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
|
/*
* Copyright (c) 2010, 2015, 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.
*/
/*
* @test
* @bug 6911256 6964740 6967842 6961571 7025809
* @summary Test that the resource variable kind is appropriately set
* @author Joseph D. Darcy
* @library /tools/javac/lib
* @modules jdk.compiler
* @build JavacTestingAbstractProcessor TestResourceVariable
* @compile -processor TestResourceVariable -proc:only TestResourceVariable.java
*/
import java.io.*;
import javax.annotation.processing.*;
import javax.lang.model.*;
import javax.lang.model.element.*;
import javax.lang.model.type.*;
import javax.lang.model.util.*;
import java.util.*;
import com.sun.source.tree.*;
import com.sun.source.util.*;
import static javax.tools.Diagnostic.Kind.*;
/**
* Using the tree API, retrieve element representations of the
* resource of a try-with-resources statement and verify their kind
* tags are set appropriately.
*/
public class TestResourceVariable extends JavacTestingAbstractProcessor implements AutoCloseable {
int resourceVariableCount = 0;
public boolean process(Set<? extends TypeElement> annotations,
RoundEnvironment roundEnv) {
if (!roundEnv.processingOver()) {
Trees trees = Trees.instance(processingEnv);
for(Element rootElement : roundEnv.getRootElements()) {
TreePath treePath = trees.getPath(rootElement);
(new ResourceVariableScanner(trees)).
scan(trees.getTree(rootElement),
treePath.getCompilationUnit());
}
if (resourceVariableCount != 3)
throw new RuntimeException("Bad resource variable count " +
resourceVariableCount);
}
return true;
}
@Override
public void close() {}
private void test1() {
try(TestResourceVariable trv = this) {}
}
private void test2() {
try(TestResourceVariable trv1 = this; TestResourceVariable trv2 = trv1) {}
}
/**
* Verify that a resource variable modeled as an element behaves
* as expected under 6 and latest specific visitors.
*/
private static void testResourceVariable(Element element) {
ElementVisitor visitor6 = new ElementKindVisitor6<Void, Void>() {};
try {
visitor6.visit(element);
throw new RuntimeException("Expected UnknownElementException not thrown.");
} catch (UnknownElementException uee) {
; // Expected.
}
ElementKindVisitor visitorLatest =
new ElementKindVisitor<Object, Void>() {
@Override
public Object visitVariableAsResourceVariable(VariableElement e,
Void p) {
return e; // a non-null value
}
};
if (visitorLatest.visit(element) == null) {
throw new RuntimeException("Null result of resource variable visitation.");
}
}
class ResourceVariableScanner extends TreeScanner<Void, CompilationUnitTree> {
private Trees trees;
public ResourceVariableScanner(Trees trees) {
super();
this.trees = trees;
}
@Override
public Void visitVariable(VariableTree node, CompilationUnitTree cu) {
Element element = trees.getElement(trees.getPath(cu, node));
System.out.println("Name: " + element.getSimpleName() +
"\tKind: " + element.getKind());
if (element.getKind() == ElementKind.RESOURCE_VARIABLE) {
testResourceVariable(element);
resourceVariableCount++;
}
return super.visitVariable(node, cu);
}
}
}
|
