323802: [General] Papyrus shall provide a read only mode

https://bugs.eclipse.org/bugs/show_bug.cgi?id=323802

Implement a custom TransactionChangeRecorder that aborting the transaction if a read-only object is modified.

Add a new extension point oep.infra.gmfdiag.commands.historyListeners for registration of listeners to be added to the Papyrus operation history.  Implement a listener that detects operations that failed because of rollback and presents a status dialog explaining the rollback.

Add a new label provider for EMF Resources to support presentation of the rollback dialog when an affected object is a resource.

1 files changed, 17 insertions, 2 deletions

diff --git a/extraplugins/cdo/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/core/resource/CDOAwareTransactionalEditingDomain.java b/extraplugins/cdo/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/core/resource/CDOAwareTransactionalEditingDomain.java
index 723ae2fc3dd..f9608413a5e 100644
--- a/extraplugins/cdo/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/core/resource/CDOAwareTransactionalEditingDomain.java
+++ b/extraplugins/cdo/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/core/resource/CDOAwareTransactionalEditingDomain.java
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Copyright (c) 2013 CEA LIST.
+ * Copyright (c) 2013, 2014 CEA LIST and others.
  * 
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
@@ -8,6 +8,7 @@
  *
  * Contributors:
  *   CEA LIST - Initial API and implementation
+ *   Christian W. Damus (CEA) - bug 323802
  *****************************************************************************/
 package org.eclipse.papyrus.cdo.core.resource;
 
@@ -19,6 +20,7 @@ import org.eclipse.emf.cdo.view.CDOViewInvalidationEvent;
 import org.eclipse.emf.common.notify.AdapterFactory;
 import org.eclipse.emf.common.notify.Notification;
 import org.eclipse.emf.ecore.resource.ResourceSet;
+import org.eclipse.emf.transaction.NotificationFilter;
 import org.eclipse.emf.transaction.ResourceSetChangeEvent;
 import org.eclipse.emf.transaction.ResourceSetListener;
 import org.eclipse.emf.transaction.Transaction;
@@ -40,7 +42,19 @@ public class CDOAwareTransactionalEditingDomain extends PapyrusROTransactionalEd
 
 	@Override
 	protected TransactionChangeRecorder createChangeRecorder(ResourceSet rset) {
-		return new DawnTransactionChangeRecorder(this, rset);
+		return new DawnTransactionChangeRecorder(this, rset) {
+
+			@Override
+			protected void appendNotification(Notification notification) {
+				// Append to the transaction first
+				super.appendNotification(notification);
+
+				if(!NotificationFilter.READ.matches(notification)) {
+					// Check whether we are modifying a read-only object
+					assertNotReadOnly(notification.getNotifier());
+				}
+			}
+		};
 	}
 
 	protected void fireResourceSetChanged(CDOViewInvalidationEvent event) {
@@ -53,6 +67,7 @@ public class CDOAwareTransactionalEditingDomain extends PapyrusROTransactionalEd
 
 		CDOUtils.notify(this, new Runnable() {
 
+			@Override
 			public void run() {
 				for(ResourceSetListener element : listeners) {
 					try {