1 /* 2 * Copyright (c) 2019, 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 package jdk.jpackage.test; 24 25 import java.lang.reflect.InvocationTargetException; 26 import java.util.function.*; 27 28 29 public class Functional { 30 @FunctionalInterface 31 public interface ThrowingConsumer<T> { 32 void accept(T t) throws Throwable; 33 34 public static <T> Consumer<T> toConsumer(ThrowingConsumer<T> v) { 35 return o -> { 36 try { 37 v.accept(o); 38 } catch (Throwable ex) { 39 rethrowUnchecked(ex); 40 } 41 }; 42 } 43 } 44 45 @FunctionalInterface 46 public interface ThrowingBiConsumer<T, U> { 47 void accept(T t, U u) throws Throwable; 48 49 public static <T, U> BiConsumer<T, U> toBiConsumer(ThrowingBiConsumer<T, U> v) { 50 return (t, u) -> { 51 try { 52 v.accept(t, u); 53 } catch (Throwable ex) { 54 rethrowUnchecked(ex); 55 } 56 }; 57 } 58 } 59 60 @FunctionalInterface 61 public interface ThrowingSupplier<T> { 62 T get() throws Throwable; 63 64 public static <T> Supplier<T> toSupplier(ThrowingSupplier<T> v) { 65 return () -> { 66 try { 67 return v.get(); 68 } catch (Throwable ex) { 69 rethrowUnchecked(ex); 70 } 71 // Unreachable 72 return null; 73 }; 74 } 75 } 76 77 @FunctionalInterface 78 public interface ThrowingFunction<T, R> { 79 R apply(T t) throws Throwable; 80 81 public static <T, R> Function<T, R> toFunction(ThrowingFunction<T, R> v) { 82 return (t) -> { 83 try { 84 return v.apply(t); 85 } catch (Throwable ex) { 86 rethrowUnchecked(ex); 87 } 88 // Unreachable 89 return null; 90 }; 91 } 92 } 93 94 @FunctionalInterface 95 public interface ThrowingRunnable { 96 void run() throws Throwable; 97 98 public static Runnable toRunnable(ThrowingRunnable v) { 99 return () -> { 100 try { 101 v.run(); 102 } catch (Throwable ex) { 103 rethrowUnchecked(ex); 104 } 105 }; 106 } 107 } 108 109 public static <T> Supplier<T> identity(Supplier<T> v) { 110 return v; 111 } 112 113 public static <T> Consumer<T> identity(Consumer<T> v) { 114 return v; 115 } 116 117 public static <T, U> BiConsumer<T, U> identity(BiConsumer<T, U> v) { 118 return v; 119 } 120 121 public static Runnable identity(Runnable v) { 122 return v; 123 } 124 125 public static <T, R> Function<T, R> identity(Function<T, R> v) { 126 return v; 127 } 128 129 public static <T, R> Function<T, R> identityFunction(Function<T, R> v) { 130 return v; 131 } 132 133 public static <T> Predicate<T> identity(Predicate<T> v) { 134 return v; 135 } 136 137 public static <T> Predicate<T> identityPredicate(Predicate<T> v) { 138 return v; 139 } 140 141 public static class ExceptionBox extends RuntimeException { 142 public ExceptionBox(Throwable throwable) { 143 super(throwable); 144 } 145 } 146 147 @SuppressWarnings("unchecked") 148 public static void rethrowUnchecked(Throwable throwable) throws ExceptionBox { 149 if (throwable instanceof ExceptionBox) { 150 throw (ExceptionBox)throwable; 151 } 152 153 if (throwable instanceof InvocationTargetException) { 154 new ExceptionBox(throwable.getCause()); 155 } 156 157 throw new ExceptionBox(throwable); 158 } 159 }