Index: model/org/eclipse/jdt/internal/core/DeltaProcessor.java
===================================================================
RCS file: /data/cvs/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/DeltaProcessor.java,v
retrieving revision 1.241
diff -u -r1.241 DeltaProcessor.java
--- model/org/eclipse/jdt/internal/core/DeltaProcessor.java	28 May 2004 15:32:55 -0000	1.241
+++ model/org/eclipse/jdt/internal/core/DeltaProcessor.java	4 Jun 2004 08:31:58 -0000
@@ -2307,14 +2307,23 @@
 						}
 						if (res.isOpen()) {
 							if (JavaProject.hasJavaNature(res)) {
-								elementAdded(element, delta, rootInfo);
+								addToParentInfo(element);
+								currentDelta().opened(element);
+								this.state.updateRoots(element.getPath(), delta, this);
+								
+								// refresh pkg fragment roots and caches of the project (and its dependents)
+								this.rootsToRefresh.add(element);
+								this.projectCachesToReset.add(element);
+								
 								this.manager.indexManager.indexAll(res);
 							}
 						} else {
 							JavaModel javaModel = this.manager.getJavaModel();
 							boolean wasJavaProject = javaModel.findJavaProject(res) != null;
 							if (wasJavaProject) {
-								elementRemoved(element, delta, rootInfo);
+								close(element);
+								removeFromParentInfo(element);
+								currentDelta().closed(element);
 								this.manager.indexManager.discardJobs(element.getElementName());
 								this.manager.indexManager.removeIndexFamily(res.getFullPath());
 							}
Index: model/org/eclipse/jdt/internal/core/JavaElementDelta.java
===================================================================
RCS file: /data/cvs/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaElementDelta.java,v
retrieving revision 1.43
diff -u -r1.43 JavaElementDelta.java
--- model/org/eclipse/jdt/internal/core/JavaElementDelta.java	27 May 2004 14:41:39 -0000	1.43
+++ model/org/eclipse/jdt/internal/core/JavaElementDelta.java	4 Jun 2004 08:31:58 -0000
@@ -675,6 +675,18 @@
 		buffer.append("PRIMARY RESOURCE"); //$NON-NLS-1$
 		prev = true;
 	}
+	if ((flags & IJavaElementDelta.F_OPENED) != 0) {
+		if (prev)
+			buffer.append(" | "); //$NON-NLS-1$
+		buffer.append("OPENED"); //$NON-NLS-1$
+		prev = true;
+	}
+	if ((flags & IJavaElementDelta.F_CLOSED) != 0) {
+		if (prev)
+			buffer.append(" | "); //$NON-NLS-1$
+		buffer.append("CLOSED"); //$NON-NLS-1$
+		prev = true;
+	}
 	return prev;
 }
 /** 
Index: model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java
===================================================================
RCS file: /data/cvs/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java,v
retrieving revision 1.83
diff -u -r1.83 TypeHierarchy.java
--- model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java	27 May 2004 14:41:39 -0000	1.83
+++ model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java	4 Jun 2004 08:31:58 -0000
@@ -860,7 +860,15 @@
  * Returns true if the given java project delta could affect this type hierarchy
  */
 private boolean isAffectedByJavaProject(IJavaElementDelta delta, IJavaElement element) {
-	switch (delta.getKind()) {
+    int kind = delta.getKind();
+    int flags = delta.getFlags();
+    if ((flags & IJavaElementDelta.F_OPENED) != 0) {
+        kind = IJavaElementDelta.ADDED; // affected in the same way
+    }
+    if ((flags & IJavaElementDelta.F_CLOSED) != 0) {
+        kind = IJavaElementDelta.REMOVED; // affected in the same way
+    }
+	switch (kind) {
 		case IJavaElementDelta.ADDED :
 			try {
 				// if the added project is on the classpath, then the hierarchy has changed