1 /*
 2  * Copyright (c) 2019, 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 package org.openjdk.bench.valhalla.sandbox.corelibs.corelibs.mapprotos;
24 
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.Setup;
27 
28 import java.util.Arrays;
29 import java.util.Collections;
30 import java.util.HashMap;
31 import java.util.Map;
32 import java.util.function.IntFunction;
33 
34 public class ReplX extends MapBase {
35     IntFunction<Map<Integer, Integer>> mapSupplier;
36     Integer[] mixed;
37     Map<Integer, Integer> map;
38 
39     @Setup
40     public void setup() {
41         super.init(size);
42         try {
43             Class<?> mapClass = Class.forName(mapType);
44             mapSupplier =  (size) -> newInstance(mapClass, size);
45 
46             map = mapSupplier.apply(0);
47             for (Integer k : keys) {
48                 map.put(k, k);
49             }
50             mixed = new Integer[size];
51             System.arraycopy(keys, 0, mixed, 0, size / 2);
52             System.arraycopy(nonKeys, 0, mixed, size / 2, size / 2);
53             Collections.shuffle(Arrays.asList(mixed), rnd);
54         } catch (Exception ex) {
55             System.out.printf("%s: %s%n", mapType, ex.getMessage());
56             return;
57         }
58     }
59 
60     Map<Integer, Integer> newInstance(Class<?> mapClass, int size) {
61         try {
62             return (Map<Integer, Integer>)mapClass.getConstructor(int.class).newInstance(size);
63         } catch (Exception ex) {
64             throw new RuntimeException("failed", ex);
65         }
66     }
67 
68     @Benchmark
69     public Map<Integer, Integer> replace() {
70         Integer[] keys = this.keys;
71         for (Integer k : mixed) {
72             if (map.size() < size) {
73                 map.put(k, k);
74             } else {
75                 map.remove(k);
76             }
77         }
78         return map;
79     }
80 
81 }