--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uidesigner/com.nokia.sdt.emf.dm/src/com/nokia/sdt/emf/dm/IComponentManifest.java	Fri Apr 03 23:33:03 2009 +0100
@@ -0,0 +1,86 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+package com.nokia.sdt.emf.dm;
+
+import java.util.Map;
+
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EObject;
+
+import com.nokia.sdt.component.IComponentSet;
+
+/**
+ * The component manifest records information about
+ * the components used in a model.
+ * @model
+ */
+public interface IComponentManifest extends EObject {
+
+	/**
+	 * @model type="com.nokia.sdt.emf.dm.IComponentManifestEntry" containment="true"
+	 * @return a list of IComponentManifestEntry
+	 */
+	EList getEntries();
+	
+	/**
+	 * Return the entry for a component, if present.
+	 * @param componentID
+	 * @return the entry, or null if none
+	 */
+	IComponentManifestEntry lookup(String componentID);
+	
+	/**
+	 * Update the manifest to contain an entry for each
+	 * component referenced in the model. The entry for
+	 * each component will match the version of the
+	 * component currently loaded
+	 */
+	void update(IDesignerData root);
+	
+	/**
+	 * Check for updated components by comparing
+	 * the current manifest values with the current
+	 * components. 
+	 * Map keys are component IDs, values are UpdatedComponentInfo
+	 * objects.
+	 * For the original model format that did not have a component
+	 * manifest this method has the side effect of updating the manifest. Otherwise
+	 * the manifest is not modified.
+	 * @return a map if any updated components, null if none
+	 */
+	Map<String, ComponentManifestDelta> getComponentDeltas(IDesignerData designerData);
+	
+	/**
+	 * Update the manifest status to indicate that it is
+	 * in-synch with the on-disk state of the model. This 
+	 * occurs at two points: when a model was just successfully
+	 * loaded and when it was successfully saved. Note that
+	 * on the load we trust that the data doesn't lie -- it would
+	 * be possible to hand-edit the XML to break that.
+	 */
+	void markSaved();
+	
+	/**
+	 * Return true if the manifest contains entries
+	 * related to the last save operation. This is the case
+	 * if the model has loaded from a file and not updated
+	 * since being loaded. This indicates the manifest can 
+	 * be used to determine updated components.
+	 * 
+	 */
+	boolean reflectsLastSave();
+}