1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.StringConcatFactory;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* @test
* @summary Test StringConcatFactory.makeConcatWithTemplate... methods.
* @enablePreview true
*/
public class MakeConcatWithTemplate {
public static void main(String... args) {
makeConcatWithTemplate();
makeConcatWithTemplateCluster();
makeConcatWithTemplateGetters();
}
static List<String> fragments(int n) {
String[] array = new String[n];
Arrays.fill(array, "abc");
return Arrays.asList(array);
}
static List<Class<?>> types(int n) {
Class<?>[] array = new Class<?>[n];
Arrays.fill(array, int.class);
return Arrays.asList(array);
}
static List<Integer> values(int n) {
Integer[] array = new Integer[n];
Arrays.fill(array, 123);
return Arrays.asList(array);
}
static List<MethodHandle> getters(int n) {
MethodHandle[] array = new MethodHandle[n];
MethodHandle m = MethodHandles.dropArguments(MethodHandles.constant(int.class, 123), 0, Object.class);
Arrays.fill(array, m);
return Arrays.asList(array);
}
static void makeConcatWithTemplate() {
try {
int n = StringConcatFactory.MAX_INDY_CONCAT_ARG_SLOTS - 1;
MethodHandle m = StringConcatFactory.makeConcatWithTemplate(fragments(n + 1), types(n));
m.invokeWithArguments(values(n));
} catch (Throwable e) {
throw new RuntimeException(e);
}
try {
int n = StringConcatFactory.MAX_INDY_CONCAT_ARG_SLOTS;
MethodHandle m = StringConcatFactory.makeConcatWithTemplate(fragments(n + 1), types(n));
m.invokeWithArguments(values(n));
} catch (Throwable e) {
throw new RuntimeException(e);
}
boolean threw = false;
try {
int n = StringConcatFactory.MAX_INDY_CONCAT_ARG_SLOTS + 1;
MethodHandle m = StringConcatFactory.makeConcatWithTemplate(fragments(n + 1), types(n));
m.invokeWithArguments(values(n));
} catch (Throwable e) {
threw = true;
}
if (!threw) {
throw new RuntimeException("Exception expected - makeConcatWithTemplate");
}
}
static void makeConcatWithTemplateCluster() {
int n = StringConcatFactory.MAX_INDY_CONCAT_ARG_SLOTS;
int c = 3;
try {
List<MethodHandle> ms = StringConcatFactory.makeConcatWithTemplateCluster(fragments(c * n + 1), types(c * n), n);
MethodHandle m0 = ms.get(0);
MethodHandle m1 = ms.get(1);
MethodHandle m2 = ms.get(2);
MethodHandle m3 = ms.get(3);
String s = (String)m0.invokeWithArguments(values(n));
List<Object> args = new ArrayList<>();
args.add(s);
args.addAll(values(n - 1)); // one less for carry over string
s = (String)m1.invokeWithArguments(args);
args.clear();
args.add(s);
args.addAll(values(n - 1)); // one less for carry over string
s = (String)m2.invokeWithArguments(args);
args.clear();
args.add(s);
args.addAll(values(2)); // two remaining carry overs
s = (String)m3.invokeWithArguments(args);
} catch (Throwable e) {
throw new RuntimeException(e);
}
}
static void makeConcatWithTemplateGetters() {
int n = StringConcatFactory.MAX_INDY_CONCAT_ARG_SLOTS;
int c = 3;
try {
MethodHandle m = StringConcatFactory.makeConcatWithTemplateGetters(fragments(c * n + 1), getters(c * n), n);
String s = (String)m.invoke(null);
} catch (Throwable e) {
throw new RuntimeException(e);
}
}
}
|
