| /* |
| * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8003280 |
| * @summary Add lambda tests |
| * SAM types and method type inference |
| * @author Brian Goetz |
| * @author Maurizio Cimadamore |
| * @run main LambdaConv03 |
| */ |
| |
| public class LambdaConv03 { |
| |
| static int assertionCount = 0; |
| |
| static void assertTrue(boolean cond) { |
| assertionCount++; |
| if (!cond) |
| throw new AssertionError(); |
| } |
| |
| interface TU<T, U> { |
| public T foo(U u); |
| } |
| |
| public static <T, U> T exec(TU<T, U> lambda, U x) { |
| return lambda.foo(x); |
| } |
| |
| static { |
| //Covariant returns: |
| int i1 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i1); |
| //Method resolution with boxing: |
| int i2 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i2); |
| //Runtime exception transparency: |
| try { |
| exec((Object x) -> { return x.hashCode(); }, null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| { |
| //Covariant returns: |
| int i1 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i1); |
| //Method resolution with boxing: |
| int i2 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i2); |
| //Runtime exception transparency: |
| try { |
| exec((Object x) -> { return x.hashCode(); }, null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| public static void test1() { |
| //Covariant returns: |
| int i1 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i1); |
| //Method resolution with boxing: |
| int i2 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i2); |
| //Runtime exception transparency: |
| try { |
| exec((Object x) -> { return x.hashCode(); }, null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| public void test2() { |
| //Covariant returns: |
| int i1 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i1); |
| //Method resolution with boxing: |
| int i2 = exec((Integer x) -> { return x; }, 3); |
| assertTrue(3 == i2); |
| //Runtime exception transparency: |
| try { |
| exec((Object x) -> { return x.hashCode(); }, null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| public static void main(String[] args) { |
| test1(); |
| new LambdaConv03().test2(); |
| assertTrue(assertionCount == 12); |
| } |
| } |