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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* Copyright (c) 2006, 2014, 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.io.*;
import java.util.*;
import javax.lang.model.util.*;
import javax.tools.*;
import com.sun.tools.javac.api.*;
import com.sun.source.tree.*;
import com.sun.source.util.*;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.*;
import com.sun.tools.javac.util.Position;
/*
* Abstract class to help check the scopes in a parsed source file.
* -- parse source file
* -- scan trees looking for string literals
* -- check the scope at that point against the string, using
* boolean check(Scope s, String ref)
*/
abstract class Checker {
// parse the source file and call check(scope, string) for each string literal found
void check(String... fileNames) throws IOException {
File testSrc = new File(System.getProperty("test.src"));
DiagnosticListener<JavaFileObject> dl = new DiagnosticListener<JavaFileObject>() {
public void report(Diagnostic d) {
System.err.println(d);
if (d.getKind() == Diagnostic.Kind.ERROR)
errors = true;
new Exception().printStackTrace();
}
};
JavacTool tool = JavacTool.create();
try (StandardJavaFileManager fm = tool.getStandardFileManager(dl, null, null)) {
Iterable<? extends JavaFileObject> files =
fm.getJavaFileObjectsFromFiles(getFiles(testSrc, fileNames));
task = tool.getTask(null, fm, dl, null, null, files);
Iterable<? extends CompilationUnitTree> units = task.parse();
if (errors)
throw new AssertionError("errors occurred creating trees");
ScopeScanner s = new ScopeScanner();
for (CompilationUnitTree unit: units) {
TreePath p = new TreePath(unit);
s.scan(p, getTrees());
additionalChecks(getTrees(), unit);
}
task = null;
if (errors)
throw new AssertionError("errors occurred checking scopes");
}
}
// default impl: split ref at ";" and call checkLocal(scope, ref_segment) on scope and its enclosing scopes
protected boolean check(Scope s, String ref) {
// System.err.println("check scope: " + s);
// System.err.println("check ref: " + ref);
if (s == null && (ref == null || ref.trim().length() == 0))
return true;
if (s == null) {
error(s, ref, "scope missing");
return false;
}
if (ref == null) {
error(s, ref, "scope unexpected");
return false;
}
String local;
String encl;
int semi = ref.indexOf(';');
if (semi == -1) {
local = ref;
encl = null;
} else {
local = ref.substring(0, semi);
encl = ref.substring(semi + 1);
}
return checkLocal(s, local.trim())
& check(s.getEnclosingScope(), encl);
}
// override if using default check(Scope,String)
boolean checkLocal(Scope s, String ref) {
throw new IllegalStateException();
}
void additionalChecks(Trees trees, CompilationUnitTree topLevel) throws IOException {
}
void error(Scope s, String ref, String msg) {
System.err.println("Error: " + msg);
System.err.println("Scope: " + (s == null ? null : asList(s.getLocalElements())));
System.err.println("Expect: " + ref);
System.err.println("javac: " + (s == null ? null : ((JavacScope) s).getEnv()));
errors = true;
}
protected Elements getElements() {
return task.getElements();
}
protected Trees getTrees() {
return Trees.instance(task);
}
boolean errors = false;
protected JavacTask task;
// scan a parse tree, and for every string literal found, call check(scope, string) with
// the string value at the scope at that point
class ScopeScanner extends TreePathScanner<Boolean,Trees> {
public Boolean visitLiteral(LiteralTree tree, Trees trees) {
TreePath path = getCurrentPath();
CompilationUnitTree unit = path.getCompilationUnit();
Position.LineMap lineMap = ((JCCompilationUnit)unit).lineMap;
// long line = lineMap.getLineNumber(((JCTree)tree).pos/*trees.getSourcePositions().getStartPosition(tree)*/);
// System.err.println(line + ": " + abbrev(tree));
Scope s = trees.getScope(path);
if (tree.getKind() == Tree.Kind.STRING_LITERAL)
check(s, tree.getValue().toString().trim());
return null;
}
private String abbrev(Tree tree) {
int max = 48;
String s = tree.toString().replaceAll("[ \n]+", " ");
return (s.length() < max ? s : s.substring(0, max-3) + "...");
}
}
// prefix filenames with a directory
static Iterable<File> getFiles(File dir, String... names) {
List<File> files = new ArrayList<File>(names.length);
for (String name: names)
files.add(new File(dir, name));
return files;
}
static private <T> List<T> asList(Iterable<T> iter) {
List<T> l = new ArrayList<T>();
for (T t: iter)
l.add(t);
return l;
}
}
|
