Merge DEV to HEAD

ContentDiskDriver rework.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@29451 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/filesys/repo/rules/Scenario.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2005-2010 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.filesys.repo.rules;
+
+import java.util.List;
+
+/**
+ * A scenario is a factory for scenario instances.
+ * 
+ */
+public interface Scenario
+{
+    /**
+     * Create a new ScenarioInstance
+     * <p>
+     * If the scenario is interested in the specified operation then 
+     * return a new scenario instance.
+     * @param currentInstances the current instances of all scenarios. 
+     * @param operation the operation to be performed
+     * @return the scenario instance or null if a new instance is not required.
+     */
+    ScenarioInstance createInstance(final List<ScenarioInstance> currentInstances, Operation operation);
+      
+    
+}