1 /*
2 * Copyright (c) 2006, 2016, 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
24 /**
25 * @test
26 * @bug 6374357 6308351 6707027
27 * @summary PackageElement.getEnclosedElements() throws ClassReader$BadClassFileException
28 * @author Peter von der Ah\u00e9
29 * @modules jdk.compiler/com.sun.tools.javac.model
30 * @run main/othervm -Xmx256m Main
31 */
32
33 import java.io.File;
34 import java.util.*;
35 import java.util.Map.Entry;
36
37 import javax.lang.model.element.Element;
38 import javax.lang.model.element.ElementKind;
39 import javax.lang.model.element.ModuleElement;
40 import javax.lang.model.element.PackageElement;
41 import javax.lang.model.element.TypeElement;
42 import javax.lang.model.util.Elements;
43 import javax.tools.*;
44
45 import com.sun.source.util.JavacTask;
46 import com.sun.tools.javac.model.JavacElements;
47
48 import static javax.tools.StandardLocation.CLASS_PATH;
49 import static javax.tools.StandardLocation.PLATFORM_CLASS_PATH;
50 import static javax.tools.JavaFileObject.Kind.CLASS;
51
52
53 public class Main {
54
55 public static PackageElement getPackage(TypeElement type) {
56 Element owner = type;
57 while (owner.getKind() != ElementKind.PACKAGE)
58 owner = owner.getEnclosingElement();
59 return (PackageElement)owner;
60 }
61
62 static int progress = 0;
63 static JavaCompiler tool;
64 static JavacTask javac;
65 static Elements elements;
66
67 static List<String> addmods_ALL_SYSTEM = Arrays.asList("--add-modules", "ALL-SYSTEM");
68
69 public static void main(String[] args) throws Exception {
70 JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
71 try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
72 fm.setLocation(CLASS_PATH, Collections.<File>emptyList());
73 JavacTask javac = (JavacTask)tool.getTask(null, fm, null, addmods_ALL_SYSTEM, null, null);
74 Elements elements = javac.getElements();
75
76 final Map<String, Set<String>> packages = new LinkedHashMap<>();
77
78 int nestedClasses = 0;
79 int classes = 0;
80
81 for (JavaFileObject file : fm.list(PLATFORM_CLASS_PATH, "", EnumSet.of(CLASS), true)) {
82 String type = fm.inferBinaryName(PLATFORM_CLASS_PATH, file);
83 if (type.endsWith("package-info"))
84 continue;
85 if (type.endsWith("module-info"))
86 continue;
87 String moduleName = fm.asPath(file).getName(1).toString();
88 try {
89 ModuleElement me = elements.getModuleElement(moduleName);
90 me.getClass();
91 TypeElement elem = ((JavacElements) elements).getTypeElement(me, type);
92 if (elem == null && type.indexOf('$') > 0) {
93 nestedClasses++;
94 type = null;
95 continue;
96 }
97 classes++;
98 String pack = getPackage(elem).getQualifiedName().toString();
99 packages.computeIfAbsent(me.getQualifiedName().toString(),
100 m -> new LinkedHashSet<>()).add(pack);
101 elem.getKind(); // force completion
102 type = null;
103 } finally {
104 if (type != null)
105 System.err.println("Looking at " + type);
106 }
107 }
108 javac = null;
109 elements = null;
110
111 javac = (JavacTask)tool.getTask(null, fm, null, addmods_ALL_SYSTEM, null, null);
112 elements = javac.getElements();
113
114 for (Entry<String, Set<String>> module2Packages : packages.entrySet()) {
115 ModuleElement me = elements.getModuleElement(module2Packages.getKey());
116 me.getClass();
117 for (String name : module2Packages.getValue()) {
118 PackageElement pe = ((JavacElements) elements).getPackageElement(me, name);
119 for (Element e : pe.getEnclosedElements()) {
120 e.getSimpleName().getClass();
121 }
122 }
123 }
124 /*
125 * A few sanity checks based on current values:
126 *
127 * packages: 775, classes: 12429 + 5917
128 *
129 * As the platform evolves the numbers are likely to grow
130 * monotonically but in case somebody gets a clever idea for
131 * limiting the number of packages exposed, this number might
132 * drop. So we test low values.
133 */
134 System.out.format("packages: %s, classes: %s + %s%n",
135 packages.size(), classes, nestedClasses);
136 if (classes < 9000)
137 throw new AssertionError("Too few classes in PLATFORM_CLASS_PATH ;-)");
138 if (packages.values().stream().flatMap(packs -> packs.stream()).count() < 530)
139 throw new AssertionError("Too few packages in PLATFORM_CLASS_PATH ;-)");
140 if (nestedClasses < 3000)
141 throw new AssertionError("Too few nested classes in PLATFORM_CLASS_PATH ;-)");
142 }
143 }
144 }