test/tools/javac/lambda/LambdaCapture04.java

Tue, 14 May 2013 11:11:09 -0700

author
rfield
date
Tue, 14 May 2013 11:11:09 -0700
changeset 1752
c09b7234cded
parent 0
959103a6100f
permissions
-rw-r--r--

8012556: Implement lambda methods on interfaces as static
8006140: Javac NPE compiling Lambda expression on initialization expression of static field in interface
Summary: Lambdas occurring in static contexts or those not needing instance information should be generated into static methods. This has long been the case for classes. However, as a work-around to the lack of support for statics on interfaces, interface lambda methods have been generated into default methods. For lambdas in interface static contexts (fields and static methods) this causes an NPE in javac because there is no 'this'. MethodHandles now support static methods on interfaces. This changeset allows lambda methods to be generated as static interface methods. An existing bug in Hotspot (8013875) is exposed in a test when the "-esa" flag is used. This test and another test that already exposed this bug have been marked with @ignore.
Reviewed-by: mcimadamore

aoqi@0 1 /*
aoqi@0 2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0 4 *
aoqi@0 5 * This code is free software; you can redistribute it and/or modify it
aoqi@0 6 * under the terms of the GNU General Public License version 2 only, as
aoqi@0 7 * published by the Free Software Foundation.
aoqi@0 8 *
aoqi@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0 12 * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0 13 * accompanied this code).
aoqi@0 14 *
aoqi@0 15 * You should have received a copy of the GNU General Public License version
aoqi@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0 18 *
aoqi@0 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0 20 * or visit www.oracle.com if you need additional information or have any
aoqi@0 21 * questions.
aoqi@0 22 */
aoqi@0 23
aoqi@0 24 /*
aoqi@0 25 * @test
aoqi@0 26 * @bug 8003280
aoqi@0 27 * @summary Add lambda tests
aoqi@0 28 * test for capture of non-mutable locals/outer fields in multiple scopes
aoqi@0 29 * @author Maurizio Cimadamore
aoqi@0 30 * @run main LambdaCapture04
aoqi@0 31 */
aoqi@0 32
aoqi@0 33 public class LambdaCapture04 {
aoqi@0 34
aoqi@0 35 static int assertionCount = 0;
aoqi@0 36
aoqi@0 37 static void assertTrue(boolean cond) {
aoqi@0 38 assertionCount++;
aoqi@0 39 if (!cond)
aoqi@0 40 throw new AssertionError();
aoqi@0 41 }
aoqi@0 42
aoqi@0 43 interface Tester {
aoqi@0 44 void test();
aoqi@0 45 }
aoqi@0 46
aoqi@0 47 interface TU<U> {
aoqi@0 48 public void foo(U u);
aoqi@0 49 }
aoqi@0 50
aoqi@0 51 public static <U> void exec(TU<U> lambda, U x) {
aoqi@0 52 lambda.foo(x);
aoqi@0 53 }
aoqi@0 54
aoqi@0 55 Integer n1 = 10;
aoqi@0 56
aoqi@0 57 void test1() {
aoqi@0 58 final Integer N1 = 1;
aoqi@0 59 class A {
aoqi@0 60 Integer n2 = 20;
aoqi@0 61 void test() {
aoqi@0 62 final Integer N2 = 2;
aoqi@0 63 class B {
aoqi@0 64 void test() {
aoqi@0 65 final Integer N3 = 3;
aoqi@0 66 exec((final Integer x) -> new Tester() { public void test() { assertTrue(x + n1 + n2 + N1 + N2 + N3 == 66); } }.test(),30);
aoqi@0 67 }
aoqi@0 68 }
aoqi@0 69 new B().test();
aoqi@0 70 }
aoqi@0 71 }
aoqi@0 72 new A().test();
aoqi@0 73 }
aoqi@0 74
aoqi@0 75 void test2() {
aoqi@0 76 final Integer N1 = 1;
aoqi@0 77 class A {
aoqi@0 78 Integer n2 = 20;
aoqi@0 79 void test() {
aoqi@0 80 final Integer N2 = 2;
aoqi@0 81 class B {
aoqi@0 82 void test() {
aoqi@0 83 final Integer N3 = 3;
aoqi@0 84 exec((final Integer x) -> {
aoqi@0 85 class LocTester implements Tester {
aoqi@0 86 public void test() { assertTrue(x + n1 + n2 + N1 + N2 + N3 == 66); }
aoqi@0 87 };
aoqi@0 88 new LocTester().test();
aoqi@0 89 },30);
aoqi@0 90 }
aoqi@0 91 }
aoqi@0 92 new B().test();
aoqi@0 93 }
aoqi@0 94 }
aoqi@0 95 new A().test();
aoqi@0 96 }
aoqi@0 97
aoqi@0 98 void test3() {
aoqi@0 99 final Integer N1 = 1;
aoqi@0 100 new Tester() {
aoqi@0 101 Integer n2 = 20;
aoqi@0 102 public void test() {
aoqi@0 103 final Integer N2 = 2;
aoqi@0 104 new Tester() {
aoqi@0 105 public void test() {
aoqi@0 106 final Integer N3 = 3;
aoqi@0 107 exec((final Integer x) -> new Tester() { public void test() { assertTrue(x + n1 + n2 + N1 + N2 + N3 == 66); } }.test(),30);
aoqi@0 108 }
aoqi@0 109 }.test();
aoqi@0 110 }
aoqi@0 111 }.test();
aoqi@0 112 }
aoqi@0 113
aoqi@0 114 void test4() {
aoqi@0 115 final Integer N1 = 1;
aoqi@0 116 new Tester() {
aoqi@0 117 Integer n2 = 20;
aoqi@0 118 public void test() {
aoqi@0 119 final Integer N2 = 2;
aoqi@0 120 new Tester() {
aoqi@0 121 public void test() {
aoqi@0 122 final Integer N3 = 3;
aoqi@0 123 exec((final Integer x) -> {
aoqi@0 124 class LocTester implements Tester {
aoqi@0 125 public void test() { assertTrue(x + n1 + n2 + N1 + N2 + N3 == 66); }
aoqi@0 126 };
aoqi@0 127 new LocTester().test();
aoqi@0 128 },30);
aoqi@0 129 }
aoqi@0 130 }.test();
aoqi@0 131 }
aoqi@0 132 }.test();
aoqi@0 133 }
aoqi@0 134
aoqi@0 135 public static void main(String[] args) {
aoqi@0 136 LambdaCapture04 t = new LambdaCapture04();
aoqi@0 137 t.test1();
aoqi@0 138 t.test2();
aoqi@0 139 t.test3();
aoqi@0 140 t.test4();
aoqi@0 141 assertTrue(assertionCount == 4);
aoqi@0 142 }
aoqi@0 143 }

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