| /* |
| * Copyright (c) 2014, 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 8035776 |
| * @summary metafactory should fail if impl return does not match sam/bridge returns |
| */ |
| import java.lang.invoke.*; |
| import java.util.Arrays; |
| import static java.lang.invoke.MethodType.methodType; |
| |
| public class MetafactorySamReturnTest { |
| |
| static final MethodHandles.Lookup lookup = MethodHandles.lookup(); |
| |
| public interface I {} |
| |
| public static class C { |
| public static void m_void(String arg) {} |
| public static boolean m_boolean(String arg) { return true; } |
| public static char m_char(String arg) { return 'x'; } |
| public static byte m_byte(String arg) { return 12; } |
| public static short m_short(String arg) { return 12; } |
| public static int m_int(String arg) { return 12; } |
| public static long m_long(String arg) { return 12; } |
| public static float m_float(String arg) { return 12; } |
| public static double m_double(String arg) { return 12; } |
| public static String m_String(String arg) { return ""; } |
| public static Integer m_Integer(String arg) { return 23; } |
| public static Object m_Object(String arg) { return new Object(); } |
| |
| public static MethodHandle getMH(Class<?> c) { |
| try { |
| return lookup.findStatic(C.class, "m_" + c.getSimpleName(), methodType(c, String.class)); |
| } |
| catch (NoSuchMethodException | IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| public static void main(String... args) { |
| Class<?>[] t = { void.class, boolean.class, char.class, |
| byte.class, short.class, int.class, long.class, float.class, double.class, |
| String.class, Integer.class, Object.class }; |
| |
| for (int i = 0; i < t.length; i++) { |
| MethodHandle mh = C.getMH(t[i]); |
| for (int j = 0; j < t.length; j++) { |
| // TEMPORARY EXCEPTIONS |
| if (t[j] == void.class) continue; |
| if (t[i].isPrimitive() && t[j] == Object.class) continue; |
| if (t[i] == char.class && (t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue; |
| if (t[i] == byte.class && (t[j] == short.class || t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue; |
| if (t[i] == short.class && (t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue; |
| if (t[i] == int.class && (t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue; |
| if (t[i] == long.class && (t[j] == float.class || t[j] == double.class)) continue; |
| if (t[i] == float.class && t[j] == double.class) continue; |
| if (t[i] == int.class && t[j] == Integer.class) continue; |
| if (t[i] == Integer.class && (t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue; |
| // END TEMPORARY EXCEPTIONS |
| boolean correct = (t[i].isPrimitive() || t[j].isPrimitive()) |
| ? t[i] == t[j] |
| : t[j].isAssignableFrom(t[i]); |
| MethodType mti = methodType(t[i], String.class); |
| MethodType mtiCS = methodType(t[i], CharSequence.class); |
| MethodType mtj = methodType(t[j], String.class); |
| MethodType mtjObj = methodType(t[j], Object.class); |
| test(correct, mh, mti, mtj); |
| testBridge(correct, mh, mti, mti, mtjObj); |
| testBridge(correct, mh, mti, mti, mtiCS, mtjObj); |
| } |
| } |
| } |
| |
| static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) { |
| tryMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT); |
| tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT); |
| } |
| |
| static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { |
| tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT, bridgeMTs); |
| } |
| |
| static void tryMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, |
| MethodType instMT, MethodType samMT) { |
| try { |
| LambdaMetafactory.metafactory(lookup, "run", methodType(I.class, captured), |
| samMT, mh, instMT); |
| if (!correct) { |
| throw new AssertionError("Uncaught linkage error:" + |
| " impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT); |
| } |
| } |
| catch (LambdaConversionException e) { |
| if (correct) { |
| throw new AssertionError("Unexpected linkage error:" + |
| " e=" + e + |
| ", impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT); |
| } |
| } |
| } |
| |
| static void tryAltMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, |
| MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { |
| boolean bridge = bridgeMTs.length > 0; |
| Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4]; |
| args[0] = samMT; |
| args[1] = mh; |
| args[2] = instMT; |
| args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0; |
| if (bridge) { |
| args[4] = bridgeMTs.length; |
| for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i]; |
| } |
| try { |
| LambdaMetafactory.altMetafactory(lookup, "run", methodType(I.class, captured), args); |
| if (!correct) { |
| throw new AssertionError("Uncaught linkage error:" + |
| " impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT + |
| ", bridges=" + Arrays.toString(bridgeMTs)); |
| } |
| } |
| catch (LambdaConversionException e) { |
| if (correct) { |
| throw new AssertionError("Unexpected linkage error:" + |
| " e=" + e + |
| ", impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT + |
| ", bridges=" + Arrays.toString(bridgeMTs)); |
| } |
| } |
| } |
| |
| } |