### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/hierarchy/HierarchyBuilder.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/hierarchy/HierarchyBuilder.java,v
retrieving revision 1.68
diff -u -r1.68 HierarchyBuilder.java
--- model/org/eclipse/jdt/internal/core/hierarchy/HierarchyBuilder.java	7 Mar 2009 01:08:09 -0000	1.68
+++ model/org/eclipse/jdt/internal/core/hierarchy/HierarchyBuilder.java	18 Nov 2010 08:00:08 -0000
@@ -167,7 +167,8 @@
 				break;
 			case TypeDeclaration.INTERFACE_DECL :
 			case TypeDeclaration.ANNOTATION_TYPE_DECL :
-				this.hierarchy.addInterface(typeHandle);
+				if (this.hierarchy.typeToSuperInterfaces.get(typeHandle) == null)
+					this.hierarchy.addInterface(typeHandle);
 				break;
 		}
 		if (superinterfaceHandles == null) {
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/TypeHierarchyTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/TypeHierarchyTests.java,v
retrieving revision 1.97
diff -u -r1.97 TypeHierarchyTests.java
--- src/org/eclipse/jdt/core/tests/model/TypeHierarchyTests.java	11 May 2010 18:58:15 -0000	1.97
+++ src/org/eclipse/jdt/core/tests/model/TypeHierarchyTests.java	18 Nov 2010 08:00:13 -0000
@@ -2421,4 +2421,101 @@
 		"  <anonymous #1> [in testIt() [in BugTest2Buggy [in BugTest2Buggy.java [in p288698 [in src288698.classbug [in TypeHierarchy]]]]]]\n",
 		hierarchy);
 }
+/**
+ * @bug  329663:[type hierarchy] Interfaces duplicated in type hierarchy on two packages from multiple projects
+ * @test that when two selected regions contains the same interface, it's not reported twice in the hierarchy.
+ * 
+ * @throws JavaModelException
+ * @throws CoreException
+ * @see "https://bugs.eclipse.org/bugs/show_bug.cgi?id=329663"
+ */
+public void testBug329663() throws JavaModelException, CoreException {
+	try {
+		IJavaProject p1 = createJavaProject("P1", new String[] {""}, new String[] {"JCL_LIB"}, new String[0], "");
+		IJavaProject p2 = createJavaProject("P2", new String[] {""}, new String[] {"JCL_LIB"}, new String[] {"/P1"}, "");
+		createFolder("/P1/p");
+		createFile(
+				"/P1/p/I.java",
+				"package p;\n" +
+				"public interface I{}");
+		createFile(
+				"/P1/p/X.java",
+				"package p;\n" +
+				"public class X implements I{\n" +
+				"}"
+		);
+		createFolder("/P2/q");
+		createFile(
+				"/P2/q/Y.java",
+				"package q;\n" +
+				"import p.*;\n" +
+				"public class Y implements I {\n" +
+					"}"
+		);
+		IRegion region = JavaCore.newRegion();
+		region.add(p1);
+		region.add(p2);
+		ITypeHierarchy hierarchy = JavaCore.newTypeHierarchy(region, null, null);
+		IType[] types = hierarchy.getRootInterfaces();
+		assertTypesEqual("Unexpected super interfaces", 
+				"java.io.Serializable\n" + 
+				"p.I\n", 
+				types);
+	}
+	finally{
+		deleteProject("P1");
+		deleteProject("P2");
+	}
+}
+/**
+ * @bug  329663:[type hierarchy] Interfaces duplicated in type hierarchy on two packages from multiple projects
+ * @test that when two selected regions contains interfaces with same name but different, they are reported individually
+ * in the hierarchy.
+ * 
+ * @throws JavaModelException
+ * @throws CoreException
+ * @see "https://bugs.eclipse.org/bugs/show_bug.cgi?id=329663"
+ */
+public void testBug329663a() throws JavaModelException, CoreException {
+try {
+	IJavaProject p1 = createJavaProject("P1", new String[] {""}, new String[] {"JCL_LIB"}, new String[0], "");
+	IJavaProject p2 = createJavaProject("P2", new String[] {""}, new String[] {"JCL_LIB"}, new String[] {"/P1"}, "");
+	createFolder("/P1/p");
+	createFile(
+			"/P1/p/I.java",
+			"package p;\n" +
+			"public interface I{}");
+	createFile(
+			"/P1/p/X.java",
+			"package p;\n" +
+			"public class X implements I{\n" +
+				"}"
+	);
+	createFolder("/P2/q");
+	createFile(
+			"/P2/q/I.java",
+			"package q;\n" +
+			"public interface I{}");
+	createFile(
+			"/P2/q/Y.java",
+			"package q;\n" +
+			"public class Y implements I {\n" +
+				"}"
+	);
+	IRegion region = JavaCore.newRegion();
+	region.add(p1);
+	region.add(p2);
+	ITypeHierarchy hierarchy = JavaCore.newTypeHierarchy(region, null, null);
+	IType[] types = hierarchy.getRootInterfaces();
+	assertTypesEqual("Unexpected super interfaces", 
+			"java.io.Serializable\n" + 
+			"p.I\n" + 
+			"q.I\n", 
+			types);
+}
+finally{
+	deleteProject("P1");
+	deleteProject("P2");
+}
+}
 }