MNT-18546: exclude the undeletable aspect from node copies

Added a policy implementation to the UndeletableAspect class so that
the aspect is not copied to other nodes.

This solves the problem where a document has the aspect added to it by
Cloud sync (for example) and is then checked-out, but may never be
checked in again (or editing cancelled) as the working copy included
the sys:undeletable aspect.

src/main/java/org/alfresco/repo/node/UndeletableAspect.java

@@ -27,6 +27,10 @@ package org.alfresco.repo.node;
 
 import org.alfresco.error.AlfrescoRuntimeException;
 import org.alfresco.model.ContentModel;
+import org.alfresco.repo.copy.CopyBehaviourCallback;
+import org.alfresco.repo.copy.CopyDetails;
+import org.alfresco.repo.copy.CopyServicePolicies;
+import org.alfresco.repo.copy.DoNothingCopyBehaviourCallback;
 import org.alfresco.repo.node.NodeServicePolicies;
 import org.alfresco.repo.node.NodeServicePolicies.BeforeDeleteNodePolicy;
 import org.alfresco.repo.policy.Behaviour;
@@ -35,6 +39,7 @@ import org.alfresco.repo.policy.PolicyComponent;
 import org.alfresco.service.cmr.repository.NodeRef;
 import org.alfresco.service.cmr.repository.NodeService;
 import org.alfresco.service.cmr.site.SiteService;
+import org.alfresco.service.namespace.NamespaceService;
 import org.alfresco.service.namespace.QName;
 
 /**
@@ -54,7 +59,8 @@ import org.alfresco.service.namespace.QName;
  * @author Neil Mc Erlean
  * @since 3.5.0
  */
-public class UndeletableAspect implements NodeServicePolicies.BeforeDeleteNodePolicy
+public class UndeletableAspect implements NodeServicePolicies.BeforeDeleteNodePolicy,
+        CopyServicePolicies.OnCopyNodePolicy
 {
    private PolicyComponent policyComponent;
    private NodeService nodeService;
@@ -87,6 +93,11 @@ public class UndeletableAspect implements NodeServicePolicies.BeforeDeleteNodePo
        this.policyComponent.bindClassBehaviour(BeforeDeleteNodePolicy.QNAME,
                ContentModel.ASPECT_UNDELETABLE,
                new JavaBehaviour(this, "beforeDeleteNode", Behaviour.NotificationFrequency.EVERY_EVENT));
+
+       policyComponent.bindClassBehaviour(
+               QName.createQName(NamespaceService.ALFRESCO_URI, "getCopyCallback"),
+               ContentModel.ASPECT_UNDELETABLE,
+               new JavaBehaviour(this, "getCopyCallback"));
    }
 
    /**
@@ -98,4 +109,10 @@ public class UndeletableAspect implements NodeServicePolicies.BeforeDeleteNodePo
         QName nodeType = nodeService.getType(nodeRef);
         throw new AlfrescoRuntimeException(nodeType.toPrefixString() + " deletion is not allowed. Attempted to delete " + nodeRef);
     }
+
+    @Override
+    public CopyBehaviourCallback getCopyCallback(QName classRef, CopyDetails copyDetails)
+    {
+        return DoNothingCopyBehaviourCallback.getInstance();
+    }
 }

src/test/java/org/alfresco/repo/coci/CheckOutCheckInServiceImplTest.java

@@ -1048,6 +1048,29 @@ public class CheckOutCheckInServiceImplTest extends BaseSpringTest
         }
     }
 
+    public void testCanCheckInWhenOriginalHasUndeletableAspect()
+    {
+        nodeService.addAspect(nodeRef, ContentModel.ASPECT_UNDELETABLE, null);
+        // Pre-condition of test, original must have sys:undeletable
+        assertTrue(nodeService.hasAspect(nodeRef, ContentModel.ASPECT_UNDELETABLE));
+
+        // Check-out nodeRef
+        NodeRef workingCopy = this.cociService.checkout(
+                this.nodeRef,
+                this.rootNodeRef,
+                ContentModel.ASSOC_CHILDREN,
+                QName.createQName("workingCopy"));
+        assertNotNull(workingCopy);
+
+        // Check that the working copy does not have the sys:undeletable aspect
+        assertFalse(nodeService.hasAspect(workingCopy, ContentModel.ASPECT_UNDELETABLE));
+
+        // Check-in: must work despite original having the sys:undeletable aspect (MNT-18546)
+        Map<String, Serializable> versionProperties = new HashMap<String, Serializable>();
+        versionProperties.put(Version.PROP_DESCRIPTION, "This is a test version");
+        cociService.checkin(workingCopy, versionProperties);
+    }
+    
     private NodeRef createFolderWithPermission(NodeRef parent, String username, String permission)
     {
         // Authenticate as system user because the current user should not be node owner