Main.java revision 3294:9adfb22ff08f 
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
33import java.io.File;
34import java.util.*;
35import java.util.Map.Entry;
36import java.util.stream.StreamSupport;
37
38import javax.lang.model.element.Element;
39import javax.lang.model.element.ElementKind;
40import javax.lang.model.element.ModuleElement;
41import javax.lang.model.element.PackageElement;
42import javax.lang.model.element.TypeElement;
43import javax.lang.model.util.Elements;
44import javax.tools.*;
45import javax.tools.JavaFileManager.Location;
46
47import com.sun.source.util.JavacTask;
48import com.sun.tools.javac.model.JavacElements;
49
50import static javax.tools.StandardLocation.CLASS_PATH;
51import static javax.tools.StandardLocation.PLATFORM_CLASS_PATH;
52import static javax.tools.StandardLocation.SYSTEM_MODULES;
53import static javax.tools.JavaFileObject.Kind.CLASS;
54
55
56public class Main {
57
58    public static PackageElement getPackage(TypeElement type) {
59        Element owner = type;
60        while (owner.getKind() != ElementKind.PACKAGE)
61            owner = owner.getEnclosingElement();
62        return (PackageElement)owner;
63    }
64
65    static int progress = 0;
66    static JavaCompiler tool;
67    static JavacTask javac;
68    static Elements elements;
69
70    public static void main(String[] args) throws Exception {
71        JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
72        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
73            fm.setLocation(CLASS_PATH, Collections.<File>emptyList());
74            JavacTask javac = (JavacTask)tool.getTask(null, fm, null, null, null, null);
75            Elements elements = javac.getElements();
76
77            final Map<String, Set<String>> packages = new LinkedHashMap<>();
78
79            int nestedClasses = 0;
80            int classes = 0;
81
82            for (JavaFileObject file : fm.list(PLATFORM_CLASS_PATH, "", EnumSet.of(CLASS), true)) {
83                String type = fm.inferBinaryName(PLATFORM_CLASS_PATH, file);
84                if (type.endsWith("package-info"))
85                    continue;
86                if (type.endsWith("module-info"))
87                    continue;
88                String moduleName = fm.asPath(file).getName(1).toString();
89                try {
90                    ModuleElement me = elements.getModuleElement(moduleName);
91                    me.getClass();
92                    TypeElement elem = ((JavacElements) elements).getTypeElement(me, type);
93                    if (elem == null && type.indexOf('$') > 0) {
94                        nestedClasses++;
95                        type = null;
96                        continue;
97                    }
98                    classes++;
99                    String pack = getPackage(elem).getQualifiedName().toString();
100                    packages.computeIfAbsent(me.getQualifiedName().toString(),
101                                             m -> new LinkedHashSet<>()).add(pack);
102                    elem.getKind(); // force completion
103                    type = null;
104                } finally {
105                    if (type != null)
106                        System.err.println("Looking at " + type);
107                }
108            }
109            javac = null;
110            elements = null;
111
112            javac = (JavacTask)tool.getTask(null, fm, null, null, null, null);
113            elements = javac.getElements();
114
115            for (Entry<String, Set<String>> module2Packages : packages.entrySet()) {
116                ModuleElement me = elements.getModuleElement(module2Packages.getKey());
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}
145