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 TestStreamUsingQuotable
27  */
28 
29 import org.testng.Assert;
30 import org.testng.annotations.Test;
31 
32 import java.lang.reflect.code.Op;
33 import java.lang.reflect.code.OpTransformer;
34 import java.lang.reflect.code.interpreter.Interpreter;
35 import java.lang.reflect.code.op.CoreOp;
36 import java.util.ArrayList;
37 import java.util.List;
38 import java.util.stream.Stream;
39 
40 public class TestStreamUsingQuotable {
41 
42     @Test
43     public void testMapFilterForEach() {
44         CoreOp.FuncOp f = StreamFuserUsingQuotable.fromList(Integer.class)
45                 .map(Object::toString)
46                 .filter(s -> s.length() < 10)
47                 .map(s -> s.concat("_XXX"))
48                 .filter(s -> s.length() < 10)
49                 // Cannot use method reference since it captures the result of the expression "System.out"
50                 .forEach(s -> System.out.println(s));
51 
52         f.writeTo(System.out);
53 
54         CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER);
55 
56         lf.writeTo(System.out);
57 
58         Interpreter.invoke(lf, List.of(List.of(1, 2, 3, 4, 5, 100_000_000, 10_000, 100_000, 20)));
59     }
60 
61     @Test
62     public void testMapFlatMapFilterCollect() {
63         CoreOp.FuncOp f = StreamFuserUsingQuotable.fromList(Integer.class)
64                 .map(Object::toString)
65                 .flatMap(s -> List.of(s, s))
66                 .filter(s -> s.length() < 10)
67                 .map(s -> s.concat("_XXX"))
68                 .filter(s -> s.length() < 10)
69                 .collect(ArrayList::new, ArrayList::add);
70 
71         f.writeTo(System.out);
72 
73         CoreOp.FuncOp lf = f.transform(OpTransformer.LOWERING_TRANSFORMER);
74 
75         lf.writeTo(System.out);
76 
77         List<Integer> source = List.of(1, 2, 3, 4, 5, 100_000_000, 10_000, 20);
78 
79         List<String> expected = source.stream()
80                 .map(Object::toString)
81                 .flatMap(s -> Stream.of(s, s))
82                 .filter(s -> s.length() < 10)
83                 .map(s -> s.concat("_XXX"))
84                 .filter(s -> s.length() < 10)
85                 .toList();
86 
87         @SuppressWarnings("unchecked")
88         List<String> actual = (List<String>) Interpreter.invoke(lf, List.of(source));
89 
90         Assert.assertEquals(expected, actual);
91     }
92 }