Work around an ecj bug in Elements.getAllMembers(). It incorrectly returns static methods from superinterfaces, even though those aren't inherited. This causes AutoValueTest not to compile with ecj on Java 9+, because the MyMap and MyStringMap classes are wrongly shown to contain the static "of()" method that was added to Map in Java 9. AutoValue then tries to use MyMap.of() to construct a default instance of MyMap.

RELNOTES=Worked around an Eclipse compiler bug where static interface methods are incorrectly shown as being inherited.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=247929781

Author: eamonnmcmanus

value/src/main/java/com/google/auto/value/processor/PropertyBuilderClassifier.java

@@ -356,13 +356,23 @@ private Map<String, ExecutableElement> noArgMethodsOf(TypeElement type) {
     // with the same name.
     Map<String, ExecutableElement> methods = new LinkedHashMap<String, ExecutableElement>();
     for (ExecutableElement method : ElementFilter.methodsIn(elementUtils.getAllMembers(type))) {
-      if (method.getParameters().isEmpty()) {
+      if (method.getParameters().isEmpty() && !isStaticInterfaceMethodNotIn(method, type)) {
         methods.put(method.getSimpleName().toString(), method);
       }
     }
     return methods;
   }
 
+  // Work around an Eclipse compiler bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=547185
+  // The result of Elements.getAllMembers includes static methods declared in superinterfaces.
+  // That's wrong because those aren't inherited. So this method checks whether the given method is
+  // a static interface method not in the given type.
+  private static boolean isStaticInterfaceMethodNotIn(ExecutableElement method, TypeElement type) {
+    return method.getModifiers().contains(Modifier.STATIC)
+        && !method.getEnclosingElement().equals(type)
+        && method.getEnclosingElement().getKind().equals(ElementKind.INTERFACE);
+  }
+
   private Optional<ExecutableElement> addAllPutAll(TypeElement barBuilderTypeElement) {
     for (ExecutableElement method :
         MoreElements.getLocalAndInheritedMethods(barBuilderTypeElement, typeUtils, elementUtils)) {