1/* 2 * Copyright (c) 2015, 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 8141508 27 * @summary Test that Call site initialization exception is not thrown when the method 28 reference receiver is of intersection type. 29 * @run main IntersectionTypeReceiverTest 30 */ 31 32import java.time.LocalDate; 33import java.util.EnumSet; 34import java.util.Objects; 35import java.util.Optional; 36import java.util.function.Function; 37import java.util.function.Supplier; 38 39public class IntersectionTypeReceiverTest { 40 41 public static void main(String[] args) { 42 String output = valueOfKey(Size.class, LocalDate.now()).toString(); 43 if (!"Optional[S]".equals(output)) 44 throw new AssertionError("Unexpected output: " + output); 45 } 46 47 enum Size implements Supplier<LocalDate> { 48 S, M, L; 49 50 @Override 51 public LocalDate get() { 52 return LocalDate.now(); 53 } 54 55 } 56 57 public static <K, T extends Enum<T> & Supplier<K>> Optional<T> valueOfKey(Class<T> enumType, K key) { 58 return valueOf(enumType, key, T::get); 59 } 60 61 public static <K, T extends Enum<T>> Optional<T> valueOf(Class<T> enumType, K key, Function<T, K> keyExtractor) { 62 return EnumSet.allOf(enumType).stream().filter(t -> Objects.equals(keyExtractor.apply(t), key)).findFirst(); 63 } 64} 65