### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java,v
retrieving revision 1.107
diff -u -r1.107 TypeHierarchy.java
--- model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java	7 Mar 2009 01:08:09 -0000	1.107
+++ model/org/eclipse/jdt/internal/core/hierarchy/TypeHierarchy.java	14 Sep 2009 07:32:41 -0000
@@ -984,6 +984,9 @@
 protected boolean isAffectedByOpenable(IJavaElementDelta delta, IJavaElement element, int eventType) {
 	if (element instanceof CompilationUnit) {
 		CompilationUnit cu = (CompilationUnit)element;
+		if (delta.getKind() == IJavaElementDelta.ADDED && !cu.isPrimary())	
+			return false;
+		
 		ChangeCollector collector = this.changeCollector;
 		if (collector == null) {
 		    collector = new ChangeCollector(this);
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/TypeHierarchyNotificationTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/TypeHierarchyNotificationTests.java,v
retrieving revision 1.32
diff -u -r1.32 TypeHierarchyNotificationTests.java
--- src/org/eclipse/jdt/core/tests/model/TypeHierarchyNotificationTests.java	28 Apr 2009 17:49:27 -0000	1.32
+++ src/org/eclipse/jdt/core/tests/model/TypeHierarchyNotificationTests.java	14 Sep 2009 07:32:46 -0000
@@ -1244,6 +1244,55 @@
 		h.removeTypeHierarchyChangedListener(this);
 	}
 }
+
+/*
+ * Ensures that getting a non-primary working copy does NOT trigger
+ * a type hierarchy notification for the concerned hierarchy. 
+ * See https://bugs.eclipse.org/bugs/show_bug.cgi?id=275805
+ */
+public void testGetWorkingCopy() throws CoreException {
+	ITypeHierarchy h = null;
+	ICompilationUnit superCopy = null;
+	ICompilationUnit aWorkingCopy = null;
+
+	try {
+		
+		createJavaProject("P");
+		createFolder("/P/p");
+		createFile(
+			"/P/p/IX.java",
+			"package p;\n" +
+			"public interface IX {\n" +
+			"}"
+		);
+		
+		createFile(
+				"/P/p/X.java",
+				"package p;\n" +
+				"public class X implements IX{\n" +
+				"}"
+			);
+
+		superCopy = getCompilationUnit("/P/p/IX.java");
+		superCopy.becomeWorkingCopy(null/*no progress*/);
+		h = superCopy.getType("IX").newTypeHierarchy(null);		
+		h.addTypeHierarchyChangedListener(this);
+		
+		aWorkingCopy = getCompilationUnit("P/p/X.java").getWorkingCopy(null);
+		
+		assertTrue("Should receive NO change", !this.changeReceived);
+	} finally {
+		if (h != null)
+			h.removeTypeHierarchyChangedListener(this);
+		if (aWorkingCopy != null)
+			aWorkingCopy.discardWorkingCopy();
+		if (superCopy!= null)
+			superCopy.discardWorkingCopy();
+		
+		deleteProject("P");
+	}
+}
+
 /**
  * Make a note of the change
  */