Revert "revert changes in RefreshLocalVisitor"

This reverts commit 241da21.

resources/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/localstore/RefreshLocalVisitor.java

@@ -14,6 +14,7 @@
  *******************************************************************************/
 package org.eclipse.core.internal.localstore;
 
+import org.eclipse.core.filesystem.ZipFileUtil;
 import org.eclipse.core.internal.resources.Container;
 import org.eclipse.core.internal.resources.File;
 import org.eclipse.core.internal.resources.Folder;
@@ -247,7 +248,10 @@ protected boolean synchronizeGender(UnifiedTreeNode node, Resource target) throw
 				return false;
 			}
 		} else {
-			if (!node.isFolder()) {
+			// if the target is an open zip file (linked folder), gender should not be
+			// synchronized because the folder state is needed to access the zip file
+			// content.
+			if (!node.isFolder() && !ZipFileUtil.isInsideOpenZipFile(target.getStore())) {
 				folderToFile(node, target);
 				resourceChanged = true;
 				return false;
@@ -294,7 +298,12 @@ public boolean visit(UnifiedTreeNode node) throws CoreException {
 						return true;
 				}
 			} else {
-				if (node.existsInFileSystem() && !IPath.EMPTY.isValidSegment(node.getLocalName())) {
+				// if opened zip files contain directories with content, the local name of the
+				// node contains "/" characters which are needed to properly present the
+				// contents in the workspace. So this check should not be done when handling zip
+				// files.
+				if (node.existsInFileSystem() && !IPath.EMPTY.isValidSegment(node.getLocalName())
+						&& !ZipFileUtil.isInsideOpenZipFile(target.getStore())) {
 					String message = NLS.bind(Messages.resources_invalidResourceName, node.getLocalName());
 					errors.merge(new ResourceStatus(IResourceStatus.INVALID_RESOURCE_NAME, message));
 					return false;