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
|
/*
* Copyright 2023 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.googlejavaformat.intellij;
import com.google.common.base.Suppliers;
import com.intellij.ide.ui.IdeUiService;
import com.intellij.notification.Notification;
import com.intellij.notification.NotificationType;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import java.util.function.Supplier;
class JreConfigurationChecker {
private static final Supplier<Boolean> hasAccess =
Suppliers.memoize(JreConfigurationChecker::checkJreConfiguration);
private static final Logger logger = Logger.getInstance(JreConfigurationChecker.class);
private final Project project;
public JreConfigurationChecker(Project project) {
this.project = project;
}
static boolean checkJreConfiguration(Project project) {
var success = hasAccess.get();
if (!success) {
project.getService(JreConfigurationChecker.class).displayConfigurationErrorNotification();
}
return success;
}
/**
* Determine whether the JRE is configured to work with the google-java-format plugin. If not,
* display a notification with instructions and return false.
*/
private static boolean checkJreConfiguration() {
try {
return testClassAccess(
"com.sun.tools.javac.api.JavacTrees",
"com.sun.tools.javac.code.Flags",
"com.sun.tools.javac.file.JavacFileManager",
"com.sun.tools.javac.parser.JavacParser",
"com.sun.tools.javac.tree.JCTree",
"com.sun.tools.javac.util.Log");
} catch (ClassNotFoundException e) {
logger.error("Error checking jre configuration for google-java-format", e);
return false;
}
}
private static boolean testClassAccess(String... classNames) throws ClassNotFoundException {
for (String className : classNames) {
if (!testClassAccess(className)) {
return false;
}
}
return true;
}
private static boolean testClassAccess(String className) throws ClassNotFoundException {
Class<?> klass = Class.forName(className);
return klass
.getModule()
// isExported returns true if the package is either open or exported. Either one is
// sufficient
// to run the google-java-format code (even though the documentation specifies --add-opens).
.isExported(
klass.getPackageName(),
JreConfigurationChecker.class.getClassLoader().getUnnamedModule());
}
private void displayConfigurationErrorNotification() {
Notification notification =
new Notification(
"Configure JRE for google-java-format",
"Configure the JRE for google-java-format",
"The google-java-format plugin needs additional configuration before it can be used. "
+ "<a href=\"instructions\">Follow the instructions here</a>.",
NotificationType.INFORMATION);
notification.setListener(
(n, e) -> {
IdeUiService.getInstance()
.browse(
"https://github.com/google/google-java-format/blob/master/README.md#intellij-jre-config");
n.expire();
});
notification.notify(project);
}
}
|
