) throws ProtocolMethodException
+    {
+        return throwUnsupportedProtocolException(protocol);
+    }
+
+    private R throwUnsupportedProtocolException(Protocol protocol) throws ProtocolMethodException
+    {
+        throw new ProtocolMethodException("Unsupported protocol " + protocol);
+    }
+
+    @Override
+    public R execute(Protocol protocol, Reference reference) throws ProtocolMethodException
+    {
+        return throwUnsupportedProtocolException(protocol);
+    }
+}