1 /*
  2  * Copyright (c) 2024, 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 import jdk.incubator.code.Reflect;
 25 import jdk.incubator.code.Op;
 26 import jdk.incubator.code.dialect.core.CoreOp;
 27 import jdk.incubator.code.interpreter.Interpreter;
 28 import org.junit.jupiter.api.Assertions;
 29 import org.junit.jupiter.params.ParameterizedTest;
 30 import org.junit.jupiter.params.provider.MethodSource;
 31 
 32 import java.lang.invoke.MethodHandles;
 33 import java.lang.reflect.InvocationTargetException;
 34 import java.lang.reflect.Method;
 35 import java.util.List;
 36 
 37 /*
 38  * @test
 39  * @modules jdk.incubator.code
 40  * @run junit TestOverloads
 41  * @run main Unreflect TestOverloads
 42  * @run junit TestOverloads
 43  */
 44 
 45 public class TestOverloads {
 46 
 47     @Reflect
 48     static int f() {
 49        return 0;
 50     }
 51 
 52     @Reflect
 53     static int f(int i) {
 54        return 1;
 55     }
 56 
 57     @Reflect
 58     static int f(Integer i) {
 59        return 2;
 60     }
 61 
 62     @Reflect
 63     static int f(Object o) {
 64        return 3;
 65     }
 66 
 67     @Reflect
 68     static int f(List<Integer> l) {
 69        return 4;
 70     }
 71 
 72     @Reflect
 73     static int f(List<Integer> l, Object o) {
 74        return 5;
 75     }
 76 
 77     public static Object[][]  testData() {
 78         return new Object[][]{
 79             new Object[] {new Class[]{}, new Object[]{}},
 80             new Object[] {new Class[]{int.class}, new Object[]{-1}},
 81             new Object[] {new Class[]{Integer.class}, new Object[]{-1}},
 82             new Object[] {new Class[]{Object.class}, new Object[]{"hello"}},
 83             new Object[] {new Class[]{List.class}, new Object[]{List.of()}},
 84             new Object[] {new Class[]{List.class, Object.class}, new Object[]{List.of(), -1}}
 85         };
 86     }
 87 
 88     @ParameterizedTest
 89     @MethodSource("testData")
 90     public static void testOverloads(Class<?>[] paramTypes, Object[] params) {
 91         try {
 92             Class<TestOverloads> clazz = TestOverloads.class;
 93             Method method = clazz.getDeclaredMethod("f", paramTypes);
 94             CoreOp.FuncOp f = Op.ofMethod(method).orElseThrow();
 95             var res1 = Interpreter.invoke(MethodHandles.lookup(), f, params);
 96             var res2 = method.invoke(null, params);
 97 
 98             Assertions.assertEquals(res2, res1);
 99 
100         } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
101             throw new RuntimeException(e);
102         }
103     }
104 }