/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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public class Main {
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public static void main(String[] args) {
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System.loadLibrary(args[0]);
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testRegistration1();
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testRegistration2();
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testRegistration3();
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}
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// Test that a subclass' method is registered instead of a superclass' method.
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private static void testRegistration1() {
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registerNatives(TestSub.class);
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expectNotThrows(new TestSub());
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expectThrows(new TestSuper());
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}
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// Test that a superclass' method is registered if the subclass doesn't have a matching method.
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private static void testRegistration2() {
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registerNatives(TestSub2.class);
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expectNotThrows(new TestSub2());
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expectNotThrows(new TestSuper2());
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}
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// Test that registration fails if the subclass has a matching non-native method.
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private static void testRegistration3() {
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try {
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registerNatives(TestSub3.class);
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System.out.println("Expected exception for registerNatives(TestSub3.class)");
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} catch (NoSuchMethodError ignored) {
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}
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}
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private native static int registerNatives(Class<?> c);
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private static void expectThrows(Base b) {
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try {
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b.callMyFoo();
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System.out.println("Expected exception for " + b.getClass().getName());
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} catch (Throwable ignored) {
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}
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}
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private static void expectNotThrows(Base b) {
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try {
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b.callMyFoo();
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} catch (Throwable t) {
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System.out.println("Did not expect an exception for " + b.getClass().getName());
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t.printStackTrace(System.out);
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}
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}
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}
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abstract class Base {
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public abstract void callMyFoo();
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}
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class TestSuper extends Base {
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private native void foo();
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@Override
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public void callMyFoo() {
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foo();
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}
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}
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class TestSub extends TestSuper {
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public native void foo();
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@Override
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public void callMyFoo() {
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foo();
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}
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}
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class TestSuper2 extends Base{
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public native void foo();
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@Override
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public void callMyFoo() {
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foo();
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}
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}
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class TestSub2 extends TestSuper2 {
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}
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class TestSuper3 extends Base {
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public native void foo();
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@Override
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public void callMyFoo() {
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foo();
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}
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}
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class TestSub3 extends TestSuper3 {
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public void foo() {
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System.out.println("TestSub3.foo()");
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}
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}
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