Bug 66234 [projection] Revert file sometimes does not display the imports
I was able to recreate the scenario, I have a Java file in a Java project as /* * Created on Jun 8, 2004 * * TODO To change the template for this generated file go to * Window - Preferences - Java - Code Style - Code Templates */ package com; import java.net.URL; import java.util.Date; /** * @author admin * * TODO To change the template for this generated type comment go to * Window - Preferences - Java - Code Style - Code Templates */ public class Test { Date xyz; URL abc; } I open it in the editor, delete the keyword 'package' so that that line only says com. Now I right click on file and select 'Revert File'. Notice that the imports list disappears. This is in M9.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/folding/DefaultJavaFoldingStructureProvider.java
if (fEditor instanceof JavaEditor) {
			initialize();
			fElementListener= new ElementChangedListener();
			JavaCore.addElementChangedListener(fElementListener);
		}
	}
	
	/*
	 * @see org.eclipse.jface.text.source.projection.IProjectionListener#projectionDisabled()
	 */
	public void projectionDisabled() {
		fCachedDocument= null;
		if (fElementListener != null) {
			JavaCore.removeElementChangedListener(fElementListener);
			fElementListener= null;
		}
	}
		
	public void initialize() {
		
		if (!isInstalled())
			return;
		
		initializePreferences();
		
		try {
			
			IDocumentProvider provider= fEditor.getDocumentProvider();
			fCachedDocument= provider.getDocument(fEditor.getEditorInput());
			fAllowCollapsing= true;