Bug 30681 Refresh problem in Package Explorer view
20030129 integration build Refreshing a project without a Java nature in a Package Explorer produces message:" Problem occured refreshing the selected resources. Reason: org.eclipse.releng does not exist." Log contains: !ENTRY org.eclipse.jdt.ui 4 10001 Jan 30, 2003 23:45:54.937 !MESSAGE Internal Error !STACK 1 Java Model Exception: Java Model Status [org.eclipse.releng does not exist.] at org.eclipse.jdt.internal.core.JavaElement.newNotPresentException (JavaElement.java:488) at org.eclipse.jdt.internal.core.JavaModelManager.getPerProjectInfoCheckExistence (JavaModelManager.java:948) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath (JavaProject.java:1335) at org.eclipse.jdt.internal.core.DeltaProcessor.checkExternalArchiveChanges (DeltaProcessor.java(Compiled Code)) at org.eclipse.jdt.internal.core.DeltaProcessor.checkExternalArchiveChanges (DeltaProcessor.java(Compiled Code)) at org.eclipse.jdt.internal.core.JavaModel.refreshExternalArchives (JavaModel.java:445) at org.eclipse.jdt.ui.actions.RefreshAction$1.run (RefreshAction.java:120) at org.eclipse.jdt.internal.core.BatchOperation.executeOperation (BatchOperation.java:34) at org.eclipse.jdt.internal.core.JavaModelOperation.execute (JavaModelOperation.java:337) at org.eclipse.jdt.internal.core.JavaModelOperation.run (JavaModelOperation.java:665) at org.eclipse.core.internal.resources.Workspace.run (Workspace.java:1580) at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:2607) at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run (WorkbenchRunnableAdapter.java:32) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run (ModalContext.java:95) !ENTRY org.eclipse.jdt.core 4 969 Jan 30, 2003 23:45:54.997 !MESSAGE org.eclipse.releng does not exist.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/RefreshAction.java
WorkbenchHelp.setHelp(this, IJavaHelpContextIds.REFRESH_ACTION);
	}
	
	/* (non-Javadoc)
	 * Method declared in SelectionDispatchAction
	 */
	protected void selectionChanged(IStructuredSelection selection) {
		setEnabled(checkEnabled(selection));
	}
	private boolean checkEnabled(IStructuredSelection selection) {
		if (selection.isEmpty())
			return true;
		for (Iterator iter= selection.iterator(); iter.hasNext();) {
			Object element= (Object) iter.next();
			if (element instanceof IAdaptable) {
				IResource resource= (IResource)((IAdaptable)element).getAdapter(IResource.class);
				if (resource == null)
					return false;
			} else {
				return false;
			}
		}
		return true;
	}
	/* (non-Javadoc)
	 * Method declared in SelectionDispatchAction
	 */
	protected void run(IStructuredSelection selection) {
		final IResource[] resources= getResources(selection);
		IWorkspaceRunnable operation= new IWorkspaceRunnable() {