1 /* 2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8044537 8200301 27 * @summary Checking ACC_SYNTHETIC flag is generated for bridge method 28 * generated for lambda expressions and method references. 29 * @modules jdk.compiler/com.sun.tools.javac.api 30 * jdk.compiler/com.sun.tools.javac.main 31 * jdk.jdeps/com.sun.tools.classfile 32 * @library /tools/lib /tools/javac/lib ../lib 33 * @build toolbox.ToolBox InMemoryFileManager TestResult TestBase 34 * @build SyntheticTestDriver ExpectedClass ExpectedClasses 35 * @compile -XDdeduplicateLambdas=false BridgeMethodsForLambdaTest.java 36 * @run main SyntheticTestDriver BridgeMethodsForLambdaTest 37 */ 38 39 import java.util.Comparator; 40 import java.util.stream.IntStream; 41 42 /** 43 * Synthetic members: 44 * 1. inner class for Inner1. 45 * 2. method for () -> {} in Inner1 46 * 3. method for () -> {} in Inner2 47 * 4. method for super::function() 48 * 5. method reference to vararg method. 49 * 6. method reference to array's method. 50 * 7. constructors for Inner1 and Inner2. 51 */ 52 @ExpectedClass(className = "BridgeMethodsForLambdaTest", 53 expectedMethods = {"<init>()", "<clinit>()", "function(java.lang.Integer[])"}, 54 expectedNumberOfSyntheticMethods = 3) 55 @ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner1", 56 expectedMethods = {"<init>(BridgeMethodsForLambdaTest)", "function()", "run()"}, 57 expectedFields = "lambda1", 58 expectedNumberOfSyntheticMethods = 1, 59 expectedNumberOfSyntheticFields = 1) 60 @ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner2", 61 expectedMethods = {"<init>()", "staticFunction()"}, 62 expectedFields = "lambda1", 63 expectedNumberOfSyntheticMethods = 1) 64 @ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner3", 65 expectedMethods = {"<init>(BridgeMethodsForLambdaTest)", "function()"}, 66 expectedNumberOfSyntheticFields = 1) 67 @ExpectedClass(className = "BridgeMethodsForLambdaTest$Inner4", 68 expectedMethods = {"<init>(BridgeMethodsForLambdaTest)", "function()"}, 69 expectedNumberOfSyntheticMethods = 1, 70 expectedNumberOfSyntheticFields = 1) 71 public class BridgeMethodsForLambdaTest { 72 73 private class Inner1 implements Runnable { 74 private Inner1() { 75 } 76 private Runnable lambda1 = () -> { 77 }; 78 private void function() { 79 } 80 @Override 81 public void run() { 82 } 83 } 84 85 private static class Inner2 { 86 private Runnable lambda1 = () -> { 87 }; 88 private static void staticFunction() { 89 } 90 } 91 92 private class Inner3 { 93 public void function() { 94 } 95 } 96 97 private class Inner4 extends Inner3 { 98 @Override 99 public void function() { 100 Runnable r = super::function; 101 } 102 } 103 104 private static int function(Integer...vararg) { 105 return 0; 106 } 107 108 { 109 Inner1 inner = new Inner1(); 110 Runnable l1 = inner::function; 111 Runnable l2 = Inner1::new; 112 inner.lambda1 = inner::function; 113 Comparator<Integer> c = BridgeMethodsForLambdaTest::function; 114 IntStream.of(2).mapToObj(int[]::new); 115 } 116 117 static { 118 Inner2 inner = new Inner2(); 119 Runnable l1 = Inner2::staticFunction; 120 } 121 }