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 /* 25 * @test 26 * @run testng TestStream 27 */ 28 29 import org.testng.Assert; 30 import org.testng.annotations.Test; 31 32 import java.lang.reflect.code.OpTransformer; 33 import java.lang.reflect.code.op.CoreOp; 34 import java.lang.reflect.code.Op; 35 import java.lang.reflect.code.interpreter.Interpreter; 36 import java.util.ArrayList; 37 import java.util.List; 38 import java.util.stream.Stream; 39 40 import static java.lang.reflect.code.type.JavaType.type; 41 42 public class TestStream { 43 44 @Test 45 public void testMapFilterForEach() { 46 CoreOp.FuncOp f = StreamFuser.fromList(type(Integer.class)) 47 .map((Integer i) -> i.toString()) 48 .filter((String s) -> s.length() < 10) 49 .map((String s) -> s.concat("_XXX")) 50 .filter((String s) -> s.length() < 10) 51 .forEach((String s) -> System.out.println(s)); 52 53 f.writeTo(System.out); 54 55 CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER); 56 57 lf.writeTo(System.out); 58 59 Interpreter.invoke(lf, List.of(List.of(1, 2, 3, 4, 5, 100_000_000, 10_000, 100_000, 20))); 60 } 61 62 @Test 63 public void testMapFlatMapFilterCollect() { 64 CoreOp.FuncOp f = StreamFuser.fromList(type(Integer.class)) 65 .map((Integer i) -> i.toString()) 66 .flatMap((String s) -> List.of(s, s)) 67 .filter((String s) -> s.length() < 10) 68 .map((String s) -> s.concat("_XXX")) 69 .filter((String s) -> s.length() < 10) 70 .collect(() -> new ArrayList<String>(), (List<String> l, String e) -> l.add(e)); 71 72 f.writeTo(System.out); 73 74 CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER); 75 76 lf.writeTo(System.out); 77 78 List<Integer> source = List.of(1, 2, 3, 4, 5, 100_000_000, 10_000, 20); 79 80 List<String> expected = source.stream() 81 .map(Object::toString) 82 .flatMap(s -> Stream.of(s, s)) 83 .filter(s -> s.length() < 10) 84 .map(s -> s.concat("_XXX")) 85 .filter(s -> s.length() < 10) 86 .toList(); 87 88 @SuppressWarnings("unchecked") 89 List<String> actual = (List<String>) Interpreter.invoke(lf, List.of(source)); 90 91 Assert.assertEquals(expected, actual); 92 } 93 }