| // Copyright 2017 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.android.desugar.testdata.java8; |
| |
| import com.google.common.collect.ImmutableList; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Interfaces with default methods are intialized differently from those without default methods. |
| * When we load such an interface, its static intializer will be executed. |
| * |
| * <p>However, interfaces without default methods are only initialized when their non-primitive |
| * fields are accessed. |
| * |
| * <p>Test data for b/38255926 |
| */ |
| public class DefaultInterfaceMethodWithStaticInitializer { |
| |
| final List<String> initializationOrder = new ArrayList<>(); |
| |
| DefaultInterfaceMethodWithStaticInitializer register(Class<?> enclosingInterfaceClass) { |
| initializationOrder.add(enclosingInterfaceClass.getSimpleName()); |
| return this; |
| } |
| |
| private static long getTime() { |
| return 0; |
| } |
| |
| /** The simplest case: direct implementation. */ |
| public static class TestInterfaceSetOne { |
| |
| /** |
| * A writable field so that other interfaces can set it in their static initializers. |
| * (b/64290760) |
| */ |
| static long writableStaticField; |
| |
| static final DefaultInterfaceMethodWithStaticInitializer RECORDER = |
| new DefaultInterfaceMethodWithStaticInitializer(); |
| |
| /** With a default method, this interface should run clinit. */ |
| interface I1 { |
| long NOW = TestInterfaceSetOne.writableStaticField = getTime(); |
| DefaultInterfaceMethodWithStaticInitializer C = RECORDER.register(I1.class); |
| |
| default int defaultM1() { |
| return 1; |
| } |
| } |
| |
| /** With a default method, this interface should run clinit. */ |
| interface I2 { |
| long NOW = TestInterfaceSetOne.writableStaticField = getTime(); |
| DefaultInterfaceMethodWithStaticInitializer D = RECORDER.register(I2.class); |
| |
| default int defaultM2() { |
| return 10; |
| } |
| } |
| |
| /** Class to trigger the clinit. */ |
| public static class C implements I1, I2 { |
| public int sum() { |
| return defaultM1() + defaultM2(); |
| } |
| } |
| |
| public static ImmutableList<String> getExpectedInitializationOrder() { |
| return ImmutableList.of(I1.class.getSimpleName(), I2.class.getSimpleName()); |
| } |
| |
| public static ImmutableList<String> getRealInitializationOrder() { |
| return ImmutableList.copyOf(RECORDER.initializationOrder); |
| } |
| } |
| |
| /** Test for initializer execution order. */ |
| public static class TestInterfaceSetTwo { |
| |
| static final DefaultInterfaceMethodWithStaticInitializer RECORDER = |
| new DefaultInterfaceMethodWithStaticInitializer(); |
| |
| interface I1 { |
| DefaultInterfaceMethodWithStaticInitializer C = RECORDER.register(I1.class); |
| |
| default int defaultM1() { |
| return 1; |
| } |
| } |
| |
| interface I2 extends I1 { |
| DefaultInterfaceMethodWithStaticInitializer D = RECORDER.register(I2.class); |
| |
| default int defaultM2() { |
| return 2; |
| } |
| } |
| |
| /** |
| * Loading this class will trigger the execution of the static initializers of I2 and I1. |
| * However, I1 will be loaded first, as I2 extends I1. |
| */ |
| public static class C implements I2, I1 { |
| protected static final Integer INT_VALUE = Integer.valueOf(1); // To create a <clinit> |
| |
| public int sum() { |
| return defaultM1() + defaultM2(); |
| } |
| } |
| |
| public static ImmutableList<String> getExpectedInitializationOrder() { |
| return ImmutableList.of(I1.class.getSimpleName(), I2.class.getSimpleName()); |
| } |
| |
| public static ImmutableList<String> getRealInitializationOrder() { |
| return ImmutableList.copyOf(RECORDER.initializationOrder); |
| } |
| } |
| |
| /** Test: I2's <clinit> should not be executed. */ |
| public static class TestInterfaceSetThree { |
| static final DefaultInterfaceMethodWithStaticInitializer RECORDER = |
| new DefaultInterfaceMethodWithStaticInitializer(); |
| |
| interface I1 { |
| DefaultInterfaceMethodWithStaticInitializer C = RECORDER.register(I1.class); |
| |
| default int defaultM1() { |
| return 6; |
| } |
| } |
| |
| interface I2 extends I1 { |
| default int defaultM2() { |
| return 5; |
| } |
| } |
| |
| /** |
| * Loading this class will trigger the execution of the static initializers of I1. I2's will not |
| * execute. |
| */ |
| public static class C implements I2, I1 { |
| protected static final Integer INT_VALUE = Integer.valueOf(1); // To create a <clinit> |
| |
| public int sum() { |
| return defaultM1() + defaultM2(); |
| } |
| } |
| |
| public static ImmutableList<String> getExpectedInitializationOrder() { |
| return ImmutableList.of(I1.class.getSimpleName()); |
| } |
| |
| public static ImmutableList<String> getRealInitializationOrder() { |
| return ImmutableList.copyOf(RECORDER.initializationOrder); |
| } |
| } |
| } |