A noextend API class that implements noimplement interface isn't a leak

#1064

apitools/org.eclipse.pde.api.tools.tests/src/org/eclipse/pde/api/tools/builder/tests/leak/ClassImplementsLeak.java

@@ -340,5 +340,20 @@ private void x12(boolean inc) {
 		deployLeakTest(typename + ".java", inc); //$NON-NLS-1$
 	}
 
+	/**
+	 * Tests that an noextend API class that implements noimplement interface
+	 * is not a leak
+	 */
+	public void testNoExtendClassImplementsNoImplementInterface13F() {
+		x13(false);
+	}
 
+	public void testNoExtendClassImplementsNoImplementInterface13I() {
+		x13(true);
+	}
+
+	private void x13(boolean inc) {
+		String typename = "test37"; //$NON-NLS-1$
+		deployLeakTest(typename + ".java", inc); //$NON-NLS-1$
+	}
 }

apitools/org.eclipse.pde.api.tools.tests/test-builder/leak/class/test37.java

@@ -0,0 +1,24 @@
+/*******************************************************************************
+ * Copyright (c) 2017 IBM Corporation and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package x.y.z;
+
+import x.y.z.interfaceNoImplement;
+
+/**
+* @noextend
+*/
+public class test37 implements interfaceNoImplement {
+	public void exposeMethod() {}
+}
+

apitools/org.eclipse.pde.api.tools/src/org/eclipse/pde/api/tools/internal/builder/LeakImplementsProblemDetector.java

@@ -64,7 +64,9 @@ public boolean isProblem(IReference reference, IProgressMonitor monitor) {
 				if (annotations != null) {
 					if (RestrictionModifiers.isImplementRestriction(annotations.getRestrictions())) {
 						IApiAnnotations annotationsSource = member.getApiComponent().getApiDescription().resolveAnnotations(sourceMember.getHandle());
-						if (annotationsSource != null && !RestrictionModifiers.isImplementRestriction(annotationsSource.getRestrictions())) {
+						if (annotationsSource != null
+								&& !RestrictionModifiers.isImplementRestriction(annotationsSource.getRestrictions())
+								&& !RestrictionModifiers.isExtendRestriction(annotationsSource.getRestrictions())) {
 							isProb= true;
 						}
 					}