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 org.testng.Assert; 25 import org.testng.annotations.Test; 26 27 import java.lang.reflect.code.OpTransformer; 28 import java.lang.reflect.code.op.CoreOp; 29 import java.lang.reflect.code.Op; 30 import java.lang.reflect.code.bytecode.BytecodeGenerator; 31 import java.lang.invoke.MethodHandle; 32 import java.lang.invoke.MethodHandles; 33 import java.lang.reflect.Method; 34 import java.lang.runtime.CodeReflection; 35 import java.util.Optional; 36 import java.util.stream.Stream; 37 38 /* 39 * @test 40 * @run testng TestArrayCreation 41 */ 42 43 public class TestArrayCreation { 44 @CodeReflection 45 public static String[] f() { 46 return new String[10]; 47 } 48 49 @Test 50 public void testf() throws Throwable { 51 CoreOp.FuncOp f = getFuncOp("f"); 52 53 MethodHandle mh = generate(f); 54 55 Assert.assertEquals((String[]) mh.invoke(), f()); 56 } 57 58 @CodeReflection 59 public static String[][] f2() { 60 return new String[10][]; 61 } 62 63 @Test 64 public void testf2() throws Throwable { 65 CoreOp.FuncOp f = getFuncOp("f2"); 66 67 MethodHandle mh = generate(f); 68 69 Assert.assertEquals((String[][]) mh.invoke(), f2()); 70 } 71 72 @CodeReflection 73 public static String[][] f3() { 74 return new String[10][10]; 75 } 76 77 @Test 78 public void testf3() throws Throwable { 79 CoreOp.FuncOp f = getFuncOp("f3"); 80 81 MethodHandle mh = generate(f); 82 83 Assert.assertEquals((String[][]) mh.invoke(), f3()); 84 } 85 86 @CodeReflection 87 public static String[][] f4() { 88 return new String[][]{{"one", "two"}, {"three"}}; 89 } 90 91 @Test 92 public void testf4() throws Throwable { 93 CoreOp.FuncOp f = getFuncOp("f4"); 94 95 MethodHandle mh = generate(f); 96 97 Assert.assertEquals((String[][]) mh.invoke(), f4()); 98 } 99 100 static MethodHandle generate(CoreOp.FuncOp f) { 101 f.writeTo(System.out); 102 103 CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER); 104 lf.writeTo(System.out); 105 106 return BytecodeGenerator.generate(MethodHandles.lookup(), lf); 107 } 108 109 static CoreOp.FuncOp getFuncOp(String name) { 110 Optional<Method> om = Stream.of(TestArrayCreation.class.getDeclaredMethods()) 111 .filter(m -> m.getName().equals(name)) 112 .findFirst(); 113 114 Method m = om.get(); 115 return m.getCodeModel().get(); 116 } 117 }